Retractable needle/syringe devices for blood collection, catheterization, and medicinal injection procedures

Claim 2

A retractable hypodermic needle/syringe device adapted for use in fluid collection and dispensing procedures, comprising: an elongated, substantially tubular housing, said housing having a first end portion and an opposite second end portion, said second end portion having an opening therethrough; a barrel member disposed within said housing and being formed with a front end portion adjacent said second end portion of said housing and a closed back end portion, said barrel member slidably translatable within said housing forwardly from a first position to a second position and back again; a hollow hypodermic needle disposed adjacent said second end portion of said housing in fixed engagement with said front end portion of said barrel member, said needle formed with a first open end extending into said barrel member and a second open end axially aligned with said opening in said second end portion of said housing, said second open end of said needle passing through said opening and projecting out of said housing upon forward translation of said barrel member to said second position; translation means for forwardly translating said barrel member within said housing from said first position to said second position; locking means cooperating with said translation means for automatically releasably locking said barrel member in said second position and thereby maintaining said second open end of said needle in a projected state without assistance from the user of said device; drawing and dispensing means slidably received within said barrel member, said drawing and dispensing means adapted to draw fluid into and dispense said fluid from said barrel member via said needle; and resilient means disposed within said housing to bias said barrel member in said first position, said resilient means yieldingly urging said barrel member forwardly to said second position in response to operation of said translation means so as to project said second open end of said needle from said housing, said resilient means resiliently urging said barrel member back to said first position in response to the release of said locking means such that said second open end of said needle fully retracts into said housing.

Claim 3

A retractable needle/syringe device according to claim 1, wherein said resilient means comprises a coil spring member encircling said needle in abutting alignment between said barrel member and said second end portion of said housing.

Claim 4

A retractable hypodermic needle/syringe device adapted for use in fluid collection and dispensing procedures, comprising: an elongated, substantially tubular housing, said housing having a first end portion and an opposite second end portion, said second end portion having an opening therethrough; a barrel member disposed within said housing and being formed with a front end portion adjacent said second end portion of said housing and a closed back end portion, said barrel member slidably translatable within said housing forwardly from a first position to a second position and back again; a hollow hypodermic needle disposed adjacent said second end portion of said housing in fixed engagement with said front end portion of said barrel member, said needle formed with a first open end extending into said barrel member and a second open end axially aligned with said opening in said second end portion of said housing, said second open end of said needle passing through said opening and projecting out of said housing upon forward translation of said barrel member to said second position; a piston member slidably disposed through said first end portion of said housing in abutting alignment with said back end portion of said barrel member, said piston member formed with a push button portion projecting outwardly of said housing, said piston member translating forwardly within said housing in response to forward pressure applied to said push button so as to move said barrel member from said first position to said second position; locking means cooperating with said piston member for automatically releasably locking said barrel member in said second position and thereby fixedly projecting said second open end of said needle out of said housing, said piston member translating backwardly in response to the release of said locking means so as to allow said barrel member to return to said first position; drawing and dispensing means slidably received within said barrel member, said drawing and dispensing means adapted to draw fluid into and dispense said fluid from said barrel member via said needle; and resilient means disposed within said housing to bias said barrel member in said first position, said resilient means yieldingly urging said barrel member forwardly to said second position in response to operation of said piston member so as to project said second open end of said needle from said housing, said resilient means resiliently urging said barrel member back to said first position in response to the release of said locking means such that said second open end of said needle fully retracts into said housing.

Claim 5

A retractable hypodermic needle/syringe device adapted for use in fluid collection and dispensing procedures, comprising: an elongated, substantially tubular housing, said housing having a first end portion and an opposite second end portion, said second end portion having an opening therethrough; a barrel member disposed within said housing and being formed with a front end portion adjacent said second end portion of said housing and a closed back end portion, said barrel member slidably translatable within said housing forwardly from a first position to a second position and back again; a hollow hypodermic needle disposed adjacent said second end portion of said housing in fixed engagement with said front end portion of said barrel member, said needle formed with a first open end extending into said barrel member and a second open end axially aligned with said opening in said second end portion of said housing, said second open end of said needle passing through said opening and projecting out of said housing upon forward translation of said barrel member to said second position; a piston member slidably disposed through said first end portion of said housing in abutting alignment with said back end portion of said barrel member, said piston member formed with a push button portion projecting outwardly of said housing, said piston member translating forwardly within said housing in response to forward pressure applied to said push button so as to move said barrel member from said first position to said second position; locking means cooperating with said piston member for automatically releasably locking said barrel member in said second position and thereby fixedly projecting said second open end of said needle out of said housing, said piston member translating backwardly in response to the release of said locking means so as to allow said barrel member to return to said first position; drawing and dispensing means slidably received within said barrel member, said drawing and dispensing means adapted to draw fluid into and dispense said fluid from said barrel member via said needle; and resilient means disposed within said housing to bias said barrel member in said first position, said resilient means yieldingly urging said barrel member forwardly to said second position in response to operation of said piston member so as to project said second open end of said needle from said housing, said resilient means resiliently urging said barrel member back to said first position in response to the release of said locking means such that said second open end of said needle fully retracts into said housing.

Claim 6

A retractable needle/syringe device according to claim 3, wherein said locking means comprises: a resilient arm member having a first end portion integrated with said piston member and a second end portion angularly biased away from said piston member, said second end portion of said arm member formed with a first prong member and a second prong member, said housing providing first and second receiving apertures to receive said first and second prong members, respectively, when said barrel member is in said first position, said first and second receiving apertures each providing a front edge and a rear edge; said first prong member engaging said front edge of said first receiving aperture in response to forward pressure applied to said push button causing said arm member to yieldingly urge said first prong member into said housing thence project said first prong member into said second receiving aperture, said resilient means biasing said first prong member against said rear edge of said second receiving aperture in response to subsequent release of said push button to lock said barrel member in said second position; said second prong member engaging said front edge of said second receiving aperture in response to forward pressure applied to said push button when said barrel member is in said second position causing said arm member to yieldingly urge said first prong member back into said housing, said resilient means urging said barrel member back to said first position upon subsequent release of said push button causing said arm member to project said first prong member back into said first receiving aperture.

Claim 7

A retractable hypodermic needle/syringe device adapted for use in fluid collection and dispensing procedures, comprising: an elongated, substantially tubular housing, said housing having a first end portion and an opposite second end portion, said second end portion having an opening therethrough; a barrel member disposed within said housing and being formed with a front end portion adjacent said second end portion of said housing and a closed back end portion, said barrel member slidably translatable within said housing forwardly from a first position to a second position and back again; a hollow hypodermic needle disposed adjacent said second end portion of said housing in fixed engagement with said front end portion of said barrel member, said needle formed with a first open end extending into said barrel member and a second open end axially aligned with said opening in said second end portion of said housing, said second open end of said needle passing through said opening and projecting out of said housing upon forward translation of said barrel member to said second position; translation means for forwardly translating said barrel member within said housing from said first position to said second position; locking means cooperating with said translation means for automatically releasably locking said barrel member in said second position and thereby fixedly projecting said second open end of said needle out of said housing; a plunger member slidably disposed within said barrel member, said plunger member connected to an operator arm projecting out of said housing through cooperating elongated apertures formed on said barrel member and said housing, said plunger member backwardly translatable within said barrel member in response to backward pressure applied to said operator arm so as to selectively draw said fluid into said barrel member through said needle, said plunger member forwardly translatable within said barrel member in response to forward pressure applied to said operator arm so as to selectively dispense said fluid from said barrel member through said needle; and resilient means disposed within said housing to bias said barrel member in said first position, said resilient means yieldingly urging said barrel member forwardly to said second position in response to operation of said translation means so as to project said second open end of said needle from said housing, said resilient means resiliently urging said barrel member back to said first position in response to the release of said locking means such that said second open end of said needle fully retracts into said housing.

Claim 8

A retractable hypodermic needle/syringe device adapted for use in fluid collection and dispensing procedures, comprising: an elongated, substantially tubular housing, said housing having a first end portion and an opposite second end portion, said second end portion having an opening therethrough; a barrel member disposed within said housing and being formed with a front end portion adjacent said second end portion of said housing and a closed back end portion, said barrel member slidably translatable within said housing forwardly from a first position to a second position and back again; a hollow hypodermic needle disposed adjacent said second end portion of said housing in fixed engagement with said front end portion of said barrel member, said needle formed with a first open end extending into said barrel member and a second open end axially aligned with said opening in said second end portion of said housing, said second open end of said needle passing through said opening and projecting out of said housing upon forward translation of said barrel member to said second position; translation means for forwardly translating said barrel member within said housing from said first position to said second position; locking means cooperating with said translation means for automatically releasably locking said barrel member in said second position and thereby fixedly projecting said second open end of said needle out of said housing; a plunger member slidably disposed within said barrel member, said plunger member connected to an operator arm projecting out of said housing through cooperating elongated apertures formed on said barrel member and said housing, said plunger member backwardly translatable within said barrel member in response to backward pressure applied to said operator arm so as to selectively draw said fluid into said barrel member through said needle, said plunger member forwardly translatable within said barrel member in response to forward pressure applied to said operator arm so as to selectively dispense said fluid from said barrel member through said needle; and resilient means disposed within said housing to bias said barrel member in said first position, said resilient means yieldingly urging said barrel member forwardly to said second position in response to operation of said translation means so as to project said second open end of said needle from said housing, said resilient means resiliently urging said barrel member back to said first position in response to the release of said locking means such that said second open end of said needle fully retracts into said housing.

Claim 9

A retractable needle/syringe device according to claim 1, further comprising a catheter member slidably disposed over said needle, said catheter member enclosed within said housing when said barrel member is in said first position, at least a portion of said catheter member projecting out of said housing through said opening in said second end portion thereof in response to forward translation of said barrel member to said second position so as to permit the user of said device to grasp the catheter and guide it into a patient's vein via said needle.

Claim 10

A retractable hypodermic needle/syringe device adapted for use in fluid collection and dispensing procedures, comprising: an elongated, substantially tubular housing, said housing having a first end portion and an opposite second end portion, said second end portion having an opening therethrough; a barrel member disposed within said housing and being formed with a front end portion adjacent said second end portion of said housing and a closed back end portion, said barrel member slidably translatable within said housing forwardly from a first position to a second position and back again; a hollow hypodermic needle member disposed adjacent said second end portion of said housing in fixed engagement with said front end portion of said barrel member, said needle formed with a first open end extending into said barrel member and a second open end axially aligned with said opening in said second end portion of said housing, said second open end of said needle passing through said opening and projecting out of said housing upon forward translation of said barrel member to said second position; a plunger member slidably disposed with said barrel member, said plunger member being connected to an operator arm projecting out of said housing through cooperating elongated apertures formed on said barrel member and said housing, said plunger member backwardly translatable within said barrel member in response to backward pressure applied to said operator arm so as to selectively draw fluid into said barrel member through said needle, said plunger member forwardly translatable within said barrel member in response to forward pressure applied to said operator arm so as to selectively discharge said fluid from said barrel member through said needle; translation means for forwardly translating said barrel member within said housing from said first position to said second position; locking means cooperating with said translation means for automatically releasably locking said barrel member in said second position and thereby fixedly projecting said second open end of said needle out of said housing; and a coil spring member encircling said needle in abutting alignment between said barrel member and said second end portion of said housing so as to bias said barrel member in said first position, said spring member yieldingly urging said barrel member forwardly to said second position in response to operation of said translation means so as to project said second open end of said needle from said housing, said spring member urging said barrel member back to said first position in response to the release of said locking means such that said second open end of said needle fully retracts into said housing.

Claim 11

A retractable hypodermic needle/syringe device adapted for use in fluid collection and dispensing procedures, comprising: an elongated, substantially tubular housing, said housing having a first end portion and an opposite second end portion, said second end portion having an opening therethrough; a barrel member disposed within said housing and being formed with a front end portion adjacent said second end portion of said housing and a closed back end portion, said barrel member slidably translatable within said housing forwardly from a first position to a second position and back again; a hollow hypodermic needle member disposed adjacent said second end portion of said housing in fixed engagement with said front end portion of said barrel member, said needle formed with a first open end extending into said barrel member and a second open end axially aligned with said opening in said second end portion of said housing, said second open end of said needle passing through said opening and projecting out of said housing upon forward translation of said barrel member to said second position; a plunger member slidably disposed with said barrel member, said plunger member being connected to an operator arm projecting out of said housing through cooperating elongated apertures formed on said barrel member and said housing, said plunger member backwardly translatable within said barrel member in response to backward pressure applied to said operator arm so as to selectively draw fluid into said barrel member through said needle, said plunger member forwardly translatable within said barrel member in response to forward pressure applied to said operator arm so as to selectively discharge said fluid from said barrel member through said needle; translation means for forwardly translating said barrel member within said housing from said first position to said second position; locking means cooperating with said translation means for automatically releasably locking said barrel member in said second position and thereby fixedly projecting said second open end of said needle out of said housing; and a coil spring member encircling said needle in abutting alignment between said barrel member and said second end portion of said housing so as to bias said barrel member in said first position, said spring member yieldingly urging said barrel member forwardly to said second position in response to operation of said translation means so as to project said second open end of said needle from said housing, said spring member urging said barrel member back to said first position in response to the release of said locking means such that said second open end of said needle fully retracts into said housing.

Claim 12

A retractable needle/syringe device according to claim 7, wherein said translation means comprises a piston member slidably disposed through said first end portion of said housing in abutting alignment with said back end portion of said barrel member, said piston member formed with a push button portion projecting outwardly of said housing, said piston member translating forwardly within said housing in response to forward pressure applied to said push button so as to move said barrel member from said first position to said second position, said piston member translating backwardly in response to the release of said locking means so as to allow said barrel member to return to said first position.

Claim 13

A retractable needle/syringe device according to claim 8, wherein said locking means comprises: a resilient arm member having a first end portion integrated with said piston member and a second end portion angularly biased away from said piston member, said second end portion of said arm member formed with a first prong member and a second prong member, said housing providing first and second receiving apertures to receive said first and second prong members, respectively, when said barrel member is in said first position, said first and second receiving apertures each providing a front edge and a rear edge; said first prong member engaging said front edge of said first receiving aperture in response to forward pressure applied to said push button causing said arm member to yieldingly urge said first prong member into said housing thence project said first prong member into said second receiving aperture, said resilient means biasing said first prong member against said rear edge of said second receiving aperture in response to subsequent release of said push button to lock said barrel member in said second position; said second prong member engaging said front edge of said second receiving aperture in response to forward pressure applied to said push button when said barrel member is in said second position causing said arm member to yieldingly urge said first prong member back into said housing, said resilient means urging said barrel member back to said first position upon subsequent release of said push button causing said arm member to project said first prong member back into said first receiving aperture.

Claim 14

A retractable needle/syringe device according to claim 9, further comprising a catheter member slidably disposed over said needle, said catheter member enclosed within said housing when said barrel member is in said first position, at least a portion of said catheter member projecting out of said housing through said opening in said second end portion thereof in response to forward translation of said barrel member to said second position so as to permit the user of said device to grasp the catheter and guide it into a patient's vein via said needle.

Claim 15

A retractable hypodermic needle/syringe device adapted for use in medicinal injection procedures, comprising: an elongated, substantially tubular housing, said housing having a first end portion and an opposite end portion, said second end portion having an opening therethrough; a barrel member disposed within said housing and being formed with a front end portion adjacent said second end portion of said housing and a closed back end portion, said barrel member slidably translatable within said housing forwardly from a first position to a second position and back again; a hollow hypodermic needle member disposed adjacent said second end portion of said housing in fixed engagement with said front end portion of said barrel member, said needle formed with a first open and extending into said barrel member and a second open end axially aligned with said opening in said second end portion of said housing, said second open end of said needle passing through said opening and projecting out of said housing upon forward translation of said barrel member to said second position; translation means for forwardly translating said barrel member within said housing from said first position to said second position; locking means cooperating with said translation means for automatically releasably locking said barrel member in said second position and thereby maintaining said second open end of said needle in a projected state without assistance from the user of said device; resilient means disposed within said housing to bias said barrel member in said first position, said resilient means yieldingly urging said barrel member forwardly to said second position in response to operation of said translation means so as to project said second open end of said needle from said housing, said resilient means resiliently urging said barrel member back to said first position in response to the release of said locking means such that said second open end of said needle fully retracts into said housing; an ampule slidably received within said barrel member in frictional engagement therewith and containing a liquid medicament to be administered to a patient by injection, said ampule being formed with a first seal member at one end thereof, said ampule forwardly translatable within said barrel member to as to cause said first open end of said needle to penetrate said first seal member and thereby place said needle in fluid communication with said medicament, said ampule further being backwardly translatable within said barrel member so as to aspirate for blood prior to injecting said medicament; stop means engaging said ampule so as to prevent further forward translation thereof subsequent to said needle establishing said fluid communication with said medicament; and plunger means for forwardly translating said ampule so as to effectuate said fluid communication between said needle and said medicament and backwardly translating said ampule so as to aspirate said needle, said plunger means being adapted to selectively dispense said medicament from said ampule upon engagement of said ampule with said stop means.

Claim 16

A retractable hypodermic needle/syringe device adapted for use in medicinal injection procedures, comprising: an elongated, substantially tubular housing, said housing having a first end portion and an opposite end portion, said second end portion having an opening therethrough; a barrel member disposed within said housing and being formed with a front end portion adjacent said second end portion of said housing and a closed back end portion, said barrel member slidably translatable within said housing forwardly from a first position to a second position and back again; a hollow hypodermic needle member disposed adjacent said second end portion of said housing in fixed engagement with said front end portion of said barrel member, said needle formed with a first open and extending into said barrel member and a second open end axially aligned with said opening in said second end portion of said housing, said second open end of said needle passing through said opening and projecting out of said housing upon forward translation of said barrel member to said second position; translation means for forwardly translating said barrel member within said housing from said first position to said second position; locking means cooperating with said translation means for automatically releasably locking said barrel member in said second position and thereby maintaining said second open end of said needle in a projected state without assistance from the user of said device; resilient means disposed within said housing to bias said barrel member in said first position, said resilient means yieldingly urging said barrel member forwardly to said second position in response to operation of said translation means so as to project said second open end of said needle from said housing, said resilient means resiliently urging said barrel member back to said first position in response to the release of said locking means such that said second open end of said needle fully retracts into said housing; an ampule slidably received within said barrel member in frictional engagement therewith and containing a liquid medicament to be administered to a patient by injection, said ampule being formed with a first seal member at one end thereof, said ampule forwardly translatable within said barrel member to as to cause said first open end of said needle to penetrate said first seal member and thereby place said needle in fluid communication with said medicament, said ampule further being backwardly translatable within said barrel member so as to aspirate for blood prior to injecting said medicament; stop means engaging said ampule so as to prevent further forward translation thereof subsequent to said needle establishing said fluid communication with said medicament; and plunger means for forwardly translating said ampule so as to effectuate said fluid communication between said needle and said medicament and backwardly translating said ampule so as to aspirate said needle, said plunger means being adapted to selectively dispense said medicament from said ampule upon engagement of said ampule with said stop means.

Claim 17

A retractable needle/syringe device according to claim 11, wherein said resilient means comprises a coil spring member encircling said needle in abutting alignment between said barrel member and said second end portion of said housing.

Claim 18

A retractable hypodermic needle/syringe device adapted for use in medicinal injection procedures, comprising: an elongated, substantially tubular housing, said housing having a first end portion and an opposite second end portion, said second end portion having an opening therethrough; a barrel member disposed within said housing and being formed with a front end portion adjacent said second end portion of said housing and a closed back end portion, said barrel member slidably translatable within said housing forwardly from a first position to a second position and back again; a hollow hypodermic needle member disposed adjacent said second end portion of said housing in fixed engagement with said front end portion of said barrel member, said needle formed with a first open end extending into said barrel member and a second open end axially aligned with said opening in said second end portion of said housing, said second open end of said needle passing through said opening and projecting out of said housing upon forward translation of said member to said second position; a piston member slidably disposed through said first end portion of said housing in abutting alignment with said back end portion of said barrel member, said piston member formed with a push button portion projecting outwardly of said housing, said piston member translating forwardly within said housing in response to forward pressure applied to said push button so as to move said barrel member from said first position to said second position; locking means cooperating with said piston member for automatically releasably locking said barrel member in said second position and thereby fixedly projecting said second open end of said needle out of said housing, said piston member translating backwardly in response to the release of said locking means so as to allow said barrel member to return to said first position; resilient means disposed within said housing to bias said barrel member in said first position, said resilient means yieldingly urging said barrel member forwardly to said second position in response to operation of said piston member so as to project said second open end of said needle from said housing, said resilient means resiliently urging said barrel member back to said first position in response to the release of said locking means such that said second open end of said needle fully retracts into said housing; an ampule slidably received within said barrel member in frictional engagement therewith and containing a liquid medicament to be administered to a patient by injection, said ampule being formed with a first seal member at one end thereof, said ampule forwardly translatable within said barrel member so as to cause said first open end of said needle to penetrate said first seal member and thereby place said needle in fluid communication with said medicament, said ampule further being backwardly translatable within said barrel member so as to aspirate for blood prior to injecting said medicament; stop means engaging said ampule so as to prevent further forward translation thereof subsequent to said needle establishing said fluid communication with said medicament; and plunger means for forwardly translating said ampule so as to effectuate said fluid communication between said needle and said medicament and backwardly translating said ampule so as to aspirate said needle, said plunger means being adapted to selectively dispense said medicament from said ampule upon engagement of said ampule with said stop means.

Claim 19

A retractable hypodermic needle/syringe device adapted for use in medicinal injection procedures, comprising: an elongated, substantially tubular housing, said housing having a first end portion and an opposite second end portion, said second end portion having an opening therethrough; a barrel member disposed within said housing and being formed with a front end portion adjacent said second end portion of said housing and a closed back end portion, said barrel member slidably translatable within said housing forwardly from a first position to a second position and back again; a hollow hypodermic needle member disposed adjacent said second end portion of said housing in fixed engagement with said front end portion of said barrel member, said needle formed with a first open end extending into said barrel member and a second open end axially aligned with said opening in said second end portion of said housing, said second open end of said needle passing through said opening and projecting out of said housing upon forward translation of said member to said second position; a piston member slidably disposed through said first end portion of said housing in abutting alignment with said back end portion of said barrel member, said piston member formed with a push button portion projecting outwardly of said housing, said piston member translating forwardly within said housing in response to forward pressure applied to said push button so as to move said barrel member from said first position to said second position; locking means cooperating with said piston member for automatically releasably locking said barrel member in said second position and thereby fixedly projecting said second open end of said needle out of said housing, said piston member translating backwardly in response to the release of said locking means so as to allow said barrel member to return to said first position; resilient means disposed within said housing to bias said barrel member in said first position, said resilient means yieldingly urging said barrel member forwardly to said second position in response to operation of said piston member so as to project said second open end of said needle from said housing, said resilient means resiliently urging said barrel member back to said first position in response to the release of said locking means such that said second open end of said needle fully retracts into said housing; an ampule slidably received within said barrel member in frictional engagement therewith and containing a liquid medicament to be administered to a patient by injection, said ampule being formed with a first seal member at one end thereof, said ampule forwardly translatable within said barrel member so as to cause said first open end of said needle to penetrate said first seal member and thereby place said needle in fluid communication with said medicament, said ampule further being backwardly translatable within said barrel member so as to aspirate for blood prior to injecting said medicament; stop means engaging said ampule so as to prevent further forward translation thereof subsequent to said needle establishing said fluid communication with said medicament; and plunger means for forwardly translating said ampule so as to effectuate said fluid communication between said needle and said medicament and backwardly translating said ampule so as to aspirate said needle, said plunger means being adapted to selectively dispense said medicament from said ampule upon engagement of said ampule with said stop means.

Claim 20

A retractable needle/syringe device according to claim 13, wherein said locking means comprises: a resilient arm member having a first end portion integrated with said piston member and a second end portion angularly biased away from said piston member, said second end portion of said arm member formed with a first prong member and a second prong member, said housing providing first and second receiving apertures to receive said first and second prong members, respectively, when said barrel member is in said first position, said first and second receiving apertures each providing a front edge and a rear edge; said first prong member engaging said front edge of said first receiving aperture in response to forward pressure applied to said push button causing said arm member to yieldingly urge said first prong member into said housing thence project said first prong member into said second receiving aperture, said resilient means biasing said first prong member against said rear edge of said second receiving aperture in response to subsequent release of said push button to lock said barrel member in said second position; said second prong member engaging said front edge of said second receiving aperture in response to forward pressure applied to said push button when said barrel member is in said second position causing said arm member to yieldingly urge said first prong member back into said housing, said resilient means urging said barrel member back to said first position upon subsequent release of said push button causing said arm member to project said first prong member back into first receiving aperture.

Claim 21

A retractable needle/syringe device according to claim 11, wherein said plunger means comprises: a second seal member slidably received within said ampule in opposed placement to said first seal member, said second seal member movable toward said first seal member to force said medicament out of said ampule; and a plunger member slidably received within said barrel member in fixed engagement with said second seal member, said plunger member connected to an operator arm projecting out of said housing through cooperating elongated apertures formed on said barrel member and said housing, said plunger member responsive to forward pressure applied to said operator arm upon engagement of said ampule with said stop means so as to selectively move said second seal member toward said first seal member, said plunger member being further responsive to back pressure applied to said operator arm so as to draw said ampule backward within said barrel member.

Claim 22

A retractable needle/syringe device according to claim 11, wherein said stop means is provided by said front end portion of said barrel member.

Claim 23

A retractable hypodermic needle/syringe device adapted for use in medicinal injection procedures, comprising: an elongated, substantially tubular housing, said housing having a first end portion and an opposite second end portion, said second end portion having an opening therethrough; a barrel member disposed within said housing and being formed with a front end portion adjacent said second end portion of said housing and a closed back end portion, said barrel member slidably translatable within said housing forwardly from a first position to a second position and back again; a hollow hypodermic needle member disposed adjacent said second end portion of said housing in fixed engagement with said front end portion of said barrel member, said needle formed with a first open end extending into said barrel member and a second open end axially aligned with said opening in said second end portion of said housing, said second open end of said needle passing through said opening and projecting out of said housing upon forward translation of said barrel member to said second position; translation means for forwardly translating said barrel member within said housing from said first position to said second position; locking means cooperating with said translation means for automatically releasably locking said barrel member in said second position and thereby maintaining said second open end of said needle in a projected state without assistance from the user of said device; a coil spring member encircling said needle in abutting alignment between said barrel member and said second end portion of said housing so as to bias said barrel member in said first position, said spring member yieldingly urging said barrel member forwardly to said second position in response to operation of said translation means so as to project said second open end of said needle from said housing, said spring member urging said barrel member back to said first position in response to the release of said locking means such that second open end of said needle fully retracts into said housing; an ampule slidably received within said barrel member in frictional engagement therewith and containing a liquid medicament to be administered to a patient by injection, said ampule formed with a first seal member at one end thereof, said ampule forwardly translatable within said barrel member so as to cause said first open end of said needle to penetrate said first seal member and thereby place said needle in fluid communication with said medicament, said ampule further being backwardly translatable within said barrel member so as to aspirate for blood prior to injecting said medicament; stop means engaging said ampule so as to prevent further forward translation thereof subsequent to said needle establishing said fluid communication with said medicament; and plunger means for forwardly translating said ampule so as to effectuate said fluid communication between said needle and said medicament and backwardly translating said ampule so as to aspirate said needle, said plunger means being adapted to selectively dispense said medicament from said ampule upon engagement of said ampule with said stop means.

Claim 24

A retractable hypodermic needle/syringe device adapted for use in medicinal injection procedures, comprising: an elongated, substantially tubular housing, said housing having a first end portion and an opposite second end portion, said second end portion having an opening therethrough; a barrel member disposed within said housing and being formed with a front end portion adjacent said second end portion of said housing and a closed back end portion, said barrel member slidably translatable within said housing forwardly from a first position to a second position and back again; a hollow hypodermic needle member disposed adjacent said second end portion of said housing in fixed engagement with said front end portion of said barrel member, said needle formed with a first open end extending into said barrel member and a second open end axially aligned with said opening in said second end portion of said housing, said second open end of said needle passing through said opening and projecting out of said housing upon forward translation of said barrel member to said second position; translation means for forwardly translating said barrel member within said housing from said first position to said second position; locking means cooperating with said translation means for automatically releasably locking said barrel member in said second position and thereby maintaining said second open end of said needle in a projected state without assistance from the user of said device; a coil spring member encircling said needle in abutting alignment between said barrel member and said second end portion of said housing so as to bias said barrel member in said first position, said spring member yieldingly urging said barrel member forwardly to said second position in response to operation of said translation means so as to project said second open end of said needle from said housing, said spring member urging said barrel member back to said first position in response to the release of said locking means such that second open end of said needle fully retracts into said housing; an ampule slidably received within said barrel member in frictional engagement therewith and containing a liquid medicament to be administered to a patient by injection, said ampule formed with a first seal member at one end thereof, said ampule forwardly translatable within said barrel member so as to cause said first open end of said needle to penetrate said first seal member and thereby place said needle in fluid communication with said medicament, said ampule further being backwardly translatable within said barrel member so as to aspirate for blood prior to injecting said medicament; stop means engaging said ampule so as to prevent further forward translation thereof subsequent to said needle establishing said fluid communication with said medicament; and plunger means for forwardly translating said ampule so as to effectuate said fluid communication between said needle and said medicament and backwardly translating said ampule so as to aspirate said needle, said plunger means being adapted to selectively dispense said medicament from said ampule upon engagement of said ampule with said stop means.

Claim 25

A retractable hypodermic needle/syringe device adapted for use in medicinal injection procedures, comprising: an elongated, substantially tubular housing, said housing having a first end portion and an opposite second end portion, said second end portion having an opening therethrough; a barrel member slidably received within said housing and being formed with a front end portion adjacent said second end portion of said housing and a closed back end portion, said barrel member slidably translatable within said housing forwardly from a first position to a second position and back again; a hollow hypodermic needle member disposed adjacent said second end portion of said housing in fixed engagement with said front end portion of said barrel member, said needle formed with a first open end extending into said barrel member and a second open end axially aligned with said opening in said second end portion of said housing, said second open end of said needle passing through said opening and projecting out of said housing upon forward translation of said barrel member to said second position; a piston member slidably disposed through said first end portion of said housing in abutting alignment with said back end portion of said barrel member, said piston member formed with a push button portion projecting outwardly of said housing, said piston member translating forwardly within said housing in response to forward pressure applied to said push button so as to move said barrel member from said first position to said second position; locking means cooperating with said piston member for automatically releasably locking said barrel member in said second position and thereby fixedly projecting said second open end of said needle out of said housing, said piston member translating backwardly in response to the release of said locking means so as to allow said barrel member to return to said first position; a coil spring member encircling said needle in abutting alignment between said barrel member and said second end portion of said housing so as to bias said barrel member in said first position, said spring member yieldingly urging said barrel member forwardly to said second position in response to operation of said piston member so as to project said second open end of said needle from said housing, said spring member urging said barrel member back to said first position in response to the release of said locking means such that second open end of said needle fully retracts into said housing; an ampule slidably received within said barrel member in frictional engagement therewith and containing a liquid medicament to be administered to a patient by injection, said ampule formed with a first seal member at one end thereof, said ampule forwardly translatable within said barrel member so as to cause said first open end of said needle to penetrate said first seal member and thereby place said needle in fluid communication with said medicament, said ampule further being backwardly translatable within said barrel member so as to aspirate for blood prior to injecting said medicament; stop means engaging said ampule so as to prevent further forward translation thereof subsequent to said needle establishing said fluid communication with said medicament; and plunger means for forwardly translating said ampule so as to effectuate said fluid communication between said needle and said medicament and backwardly translating said ampule so as to aspirate said needle, said plunger means being adapted to selectively dispense said medicament from said ampule upon engagement of said ampule with said stop means.

Claim 26

A retractable hypodermic needle/syringe device adapted for use in medicinal injection procedures, comprising: an elongated, substantially tubular housing, said housing having a first end portion and an opposite second end portion, said second end portion having an opening therethrough; a barrel member slidably received within said housing and being formed with a front end portion adjacent said second end portion of said housing and a closed back end portion, said barrel member slidably translatable within said housing forwardly from a first position to a second position and back again; a hollow hypodermic needle member disposed adjacent said second end portion of said housing in fixed engagement with said front end portion of said barrel member, said needle formed with a first open end extending into said barrel member and a second open end axially aligned with said opening in said second end portion of said housing, said second open end of said needle passing through said opening and projecting out of said housing upon forward translation of said barrel member to said second position; a piston member slidably disposed through said first end portion of said housing in abutting alignment with said back end portion of said barrel member, said piston member formed with a push button portion projecting outwardly of said housing, said piston member translating forwardly within said housing in response to forward pressure applied to said push button so as to move said barrel member from said first position to said second position; locking means cooperating with said piston member for automatically releasably locking said barrel member in said second position and thereby fixedly projecting said second open end of said needle out of said housing, said piston member translating backwardly in response to the release of said locking means so as to allow said barrel member to return to said first position; a coil spring member encircling said needle in abutting alignment between said barrel member and said second end portion of said housing so as to bias said barrel member in said first position, said spring member yieldingly urging said barrel member forwardly to said second position in response to operation of said piston member so as to project said second open end of said needle from said housing, said spring member urging said barrel member back to said first position in response to the release of said locking means such that second open end of said needle fully retracts into said housing; an ampule slidably received within said barrel member in frictional engagement therewith and containing a liquid medicament to be administered to a patient by injection, said ampule formed with a first seal member at one end thereof, said ampule forwardly translatable within said barrel member so as to cause said first open end of said needle to penetrate said first seal member and thereby place said needle in fluid communication with said medicament, said ampule further being backwardly translatable within said barrel member so as to aspirate for blood prior to injecting said medicament; stop means engaging said ampule so as to prevent further forward translation thereof subsequent to said needle establishing said fluid communication with said medicament; and plunger means for forwardly translating said ampule so as to effectuate said fluid communication between said needle and said medicament and backwardly translating said ampule so as to aspirate said needle, said plunger means being adapted to selectively dispense said medicament from said ampule upon engagement of said ampule with said stop means.

Claim 27

A retractable needle/syringe device according to claim 18, wherein said locking means comprises: a resilient arm member having a first end portion integrated with said piston member and a second end portion angularly biased away from said piston member, said second end portion of said arm member formed with a first prong member and a second prong member, said housing providing first and second receiving apertures to receive said first and second prong members, respectively, when said barrel member is in said first position, said first and second receiving apertures each providing a front edge and a rear edge; said first prong member engaging said front edge of said first receiving aperture in response to forward pressure applied to said push button causing said arm member to yieldingly urge said first prong member into said housing thence project said first prong member into said second receiving aperture, said resilient means biasing said first prong member against said rear edge of said second receiving aperture in response to subsequent release of said push button to lock said barrel member in said second position; said second prong member engaging said front edge of said second receiving aperture in response to forward pressure applied to said push button when said barrel member is in said second position causing said arm member to yieldingly urge said first prong member back into said housing, said resilient means urging said barrel member back to said first position upon subsequent release of said push button causing said arm member to project said first prong member back into said first receiving aperture.

Claim 28

A retractable needle/syringe device according to claim 11, wherein said plunger means comprises: a second seal member slidably received within said ampule in opposed placement to said first seal member, said second seal member movable toward said first seal member to force said medicament out of said ampule; and a plunger member slidably received within said barrel member in fixed engagement with said second seal member, said plunger member connected to an operator arm projecting out of said housing through cooperating elongated apertures formed on said barrel member and said housing, said plunger member responsive to forward pressure applied to said operator arm upon engagement of said ampule with said stop means so as to selectively move said second seal member toward said first seal member, said plunger member being further responsive to back pressure applied to said operator arm so as to draw said ampule backward within said barrel member.

Claim 29

A retractable needle/syringe device according to claim 15, wherein said stop means is provided by said front end portion of said barrel member.