Disposable syringe apparatus with retractable needle, locking device and cap device

Claim 1

A syringe apparatus which comprises: a) a substantially cylindrical hollow barrel portion herein described as cylinder having a substantially closed distal end and an open proximal end and having flange shoulder portions extending outwardly form the cylinder surface at the proximal end as a gripping means; b) a body entering conduit at least partially contained within said hollow cylinder portion and at times partially extruding therefrom; c) a means for the frictional sealing at the distal end of the cylinder so that the distal end remains closed after retraction of the body entering conduit; d) a piston assembly movable reciprocally and axially through said cylinder; e) means for detachably connecting the proximal end of the body entering conduit to said piston assembly distal end so that when said conduit and said assembly are connected said piston moves in unison with said body entering conduit; f) means for detachably connecting the distal end of the piston assembly to said proximal end of the body entering conduit so that when said conduit and said assembly are connected said conduit moves in unison with said piston; g) means for anchoring said detachable piston connecting means at said piston assembly distal end; h) means for locking the piston assembly and the attached body entering conduit within the cylinder following retraction of the body entering conduit within the cylinder by reciprocal and axial movement thereof, said means comprising a tapering spiral ribbed cam on the piston; i) said means for locking the piston assembly and the detachably connected body entering conduit within the cylinder following retraction of the body entering conduit within the cylinder further comprising ribbed retainers on the interior of the cylinder allowing for only one way, one time use of the syringe apparatus when engaged with said cam.

Claim 6

A method of retracting a body entering conduit of a syringe following injection and capping said syringe comprising the following steps: a. providing a syringe cap apparatus having a substantially cylindrical hollow portion with means to attach to and detach from the proximal end of the syringe piston; b. detaching said cap; c. placing said cap on a plane surface awaiting receipt of the cylinder; d. providing a syringe apparatus having a substantially cylindrical hollow barrel portion open at the proximal end and substantially closed at the distal end; e. providing a body entering conduit protruding through a sealing device at the distal end of the cylinder and movable to a retracted position within the cylinder: f. providing a piston portion insertable into the hollow of said cylinder portion and movable within said cylinder; g. providing a means for engaging the body entering conduit to the distal end of the piston; h. inserting said piston portion into said cylinder; i. preparing said body entering conduit and piston for injecting fluid to be administered; j. inserting said body entering conduit into the fluid to be administered; k. retracting said piston thus drawing fluid into the area between said body entering conduit and said piston within the cylinder; l. inserting the conduit into patient; m. plunging piston into a position adjacent to body entering conduit thus forcing said fluid into said patient; n. withdrawing body entering conduit from patient; o. engaging devices connecting proximal end of body entering conduit to distal end of piston; p. retracting said conduit until entire body entering conduit is within interior syringe cylinder; q. engaging means comprising a tapering spiral ribbed cam on said piston and ribbed retainers on interior cylinder wall as a means for locking the body entering conduit and piston within the cylinder; r. engaging distal end of cylinder to syringe cap by frictional pressure.

Claim 7

A method of retracting a body entering conduit of a syringe following injection and capping said syringe comprising the following steps: a. providing a syringe cap apparatus having a substantially cylindrical hollow portion with means to attach to and detach from the proximal end of the syringe piston; b. detaching said cap; c. placing said cap on a plane surface awaiting receipt of the cylinder; d. providing a syringe apparatus having a substantially cylindrical hollow barrel portion open at the proximal end and substantially closed at the distal end; e. providing a body entering conduit protruding through a sealing device at the distal end of the cylinder and movable to a retracted position within the cylinder: f. providing a piston portion insertable into the hollow of said cylinder portion and movable within said cylinder; g. providing a means for engaging the body entering conduit to the distal end of the piston; h. inserting said piston portion into said cylinder; i. preparing said body entering conduit and piston for injecting fluid to be administered; j. inserting said body entering conduit into the fluid to be administered; k. retracting said piston thus drawing fluid into the area between said body entering conduit and said piston within the cylinder; l. inserting the conduit into patient; m. plunging piston into a position adjacent to body entering conduit thus forcing said fluid into said patient; n. withdrawing body entering conduit from patient; o. engaging devices connecting proximal end of body entering conduit to distal end of piston; p. retracting said conduit until entire body entering conduit is within interior syringe cylinder; q. engaging means comprising a tapering spiral ribbed cam on said piston and ribbed retainers on interior cylinder wall as a means for locking the body entering conduit and piston within the cylinder; r. engaging distal end of cylinder to syringe cap by frictional pressure.