Injection syringe

Claim 2

An injection syringe for the injection of high viscosity paste or liquid, comprising a frame, a pair of handles mounted to said frame, at least one of which handles is a lever pivotally mounted to said frame incorporating a piston advancing means, an upper and lower cylinder chamber providing fluid connection therebetween, said upper chamber containing an inlet and outlet port, a one way ball-bearing inlet valve seated at the inlet port, a one way ball-bearing outlet valve seated at the outlet port, said lower cylinder chamber containing a piston having means connecting the piston to the piston advancing means on the lever pivot arm, wherein the inlet and outlet ball-bearings have durometers which are chosen to regulate the maximum internal delivery pressure in said upper cylinder chamber, wherein the piston advancing means comprises a semi-circular cam track slidably engaging the piston connecting means for upwardly advancing said piston into said lower piston cylinder chamber as the piston connecting means slides along said cam track so that substantially all of the liquid or paste in the cylinders is forced through the one-way valve in the outlet cylinder chamber.

Claim 3

The injection syringe of claim 1 wherein the upper cylinder chamber projects beyond said frame.

Claim 4

The injection syringe of claim 1 which further includes an end space on the outlet side of the upper cylinder chamber to which an injection cannula can be mounted.

Claim 5

The injection syringe of claim 1 in which the inside diameter of the injection cannula at its end farthest from the end space on the outlet side of the upper cylinder chamber is smaller than the inside diameter of the cylinder.

Claim 6

The injection syringe of claim 4 in which the injection cannula is a needle.

Claim 7

The injection syringe of claim 4 in which the injection cannula is a catheter.

Claim 8

The injection syringe of claim 1 wherein a reservoir of high viscosity fluid or paste is attached by a connecting means to the inlet side of the upper cylinder chamber.

Claim 9

The injection syringe of claim 7 wherein the reservoir connecting means is a luer type connection.

Claim 10

The injection syringe of claim 1 wherein the length of the upper cylinder is a substantial multiple of its diameter.

Claim 11

The injection syringe of claim 1 in which the piston sealingly engages the corresponding piston cylinder wall through an elastomeric O-ring seal.

Claim 12

The injection syringe of claim 1 wherein an extension spring is attached to the pivotally mounted handle so as to provide a retractive force to said handle.

Claim 13

The injection syringe of claim 1 wherein the syringe is manufactured from a plastic material.

Claim 14

The injection syringe of claim 1 wherein the syringe is manufactured from stainless steel.

Claim 15

The injection syringe of claim 1 wherein the one-way inlet and outlet ball-bearing valves are made from a fluoroelastomer material.

Claim 16

A method for introducing high viscosity medicaments into a patient comprising: supplying the injection syringe of claim 1; and charging the syringe by compressing and releasing the handle/lever combination wherein the pumping action provides a vacuum, within the cylinders upon the downstroke of the piston and wherein the outlet ball-bearing valve seals and the inlet ball-valve bearing valve opens thereby charging the syringe; and advancing the medicament through the outlet check valve by a continued pumping action wherein the upstroke of the piston provides compression to the chambers and the inlet check valve seals and the outlet valve opens and the medicament is introduced into a body and restricted from moving back into the syringe.

Claim 17

The method of claim 15 wherein the high viscosity medicament is introduced into a medical endoscope.

Claim 18

The method of claim 15 wherein the high viscosity medicament is a suspension of polytetrafluoroethylene particles in glycerine and polysorbate.

Claim 19

The method of claim 15 wherein the high viscosity medicament is collagen.

Claim 20

The method of claim 15, wherein the outlet port of the injection syringe is connected to a catheter or needle which is then passed through the instrument channel of a medical endoscope and inserted into the body for the treatment of vesicoureteric reflux.

Claim 21

The method of claim 15, wherein the outlet port of the injection syringe is connected to a catheter or needle which is then passed through the instrument channel of a medical endoscope and inserted into the body for the treatment or urinary incontinence.

Claim 22

The method of claim 15, wherein the outlet port of the injection syringe is connected to a catheter or needle which is then inserted into the body for the treatment of emboli in the venous system.

Claim 23

An injection syringe for the injection of high viscosity paste or liquid, comprising a frame, a pair of handles mounted to said frame, at least one of which handles is a lever pivotally mounted to said frame incorporating a piston advancing means, an upper and lower cylinder chamber providing fluid connection therebetween, said upper chamber containing an inlet and outlet port, a one way ball-bearing inlet valve seated at the inlet port, a one way ball-bearing outlet valve seated at the outlet port, said lower cylinder chamber containing a piston having means connecting the piston to the piston advancing means on the lever pivot arm, wherein the inlet and outlet ports are sized relative to their respective ball-bearings to regulate the maximum internal delivery pressure in said upper cylinder chamber, wherein the piston advancing means comprises a semi-circular cam track slidably engaging the piston connecting means for upwardly advancing said piston into said lower piston cylinder chamber as the piston connecting means slides along said cam track so that substantially all of the liquid or paste in the cylinders is forced through the one-way valve in the outlet cylinder chamber.

Claim 24

An injection syringe for the injection of high viscosity paste or liquid, comprising a frame, a pair of handles mounted to said frame, at least one of which handles is a lever pivotally mounted to said frame incorporating a piston advancing means, an upper and lower cylinder chamber providing fluid connection therebetween, said upper chamber containing an inlet and outlet port, a one way ball-bearing inlet valve seated at the inlet port, a one way ball-bearing outlet valve seated at the outlet port, said lower cylinder chamber containing a piston having means connecting the piston to the piston advancing means on the lever pivot arm, wherein the inlet and outlet ports are sized relative to their respective ball-bearings to regulate the maximum internal delivery pressure in said upper cylinder chamber, wherein the piston advancing means comprises a semi-circular cam track slidably engaging the piston connecting means for upwardly advancing said piston into said lower piston cylinder chamber as the piston connecting means slides along said cam track so that substantially all of the liquid or paste in the cylinders is forced through the one-way valve in the outlet cylinder chamber.

Claim 25

The injection syringe of claim 22 wherein the upper cylinder chamber projects beyond said frame.

Claim 26

The injection syringe of claim 22 which further includes an end space on the outlet side of the upper cylinder chamber to which an injection cannula can be mounted.

Claim 27

The injection syringe of claim 22 in which the inside diameter of the injection cannula at its end farthest from the end space on the outlet side of the upper cylinder chamber is smaller than the inside diameter of the cylinder.

Claim 28

The injection syringe of claim 25 in which the injection cannula is a needle.

Claim 29

The injection syringe of claim 25 in which the injection cannula is a catheter.

Claim 30

The injection syringe of claim 22 wherein a reservoir of high viscosity fluid or paste is attached by a connecting means to the inlet side of the upper cylinder chamber.

Claim 31

The injection syringe of claim 28 wherein the reservoir connecting means is a luer type connection.

Claim 32

The injection syringe of claim 22 wherein the length of the upper cylinder is a substantial multiple of its diameter.

Claim 33

The injection syringe of claim 22 in which the piston sealingly engaged the corresponding piston cylinder wall through an elastomeric O-ring seal.

Claim 34

The injection syringe of claim 22 wherein an extension spring is attached to the pivotally mounted handle so as to provide a retractive force to said handle.

Claim 35

The injection syringe of claim 22 wherein the syringe is manufactured from a plastic material.

Claim 36

The injection syringe of claim 22 wherein the syringe is manufactured from stainless steel.

Claim 37

The injection syringe of claim 22 wherein the one-way inlet and outlet ball-bearing valves are made from a fluoroelastomer material.

Claim 38

A method for introducing high viscosity medicaments into a patient comprising: supplying the injection syringe of claim 16; and charging the syringe by compressing and releasing the handle/lever combination wherein the pumping action provides a vacuum within the cylinders upon the downstroke of the piston and wherein the outlet ball-bearing valve seals and the inlet ball-bearing valve opens thereby charging the syringe; and advancing the medicament through the outlet check valve by a continued pumping action wherein the upstroke of he piston provides compression to the chambers and the inlet check valve seals and the outlet valve opens and the medicament is introduced into a body and restricted from moving back into the syringe.

Claim 39

The method of claim 36 wherein the high viscosity medicament is introduced into a medical endoscope.

Claim 40

The method of claim 36 wherein the high viscosity medicament is a suspension of polytetrafluoroethylene particles in glycerine and polysorbate.

Claim 41

The method of claim 36 wherein the high viscosity medicament is collagen.

Claim 42

The method of claim 36, wherein the outlet port of the injection syringe is connected to a catheter or needle which is then passed through the instrument channel of a medical endoscope and inserted into the body for the treatment of vesicoureteric reflux.

Claim 43

The method of claim 36, wherein the outlet port of the injection syringe is connected to a catheter or needle which is then passed through the instrument channel of a medical endoscope and inserted into the body for the treatment or urinary incontinence.

Claim 44

The methods of claim 36, wherein the outlet port of the injection syringe is connected to a catheter and then inserted into the body for the treatment of emboli in the venous system.

Claim 45

An injection syringe for injection of high viscosity pastes or fluids comprising: a frame; a pair of handles mounted to said frame, at least one of which is a lever pivotally mounted to said frame incorporating a piston advancing means, said handles further comprising a grip means which can be squeezed together to move the handles toward one another; a first elongated upper cylinder chamber within said frame comprising: a first end spaced from said frame having a one-way ball-bearing inlet valve whereby a feed of a high viscosity paste or fluid to be discharged can be drawn into said cylinder through said valve which restricts material from moving back into the source of said fluid or paste; and a second end spaced from said frame to which an injection cannula can be mounted and having a one-way ball-bearing outlet valve to restrict material from moving back into the syringe; and an opening to a second elongated lower cylinder piston chamber inter-connecting with said first cylinder chamber and extending into at least one of the handles mounted to said frame; and a piston slidably fitted and sealingly engaging the second lower piston cylinder chamber and extending along the length of the lower cylinder chamber and having means converting the piston to the piston advancing means of said pivotally mounted handle, wherein the piston advancing means comprises a semi-circular cam track slidably engaging the piston connecting means for upwardly advancing said piston into said lower piston cylinder chamber as the piston connecting means slides along said cam track so that substantial all of the liquid placed in the cylinders is forced through the one-way valve and the outlet cylinder chamber.

Claim 46

An injection syringe for injection of high viscosity pastes or fluids comprising: a frame; a pair of handles mounted to said frame, at least one of which is a lever pivotally mounted to said frame incorporating a piston advancing means, said handles further comprising a grip means which can be squeezed together to move the handles toward one another; a first elongated upper cylinder chamber within said frame comprising: a first end spaced from said frame having a one-way ball-bearing inlet valve whereby a feed of a high viscosity paste or fluid to be discharged can be drawn into said cylinder through said valve which restricts material from moving back into the source of said fluid or paste; and a second end spaced from said frame to which an injection cannula can be mounted and having a one-way ball-bearing outlet valve to restrict material from moving back into the syringe; and an opening to a second elongated lower cylinder piston chamber inter-connecting with said first cylinder chamber and extending into at least one of the handles mounted to said frame; and a piston slidably fitted and sealingly engaging the second lower piston cylinder chamber and extending along the length of the lower cylinder chamber and having means converting the piston to the piston advancing means of said pivotally mounted handle, wherein the piston advancing means comprises a semi-circular cam track slidably engaging the piston connecting means for upwardly advancing said piston into said lower piston cylinder chamber as the piston connecting means slides along said cam track so that substantial all of the liquid placed in the cylinders is forced through the one-way valve and the outlet cylinder chamber.

Claim 47

An injection syringe for the injection of high viscosity paste or liquid into a human body, comprising: a frame, a pair of handles mounted to said frame, one of said handles being adapted to be grasped by the fingers of a user's hand and the other handle being adapted to be held in the palm of the user's hand, and wherein at least one of said handles is pivotally mounted to said frame and incorporates a piston advancing means, an upper cylinder chamber containing an inlet port, an outlet port, a one way ball-bearing inlet valve seated at the inlet port, and a one way ball-bearing outlet valve seated at the outlet port, a lower cylinder chamber containing a piston having means connecting the piston to the piston advancing means, wherein the upper and lower cylinder chambers provide fluid connection therebetween and wherein the piston advancing means comprises a semi-circular cam track slidably engaging the piston connecting means for upwardly advancing said piston into said lower piston cylinder chamber as the piston connecting means slides along said cam track so that substantially all of the liquid or paste in the cylinders is forced through the one-way valve in the outlet port of the upper cylinder and a conduit including an initial portion coupled to the outlet port and extending to an end portion, wherein, when in an operative position, the end portion of the conduit is located within the human body for the deposition of high viscosity paste or liquid into a body passage.

Claim 48

An injection syringe for the injection of high viscosity paste or liquid into a human body, comprising: a frame, a pair of handles mounted to said frame, one of said handles being adapted to be grasped by the fingers of a user's hand and the other handle being adapted to be held in the palm of the user's hand, and wherein at least one of said handles is pivotally mounted to said frame and incorporates a piston advancing means, an upper cylinder chamber containing an inlet port, an outlet port, a one way ball-bearing inlet valve seated at the inlet port, and a one way ball-bearing outlet valve seated at the outlet port, a lower cylinder chamber containing a piston having means connecting the piston to the piston advancing means, wherein the upper and lower cylinder chambers provide fluid connection therebetween and wherein the piston advancing means comprises a semi-circular cam track slidably engaging the piston connecting means for upwardly advancing said piston into said lower piston cylinder chamber as the piston connecting means slides along said cam track so that substantially all of the liquid or paste in the cylinders is forced through the one-way valve in the outlet port of the upper cylinder and a conduit including an initial portion coupled to the outlet port and extending to an end portion, wherein, when in an operative position, the end portion of the conduit is located within the human body for the deposition of high viscosity paste or liquid into a body passage.

Claim 49

A method for introducing high viscosity medicaments into a patient comprising: supplying the syringe of claim 44, and charging the syringe by compressing and releasing the handle/lever combination wherein the pumping action provides a vacuum within the cylinders upon the downstroke of the piston and wherein the outlet ball-bearing valve seals and opens, thereby charging the syringe; and introducing the conduit into a human body such that the end portion of the conduit is located within a desired body passage; and advancing the medicament through the outlet check valve by a continued pumping action wherein the upstroke of the piston seals and the outlet valve opens and the medicament is introduced into the human body through the end portion of the conduit and, wherein the medicament is restricted from moving back into the syringe.