Large capacity syringe

Claim 2

A syringe adapted to inject substantial amounts of medicament, said syringe comprising a cylindrical syringe barrel having a rear open end and a forward end provided with internal threads, a cylindrical cartridge body slidably carried within said barrel, said cartridge body having a rear open end and a necked portion at the forward end, a plunger slidably carried within the cartridge body, a stopper mounted in the necked end of the cartridge body to form a closed medicament chamber between said stopper and the plunger, retaining means on the rear end portion of the syringe barrel to retain the cartridge body within the barrel and the plunger within the cartridge body, the improvement comprising: a cannula mounting body member having a threaded section threadedly engaging the internal threads on the forward end of the syringe barrel so as to fixedly position said body member in the forward end of said barrel, a needle support integral with and extending rearwardly from the cannula mounting body member, a hollow needle affixed to the needle support with its free end spaced from the cartridge stopper, cooperating means on the necked portion of the cartridge and the needle support to provide sterility of the needle and to maintain relative position of the needle with respect to the cartridge stopper, a cannula hub mounting portion integral with and extending forwardly from the body member, said cannula hub mounting portion comprising an integral forwardly extending outer sleeve having internal threads thereon, an integral inner sleeve within said outer sleeve, a cannula having a hub with an annular peripheral flange thereon, the cannula hub fitting over the inner sleeve with the hub flange engaging the internal threads on the outer sleeve, a passage connecting tHe needle and the cannula, said inner sleeve forming a portion of the passage connecting the needle and the cannula, and a cannula sheath covering the cannula and snugly engaging the outer surface of the outer sleeve of the cannula hub mounting portion to form a sterile seal so as to maintain sterile integrity of the cannula.

Claim 3

A syringe adapted to inject substantial amounts of medicament, said syringe comprising a cylindrical syringe barrel having a rear open end and a forward end provided with internal threads, a cylindrical cartridge body slidably carried within said barrel, said cartridge body having a rear open end and a necked portion at the forward end, a plunger slidably carried within the cartridge body, a stopper mounted in the necked end of the cartridge body to form a closed medicament chamber between said stopper and the plunger, retaining means on the rear end portion of the syringe barrel to retain the cartridge body within the barrel and the plunger within the cartridge body, the improvement comprising: a cannula mounting body member having a threaded section threadedly engaging the internal threads on the necked portion of the syringe barrel so as to fixedly position said body member in the necked portion of said barrel, a cap fitting over and secured to the necked portion of the cartridge body, said cap having a cylindrical sleeve extending forwardly and coaxially with the longitudinal axis of the cartridge body, a cylindrical needle support extending from the rearward side of the body member and slidably fitting within the cap sleeve, a hollow needle affixed to the outer end of the support with its free end spaced from the stopper, cooperating positioning means on the needle support and cap sleeve to maintain the relative position of the needle and the stopper, a cannula hub mounting portion integral with and extending forwardly from the body member, said cannula hub mounting portion including an integral and forwardly extending sleeve, a cannula with a hub at one end thereof for the forward end of the syringe, interengaging means on the cannula hub and the forwardly extending sleeve securing the cannula to the cannula hub mounting portion, a passage connecting the needle and cannula, and a cannula sheath covering the cannula and snugly engaging the forwardly extending sleeve to form a sterile seal so as to maintain sterile integrity of the cannula.

Claim 4

A syringe adapted to inject substantial amounts of medicament, said syringe comprising a cylindrical syringe barrel having a rear open end and a forward end provided with internal threads, a cylindrical cartridge body slidably carried within said barrel, said cartridge body having a rear open end and a necked portion at the forward end, a plunger slidably carried within the cartridge body, a stopper mounted in the necked end of the cartridge body to form a closed medicament chamber between said stopper and the plunger, retaining means on the rear end portion of the syringe barrel to retain the cartridge body within the barrel and the plunger within the cartridge body, the improvement comprising: a cannula mounting body member having a threaded section threadedly engaging the internal threads on the necked portion of the syringe barrel so as to fixedly position said body member in the necked portion of said barrel, a cap fitting over and secured to the necked portion of the cartridge body, said cap having a cylindrical sleeve extending forwardly and coaxially with the longitudinal axis of the cartridge body, a cylindrical needle support extending from the rearward side of the body member and slidably fitting within the cap sleeve, a hollow needle affixed to the outer end of the support with its free end spaced from the stopper, cooperating positioning means on the needle support and cap sleeve to maintain the relative position of the needle and the stopper, a cannula hub mounting portion integral with and extending forwardly from the body member, said cannula hub mounting portion including an integral and forwardly extending sleeve, a cannula with a hub at one end thereof for the forward end of the syringe, interengaging means on the cannula hub and the forwardly extending sleeve securing the cannula to the cannula hub mounting portion, a passage connecting the needle and cannula, and a cannula sheath covering the cannula and snugly engaging the forwardly extending sleeve to form a sterile seal so as to maintain sterile integrity of the cannula.

Claim 5

A syringe adapted to inject substantial amounts of medicament, said syringe comprising a cylindrical syringe barrel having a rear open end and a necked forward end provided with internal threads, a cylindrical cartridge body slidably carried within said barrel, said cartridge body having a rear open end and a necked portion at the forward end, a plunger slidably carried within the cartridge body, a stopper mounted in the necked end of the cartridge body to form a closed medicament chamber between said stopper and the plunger, a flange on the rear end portion of the syringe barrel, and a retaining clip fitting over the rear end of the barrel and secured to the flange to retain the cartridge body and plunger within the barrel, the improvement comprising: a cannula mounting body member having a threaded section threadedly engaging the internal threads on the necked portion of the syringe barrel so as to fixedly position said body member in the necked portion of said barrel, a cap fitting over and secured to the necked portion of the cartridge body, said cap having a cylindrical sleeve extending forwardly and coaxially with the longitudinal axis of the cartridge body, a cylindrical needle support integral with and extending from the rearward side of the body member and slidably fitting within the cap sleeve, a hollow needle affixed to the outer end of the support with its free end spaced from the stopper, cooperating sealing means on the cylindrical sleeve and needle support to maintain sterility of the needle, a cannula hub mounting portion integral with and extending forwardly from the boDy member, said cannula hub mounting portion comprising an integral forwardly extending outer sleeve having internal threads therein, an integral inner sleeve within said outer sleeve, a cannula having a hub with an annular peripheral flange thereon, the cannula hub fitting over the inner sleeve with the hub flange engaging the internal threads on the outer sleeve, a passage connecting the needle and the cannula, said inner sleeve forming a portion of the passage connecting the needle and the cannula, and a cannula sheath covering the cannula and snugly engaging the outer surface of the outer sleeve of the cannula hub mounting portion to form a sterile seal so as to maintain sterile integrity of the cannula.

Claim 6

A syringe adapted to inject substantial amounts of medicament, said syringe comprising a cylindrical syringe barrel having a rear open end and a necked forward end provided with internal threads, a cylindrical cartridge body slidably carried within said barrel, said cartridge body having a rear open end and a necked portion at the forward end, a plunger slidably carried within the cartridge body, a stopper mounted in the necked end of the cartridge body to form a closed medicament chamber between said stopper and the plunger, a flange on the rear end portion of the syringe barrel, and a retaining clip fitting over the rear end of the barrel and secured to the flange to retain the cartridge body and plunger within the barrel, the improvement comprising: a cannula mounting body member having a threaded section threadedly engaging the internal threads on the necked portion of the syringe barrel so as to fixedly position said body member in the necked portion of said barrel, a cap fitting over and secured to the necked portion of the cartridge body, said cap having a cylindrical sleeve extending forwardly and coaxially with the longitudinal axis of the cartridge body, a cylindrical needle support integral with and extending from the rearward side of the body member and slidably fitting within the cap sleeve, a hollow needle affixed to the outer end of the support with its free end spaced from the stopper, cooperating sealing means on the cylindrical sleeve and needle support to maintain sterility of the needle, a cannula hub mounting portion integral with and extending forwardly from the boDy member, said cannula hub mounting portion comprising an integral forwardly extending outer sleeve having internal threads therein, an integral inner sleeve within said outer sleeve, a cannula having a hub with an annular peripheral flange thereon, the cannula hub fitting over the inner sleeve with the hub flange engaging the internal threads on the outer sleeve, a passage connecting the needle and the cannula, said inner sleeve forming a portion of the passage connecting the needle and the cannula, and a cannula sheath covering the cannula and snugly engaging the outer surface of the outer sleeve of the cannula hub mounting portion to form a sterile seal so as to maintain sterile integrity of the cannula.

Claim 7

The invention as set forth in claim 3 and wherein the outer sleeve of the cannula hub mounting portion is provided with an enlarged section immediately adjacent the threaded portion of the cannula mounting body member, said enlarged section having outer surfaces thereon for wrench engagement.

Claim 8

The invention as set forth in claim 3 and wherein a plunger rod is secured to the plunger and fits through the retaining clip.

Claim 9

The invention as set forth in claim 3 and wherein the retaining member comprises a sheath fitting over the rear end of the cartridge body and extending forwardly on both sides thereof whereby the sheath edge on the inner side of the cartridge body will abut the plunger.