CARTRIDGE SYRINGE

• US 3,811,441 A
• Filed: 02/10/1972
• Issued: 05/21/1974
• Est. Priority Date: 02/10/1972
• Status: Expired due to Term

• Current Assignee: Stanley J. Sarnoff
• Original Assignee: Stanley J. Sarnoff
• Inventors: Sarnoff, Stanley J.
• Primary Examiner(s): Gaudet, Richard A.
• Assistant Examiner(s): McGowan, J. C.
• Application Number:
  US05/225,200
• Time in Patent Office: 831 Days
• Field of Search: 128/218D,218DA,218F,218R,218C,218NV,218M,220,215,216,2F,DIG.5,218PA 206/43,63.2R
• US Class Current: 604/201
• CPC Class Codes: A61M 2005/2407 from the rear
• CPC Class Codes: A61M 2005/247 with fixed or steady piercing means, e.g. piercing under movement of ampoule
• CPC Class Codes: A61M 2005/2492 via snap connection
• CPC Class Codes: A61M 5/24 Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic ampoules or carpules A61J1/06
• CPC Class Codes: A61M 5/2466 by piercing without internal pressure increase A61M5/2429 takes precedence
• CPC Class Codes: A61M 5/31505 Integral with the syringe barrel, i.e. connected to the barrel so as to make up a single complete piece or unit
• CPC Class Codes: A61M 5/32 Needles; Details of needles pertaining to their connection with syringe or hub infusion needles A61M5/158; Accessories for bringing the needle into, or holding the needle on, the body A61M5/42, A61M5/46 take precedence; guide needles for catheters A61M25/065; Devices for protection of needles apparatus specially adapted for cleaning or sterilising needles A61M5/001
• CPC Class Codes: Y10S 604/90 Telltale showing entry of blood into body inserted conduit

Abstract

A syringe adapted to inject substantial amounts of medicament, the syringe comprising a cylindrical holder having a tapered neck at one end with a central through-bore while the other end is open and provided with a peripheral flange. A cannula assembly is affixed to the tapered neck of the holder and the cannula needle extending through the bore in the holder so that one end of the needle is outside and the other within the holder. The needle has a through-bore with its outer end open and its inner end closed, the needle portion within the holder being provided with a side aperture for communication with the outside. An ampoule is slidably positioned in the holder with its end adjacent and spaced from the needle being provided with an aperture having a pierceable seal and its other end provided with a piston with the medication located therebetween. A latch cap having depending step-wise latches fits over the piston end of the ampoule to retain it within the holder by having the latches engage the holder flange. The latch cap has a central aperture to allow passage therethrough of a plunger threadedly secured to the piston for use in aspirating and injecting the medication.

Claims

1. A syringe comprising in combination, a holder comprising a cylindrical barrel, said barrel having a tapered neck at one end substantially closing said end, said tapered neck having a centrally extending small through-bore, the other and open end of the barrel having an integral locking flange extending peripherally and outwardly therearound, an ampoule slidably fitted Within the barrel, said ampoule comprising a cylindrical body having a reduced opening at one end thereof, a resilient plug closing said opening, a piston slidably positioned in the body near the other open end of the body and in sealing relation thereto, a medicament in the ampoule between the closed end and the piston, sealing means integral with the inner face of the holder barrel adjacent its open end and frictionally engaging the entire periphery of the ampoule body, a latch cap fitting over the open end of the ampoule cylindrical body, said latch cap comprising a circular base having a central opening therethrough, said base having a flat inner face engaging the edge of the open end of the ampoule body, a pair of oppositely disposed latches extending from the latch cap base over the ampoule body and engaging the locking flange on the holder barrel to retain the ampoule in position within the holder, each latch having first and second longitudinally spaced catches, each catch being adapted to engage the locking flange, the first catch being spaced a greater distance from the flat inner face of the cap base than the second catch, a cannula assembly affixed to the closed end of the holder, said assembly comprising a tapered cannula hub, a cannula extending through and secured to said hub, the cannula hub fitting over and secured to the tapered neck of the holder barrel, said cannula having an open end extending outwardly of the hub with the remainder of said needle extending through the through-bore in the holder necked portion into the interior of the holder barrel, the needle end in the barrel being closed, said needle having a lateral opening adjacent its closed end, the ampoule being positioned within the holder barrel so that the resilient plug in its closed end is spaced from the closed end of the cannula, said ampoule being held in such position by means of the latch cap and the sealing means wherein the open end edge of the ampoule body engages the inner flat face of the latch base and the first catch of each latch engages the locking flange, further when the medicament is to be ejected the latch cap is pushed in the direction of the cannula whereby the second catches engage the locking flange to hold the ampoule in a position wherein the cannula has pierced the resilient plug and the side opening in the cannula is in communication with the medicament in the ampoule whereupon the piston may be moved toward the cannula to inject the medicament.