Safety syringe

• US 20050171486A1
• Filed: 03/31/2005
• Published: 08/04/2005
• Est. Priority Date: 05/10/1999
• Status: Abandoned Application

• Current Assignee: Mark N. Hochman
• Original Assignee: Mark N. Hochman
• Inventors: Hochman, Mark N.
• Application Number:
  US11/095,369
• Publication Number:
  US 20050171486A1
• Time in Patent Office: Days
• US Class Current: 604/218
• CPC Class Codes: A61M 2005/2407 from the rear
• CPC Class Codes: A61M 2005/2492 via snap connection
• CPC Class Codes: A61M 2005/3139 Finger grips not integrally formed with the syringe barrel, e.g. using adapter with finger grips
• CPC Class Codes: A61M 2005/3289 with rotation of the needle, e.g. to ease penetration
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 2205/586 Ergonomic details therefor, e.g. specific ergonomics for left or right-handed users
• CPC Class Codes: A61M 5/00 Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests vaccination appliances for veterinary use A61D1/025 ; tube connectors, tube couplings, valves or branch units specially adapted for medical use A61M39/00; containers specially adapted for medical or pharmaceutical purposes A61J1/00; combinations of vial and syringe for mixing or transferring their contents A61J1/20; holders for containers for collecting, storing or administering blood or medical fluids A61J1/16
• 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 5/3257 Semi-automatic sleeve extension, i.e. in which triggering of the sleeve extension requires a deliberate action by the user, e.g. manual release of spring-biased extension means
• CPC Class Codes: A61M 5/3271 with guiding tracks for controlled sliding of needle protective sleeve from needle exposing to needle covering position
• CPC Class Codes: A61M 5/3287 Accessories for bringing the needle into the body; Automatic needle insertion A61M5/20, A61M5/31525 take precedence
• CPC Class Codes: A61M 5/422 Desensitising skin
• CPC Class Codes: B01J 19/0046 Sequential or parallel reactions, e.g. for the synthesis of polypeptides or polynucleotides; Apparatus and devices for combinatorial chemistry or for making molecular arrays synthesis methods per se C40B50/00
• CPC Class Codes: B01J 2219/00313 the reactor vessels being formed by arrays of wells in blocks
• CPC Class Codes: B01J 2219/00364 Pipettes
• CPC Class Codes: B01J 2219/00389 Feeding through valves
• CPC Class Codes: B01J 2219/00394 in multiple arrangements
• CPC Class Codes: B01J 2219/00495 Means for heating or cooling the reaction vessels
• CPC Class Codes: B01J 2219/00585 Parallel processes
• CPC Class Codes: B01J 2219/00698 Measurement and control of process parameters
• CPC Class Codes: B01J 2219/00707 : separated from the reactor apparatus
• CPC Class Codes: B01J 2219/0072 : Organic compounds
• CPC Class Codes: C40B 60/14 : for creating libraries

Abstract

A safety syringe is formed of an inner sleeve receiving a cartridge with liquid, an outer sleeve through which said inner sleeve is telescopically reciprocated, and a plunger assembly that is attached to the inner sleeve and used to eject the liquid. The needle is mounted on a front end of the inner sleeve and in a retracted position is wholly contained within the outer sleeve while in a protracted position the needle is exposed so that it can be used for an injection. Advantageously, in one embodiment, the inner sleeves can rotate with respect to each other causing the needle to rotate both when the needle is extended and when is retracted into the outer sleeve. Another feature of the invention is that in one embodiment the inner sleeve has an internal puncture member for puncturing the cartridge. Therefore, instead of a dental needle with two sharp tips, a standard needle with a single tip and a Luer connection may be used.

Claims

1. A safety syringe comprising:

a plunger assembly including a rod;

an inner sleeve sized and shaped to receive a cartridge with liquid and said plunger assembly, said plunger assembly being adapted to force the liquid from said cartridge when said rod is moved with respect to said inner sleeve, said inner sleeve having a front end adapted to receive a needle, said needle being in communication with said cartridge to receive said liquid;

an outer sleeve telescopically receiving said inner sleeve; and

a stop mechanism adapted to permanently retain said inner sleeve within said outer sleeve while allowing said inner sleeve to slide telescopically within said outer sleeve.

2. The safety syringe of claim 1 further comprising a first intermittent lock means for locking said inner and outer sleeves in a first position and a second intermittent lock means for locking said inner and outer sleeve in a second position, said sleeves being prevented from moving telescopically with respect to each other when one of said first and second lock means is active.

3. The safety syringe of claim 2 wherein said lock means includes a pivoting lever disposed on said outer sleeve and respective first and second lever engagement members associated with said inner sleeve.

4. The safety syringe of claim 1 wherein said outer sleeve is formed with a circumferential collar.

5. The safety syringe of claim 4 wherein said rod further includes a finger ring, said finger ring cooperating with said collar to cause said rod to eject liquid from said cartridge through said needle when said finger ring and collar are manually squeezed together.

6. The safety ring of claim 1 wherein said rod has a rod end received in said cartridge for ejecting said liquid, and at least O-ring mounted on said rod end and arranged to stabilize said rod end as it reciprocates through said cartridge.

7. A safety syringe comprising:

a plunger assembly including a rod;

an inner sleeve with a front end adapted to receive a needle and a rear end with a mouth for receiving a cartridge with a liquid, said liquid being ejected through said needle when said rod is inserted into said cartridge within said inner sleeve;

an outer sleeve cooperating with said inner sleeve to define a retracted and a protracted position, wherein said needle is exposed in said protracted position and is fully contained within said outer sleeve in said retracted position;

an actuating mechanism telescopically and selectively moving said inner sleeve with respect to said outer sleeve between protracted and retracted positions; and

a rotation mechanism simultaneously rotating said inner and outer sleeves with respect to each other as said inner and outer sleeves move between said positions, said needle rotating with said inner sleeve.

8. The syringe of claim 7 further comprising a spring urging said sleeves toward said protracted position.

9. The syringe of claim 7 further comprising a first lock intermittently locking said sleeves in said protracted position, and a second lock intermittently locking said sleeves in said retracted position.

10. The syringe of claim 9 wherein said first and second lock includes a lever disposed on said outer sleeve and first and second lever engaging holes formed in said inner sleeve.

11. The syringe of claim 10 further comprising a spring urging said sleeves toward said retracted position, wherein said sleeves are moved automatically to said protracted position, when said sleeves are in said protracted position and said lever is released.

12. The syringe of claim 7 further comprising a permanent lock that when activated immobilizes said needle within said outer sleeve.

13. The syringe of claim 12 wherein said permanent lock includes a tab formed on said outer sleeve and a frangible member that deforms when said tab is pressed to cause said tab to permanently engage said inner sleeve.

14. A safety syringe comprising:

a plunger assembly including a rod;

an inner sleeve with a front end adapted to receive a needle and a rear end with a mouth for receiving a cartridge with a liquid, said liquid being ejected through said needle when said rod is inserted into said cartridge within said inner sleeve;

an outer sleeve cooperating with said inner sleeve to define a retracted and a protracted position, wherein said needle is exposed in said protracted position and is fully contained within said outer sleeve in said retracted position;

an actuating mechanism telescopically and selectively moving said inner sleeve with respect to said outer sleeve between protracted and retracted positions; and

an aspiration mechanism automatically providing aspiration when said actuating mechanism is released.

15. The syringe of claim 14 wherein said aspiration mechanism includes a flexible member that urges said cartridge away from said front end.

16. The syringe of claim 15 wherein said flexible member is coil spring.

17. The syringe of claim 15 wherein said flexible member is a plastic member formed integrally in said inner sleeve.

18. The syringe of claim 15 wherein said sleeves are formed with elongated windows arranged and constructed to allow cartridge removal, venting and direct viewing of the cartridge contained therein.

19. A safety syringe comprising:

a plunger assembly including a rod;

an inner sleeve with a front end adapted to receive a needle and a rear end with a mouth for receiving a cartridge with a liquid, said liquid being ejected through said needle when said rod is inserted into said cartridge within said inner sleeve, said inner sleeve including an inner member arranged to puncture said cartridge when said cartridge is inserted into inner sleeve, said inner sleeve further including a threaded member disposed at said front end to receive a needle, said threaded member and said puncture member cooperating to provide liquid from said cartridge to said needle without said needle extending into said inner sleeve;

an outer sleeve cooperating with said inner sleeve to define a retracted and a protracted position, wherein said needle is exposed in said protracted position and is fully contained within said outer sleeve in said retracted position; and

an actuating mechanism telescopically and selectively moving said inner sleeve with respect to said outer sleeve between protracted and retracted positions.

20. The syringe of claim 19 wherein said puncture member is a hollow spike.

21. The syringe of claim 19 wherein said threaded member is a Luer lock adapted to accept a needle with matching Luer connector.