Syringe

• US 5,891,106 A
• Filed: 06/03/1997
• Issued: 04/06/1999
• Est. Priority Date: 12/09/1994
• Status: Expired due to Fees

• Current Assignee: Medinfodent Limited
• Original Assignee: Medinfodent Limited
• Inventors: Butuzov, Valentin Sergeevich, Chougailov, Igor Alexandrovich
• Primary Examiner(s): YASKO JR, JOHN D
• Application Number:
  US08/849,326
• Time in Patent Office: 672 Days
• Field of Search: 604/209, 604/208, 604/218, 604/239, 604/240, 604/242, 604/243, 604/272, 604/232
• US Class Current: 604/209
• CPC Class Codes: A61M 2005/2407 from the rear
• CPC Class Codes: A61M 2005/2477 comprising means to reduce play of ampoule within ampoule holder, e.g. springs
• CPC Class Codes: A61M 2005/341 angularly adjustable or angled away from the axis of the injector
• 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 5/31515 Connection of piston with piston rod
• CPC Class Codes: A61M 5/31535 Means improving security or handling thereof, e.g. blocking means, means preventing insufficient dosing, means allowing correction of overset dose
• CPC Class Codes: A61M 5/31581 performed by rotationally moving or pivoting actuator operated by user, e.g. an injection lever or handle
• CPC Class Codes: A61M 5/31595 Pre-defined multi-dose administration by repeated overcoming of means blocking the free advancing movement of piston rod, e.g. by tearing or de-blocking
• CPC Class Codes: A61M 5/34 Constructions for connecting the needle , e.g. to syringe nozzle or needle hub connecting catheter tubes to hubs A61M25/0014

Abstract

A syringe having a body connected with a barrel and a fastening unit for fastening of the double-edged needle at the other end. A plunger having ratchet teeth is located in the body. A stopper pawl which prevents return movement of the plunger is installed with a possibility of interaction with the plunger. A drive unit including a rotary handle is fixed on the body and a drive pawl is fixed on the handle. A compensator of a cartridge length is located in the body. A guiding element is positioned between the barrel and the fastening unit. The fastening unit is made in the form of a hollow sphere with a slot and a holder of double-edged needle which is fixed in the slot with the possibility of moving in the slot on the generatrix of a surface of the sphere to an angle up to 180°. An aspiration element is fixed on one end of the plunger. The stopper pawl is installed in the body under the rotary handle behind the drive pawl and the stopper pawl and the drive pawl are fixed with a possibility of runaway from meshing the plunger with the help of the rotary handle. Another end of the plunger is provided with a rest for a finger.

Claims

1. A syringe including a body connected with a barrel, which other end having a fastening unit for fastening of a double-edged needle, a plunger having ratchet teeth and located in the body, a stopper pawl which prevents return movement of the plunger, installed with a possibility of interaction with the plunger, a drive unit including a rotary handle, fixed on the body, and a drive pawl fixed on the handle, characterized in that:

a compensator of a cartridge length is located in the body;

a guiding element is positioned between the barrel and the fastening unit;

which fastening unit is made in the form of a hollow sphere with a slot and a holder of double-edged needle fixed in the slot with the possibility of moving in the slot on the generatrix of a surface of the sphere to an angle up to 180°

;

an aspiration element is fixed on one end of the plunger;

the stopper pawl of the plunger is installed in the body under the rotary handle behind the drive pawl; and

the stopper pawl and the drive pawl are fixed with a possibility of runaway from meshing the plunger with the help of the rotary handle, and wherein another end of the plunger is provided with a rest for a finger.

2. The syringe according to claim 1, wherein the aspiration element is spear like.

3. The syringe according to claim 2, wherein the spear like aspiration element is slit along an axis thereof.

4. The syringe according to claim 1, wherein the aspiration element is mushroom like.

5. The syringe according to claim 1, wherein the aspiration element is removable.