One handed retractable safety syringe

Patent 4973316 Issued on November 27, 1990. Estimated Expiration Date:

January 16, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Cannula insertion set with safety retracting needle
Patent #: 4747831
Issued on: 05/31/1988
Inventor: Kulli

Safe needle system for collecting fluids
Patent #: 4838863
Issued on: 06/13/1989
Inventor: Allard , et al.

Button activated automatic needle sheath for disposable syringe
Patent #: 4850977
Issued on: 07/25/1989
Inventor: Bayless

Safety syringe Patent #: 4874382
Issued on: 10/17/1989
Inventor: Lindemann, et al.

Inventor

Dysarz, Edward D.

Application

No. 466722 filed on 01/16/1990

US Classes:

604/195, Portion of body entering conduit stored in material receiving syringe reservoir604/110, Having means for preventing reuse of device604/198Cover or protector for body entering conduit movable axially relative to one another

Examiners

Primary: Yasko, John D.

International Class

A61M 005/32

Abstract

A disposable hypodermic syringe having a needle fixed to a piston assembly. The piston assembly is held within the barrel of said hypodermic syringe by a compressed spring and a trigger. When said trigger is disengaged with said piston assembly said spring pushed said piston assembly and said needle into said barrel of said hypodermic syringe and holds said needle fixed to said piston assembly within said barrel thus preventing any accidental injection of bacteria, virus or other undesirable material into others. The disengagement of said trigger with said piston assembly is accomplished with only one and the same hand that is used to inject the needle of the syringe into a body.