Disposable syringe apparatus with retractable needle, locking de

Details Disposable syringe apparatus with retractable needle, locking de Disposable syringe apparatus with retractable needle, locking de

1990-03-26

1991-11-19

Yasko, John D.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604195, 604218, A61M 550

Patent

active

050662813

ABSTRACT:
A disposable syringe apparatus with retractable body entering conduit which reduces the frequency of accidental needle strikes to health care workers and prevents health-threatening reuse of the syringe by drug abusers. The device includes a cylinder having an open proximal end, a closed distal end, and a body entering conduit projecting through the distal end. A piston assembly is included having a member at its distal end for engaging the aperture at the proximal end of the body entering conduit following expulsion of fluid materials. The piston is then withdrawn proximally through the cylinder relocating the body entering conduit fully within the interior of the cylinder. The body entering conduit and piston are locked in place by a member for a tapering cam on the exterior of the piston and retainers on the interior of the cylinder. The distal end of cylinder is then frictionally engaged in the syringe cap as it awaits on a plane surface thereby rendering the body entering conduit permanently irretrievable and the cylinder aperture safely locked closed.

REFERENCES:
patent: 3107785 (1963-10-01), Roehr
patent: 4731068 (1988-03-01), Hesse
patent: 4804370 (1989-02-01), Haber et al.
patent: 4826483 (1989-05-01), Molnar, IV
patent: 4832694 (1989-05-01), Raphael, III et al.
patent: 4836373 (1989-06-01), Goldman
patent: 4906231 (1990-03-01), Young
patent: 4908023 (1990-03-01), Yuen
patent: 4932939 (1990-06-01), Magre et al.
patent: 4995874 (1991-02-01), Strickland

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