Self-destructive hypodermic syringe

Details Self-destructive hypodermic syringe Self-destructive hypodermic syringe

1995-04-17

1996-09-17

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604218, 604220, A61M 500

Patent

active

055563848

ABSTRACT:
The present invention is a self-destructive syringe that includes a cylindrical body with a hypodermic needle at one end, a breakable circle, and a retaining ring. The syringe has a piston with a sharp point at the front of the piston. When the piston reaches the lower end of the stroke, the sharp point on the piston perforates the breakable circle while the edges of the piston are encased in the retaining ring. The retaining ring has cutting edges which will damage the seal of the piston if the piston is returned for reuse. A seal, supported by flanges, is positioned at an opposite end of the syringe so as to prevent the piston from reaching the destructive end of the syringe.

REFERENCES:
patent: 3747812 (1973-07-01), Karman et al.
patent: 5180369 (1993-01-01), Dysarz
patent: 5263934 (1994-11-01), Haak
patent: 5290228 (1994-03-01), Uemura et al.

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