Hypodermic syringe

Details Hypodermic syringe Hypodermic syringe

1989-05-30

1991-09-03

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

050450638

ABSTRACT:
A non-reusable hypodermic syringe is disclosed having a body having a barrel for receiving fluid to be injected including an aperture in the body at the forward end of the syringe, a plunger carrying a piston having a collar thereon and of larger size than the aperture, the collar deformable in a first direction for passage through the aperture and resisting deformation in a second direction for blocking passage through the aperture.

REFERENCES:
patent: 4233975 (1980-11-01), Yerman
patent: 4391272 (1983-07-01), Staempfli
patent: 4863427 (1989-09-01), Cocchi
patent: 4941879 (1990-07-01), Butler et al.

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