Locking system for hypodermic syringes

Details Locking system for hypodermic syringes Locking system for hypodermic syringes

1994-07-05

1995-09-26

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604218, A61M 500

Patent

active

054530920

ABSTRACT:
A locking system for hypodermic syringes including a barrel and pistons where the barrel contains a plurality of detentes surrounding the piston in the "full in" position. A floating ring slides in a channel on the piston, restraining the detentes from engaging the piston head in the packaged position. In use the floating ring slides away from the piston head allowing the detentes to secure the piston in the "full in" position. Subsequent attempts to withdraw the piston will disengage the piston shaft form the piston.

REFERENCES:
patent: 4713056 (1987-12-01), Butterfield
patent: 4878899 (1989-11-01), Plouff
patent: 4932941 (1990-06-01), Min et al.
patent: 4973316 (1990-11-01), Dysarz
patent: 5019044 (1991-05-01), Tsao
patent: 5021047 (1991-06-01), Movern
patent: 5045063 (1991-09-01), Spielberg
patent: 5308331 (1994-05-01), Avila et al.

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