Locking syringe

Details Locking syringe Locking syringe

1991-09-03

1993-11-09

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

052598403

ABSTRACT:
A locking syringe is disclosed which comprises a plunger, a cylinder, and a cap. The plunger includes a proximal end and a distal end having a first set of annular ridges formed thereon. The cylinder comprises an open cylindrical passage and includes a needle attached in a conventional manner at the proximal end thereof. A plurality of annular ridges are formed inside the passageway at the distal end of the cylinder. The ridges in the cylinder engage the annular ridges on the plunger in a snap fit and prevent removal of the plunger from the cylinder after the syringe has been used. The cylinder also includes a plurality of annular ridges formed adjacent the needle. The ridges on the cylinder snap fit into mating annular ridges in the cap to prevent re-use of the needle once the syringe is discarded.

REFERENCES:
patent: 4731068 (1988-03-01), Hesse
patent: 4820272 (1989-04-01), Palmer
patent: 4840616 (1989-06-01), Banks
patent: 4846796 (1989-07-01), Carrell et al.
patent: 4909795 (1990-03-01), Gelabert
patent: 5021047 (1991-06-01), Movern
patent: 5037394 (1991-08-01), Mazurik et al.
Two pages from the U.S. Patent and Trademark Office Official Gazette, Nov. 28, 1989, pp. 1826-1827 listing U.S. Pat. Nos. 4,883,471 and 4,883,470.
Two pages from the U.S. Patent and Trademark Office Official Gazette, Oct. 17, 1989, pp. 1308-1309 listing U.S. Pat. Nos. 4,874,385, 4,874,384, 4,874,383 and 4,874,382.
"Inventor of the Month Announced," Inventors Workshop International, Orange County Chapter Newsletter, Oct. 1990.

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