Syringe having a tapered plunger

Details Syringe having a tapered plunger Syringe having a tapered plunger

2005-12-06

2005-12-06

Mendez, Manuel (Department: 3763)

Surgery

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

Treating material introduced into or removed from body...

C604S187000

Reexamination Certificate

active

06972008

ABSTRACT:
Syringes of the invention include a barrel having a tapered outlet portion and a plunger that is conformingly tapered to enter the tapered portion of the barrel and to expel the fluid material contained within the tapered portion of the barrel. To help expel the material from the barrel, the syringes of the invention include sealing means that are configured to seal the stem of the plunger to the barrel. The sealing means may include one or more rings that circumferentially protrude away from the stem and slidably engage the inner surface of the barrel. In certain embodiments, the syringes also include applicator valves that are disposed at the outlet end of the barrel and that can be rotated between open and closed positions to control the flow of the fluid material out of the barrel.

REFERENCES:
patent: 1831668 (1931-11-01), Juhl
patent: 2261213 (1941-11-01), Bierman
patent: 3277922 (1966-10-01), Eisel
patent: 4043336 (1977-08-01), Kreb, III
patent: 4175559 (1979-11-01), Kreb, III
patent: 4679705 (1987-07-01), Hamilton
patent: 4846801 (1989-07-01), Okuda et al.
patent: 4931044 (1990-06-01), Beiter
patent: 5135511 (1992-08-01), Houghton et al.
patent: 5178186 (1993-01-01), Levasseur
patent: 5814017 (1998-09-01), Kashmer
patent: 5951160 (1999-09-01), Ronk
patent: 5989219 (1999-11-01), Villas et al.
U.S. Appl. No. 10/106,397, filed Mar. 26, 2002, Bills.

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