Safety valve plug for disposable pre-filled syringes

Details Safety valve plug for disposable pre-filled syringes Safety valve plug for disposable pre-filled syringes

1995-01-27

1997-07-01

Hafer, Robert A.

Surgery

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

Treating material introduced into or removed from body...

604236, 604228, A61M 5315

Patent

active

056432240

ABSTRACT:
The invention relates to a safety valve plug to be used in pre-filled syringes, of the kind comprising a cylindrical hollow body into which a coaxial plunger is displaced, projecting outwardly from one of the bases; while a conical portion is defined at the opposite base, the conical portion receiving the injection needle and being called "plugging cone", the valve plug being snug fit inside said "plugging cone" with its end head bearing on the mouth thereof, said valve plug comprising a substantially cylindrical solid body having a conical end portion and the other portion, defining its head, being cylindrical and of a cross section larger than the rest of the body; the cylindrical body having, following said conical end, two faceted faces extending adjacent the head.

REFERENCES:
patent: 1179560 (1916-04-01), Reed
patent: 1707880 (1929-04-01), Sheets
patent: 2893390 (1959-07-01), Lockhart
patent: 3850348 (1974-11-01), Bessot et al.
patent: 3941128 (1976-03-01), Baldwin
patent: 4233975 (1980-11-01), Yerman
patent: 4460357 (1984-07-01), Cohen
patent: 4479801 (1984-10-01), Cohen
patent: 4915692 (1990-04-01), Vevlier
patent: 5352203 (1994-10-01), Vallelunga et al.

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