Separator disc and hypodermic syringe incorporating the same and

Details Separator disc and hypodermic syringe incorporating the same and Separator disc and hypodermic syringe incorporating the same and

1982-04-22

1984-03-20

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

A61M 518

Patent

active

044378580

ABSTRACT:
A self-displacing separator disc is positioned transversely of a tubular member to form a seal in the bore of the member, which may be a hypodermic syringe, to provide two or more separate chambers containing material which is to be kept separated until use thereof. The separator disc is constructed to respond differentially to force or pressure on one side thereof by having peripheral regions of different frictional response with respect to the bore wall such that the disc is displaced out of a transverse orientation upon exposure to force or pressure. Various different structures of discs are described to achieve self-displacement of the disc in a bore which preferably has a uniform internal diameter along its effective length.

REFERENCES:
patent: 2268994 (1942-01-01), Smith
patent: 3494359 (1970-02-01), Zackheim
patent: 3563415 (1971-02-01), Ogle
patent: 3809225 (1974-05-01), Coche
patent: 4254768 (1981-03-01), Ty

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