Enhanced sheath valve

Details Enhanced sheath valve Enhanced sheath valve

1993-06-14

1994-09-27

Weiss, John G.

Surgery

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

Treating material introduced into or removed from body...

604256, A61M 5178

Patent

active

053503635

ABSTRACT:
A valve comprises an elastomeric partition member having first and second opposed faces, the valve being adapted for securement in a housing. Typically, one or both of the faces define a recess of substantially rectangular cross section to reduce the central thickness of the partition member, the recesses being wider than they are deep. The elastomeric partition is typically made of an elastomer having an elongation of 900 to 1500 percent, a tensile strength of at least 11.5 megapascals, a Shore `A` durometer of preferably 45 to 70, and a tear strength of at least 150, as determined by tests described herein. Significant improvements are achieved by slit partition valves which utilize the elastomeric partition member of this invention.

REFERENCES:
patent: 4424833 (1984-01-01), Spector et al.
patent: 4610674 (1986-09-01), Suzuki et al.
patent: 4626245 (1986-12-01), Weinstein
patent: 4798594 (1989-01-01), Hillstead
patent: 4895565 (1990-01-01), Hillstead
patent: 4929235 (1990-05-01), Merry et al.
patent: 4932633 (1990-06-01), Johnson et al.
patent: 5102395 (1992-04-01), Cheer et al.
patent: 5167637 (1992-12-01), Okada et al.
patent: 5176652 (1993-01-01), Littrell
patent: 5242413 (1993-09-01), Heiliger
2 sheets drawings entitled Hemaquet Plus Gasket.

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