Importance

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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.

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First Claim