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US 4,375,825 AGranted
Integral valve apparatus
OwnerDonald J. Greenspaninventor
Life of this patent
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Abstract
A valve apparatus is integrally molded from an elastomeric material so as to form a valve seating portion including a valve opening, a valve member and connective strands extending from the valve seating portion to the valve member. The valve member is initially molded on one side of the valve opening, and a portion of the valve member is passed through the opening to the other side thereof. The connective strands are stretched while passing a portion of the valve member through the opening so as to create a bias on the valve member which tends to seat the valve member on the other side of the opening.
Claims10
A valve apparatus comprising:
- valve seating means including a valve opening having one side and another side;
- valve means adapted to seat on said valve seating member to close said opening on said one side thereof;
- connective means extending from said valve means to said valve seating means on said other side thereof;
- said valve seating means, said valve means and said connective means comprising an integrally molded elastomeric material, said elastomeric material of said connective means being substantially stretched and maintained under tension such that said connective means bias said valve means against said valve seating member;
- and
- said valve means adapted to be pushed through said opening so as to relieve the tension of said connective means and move away from said valve seating means during opening while substantially stretching and placing further tension on said connective means.
3 more elements
Dependencies are inferred from the claim text.