Inlet check valve for pump mechanism
First Claim
1. In combination with a fluid pump having a digitally compressible pump chamber, a check valve disposed in said pump chamber comprising at least two pliable films of synthetic plastic material disposed in superposed relation and having opposed inner surfaces, one of said films having a fluid inlet opening therethrough, said films being sealed together at circumferentially spaced locations outwardly of said inlet opening to define a central fluid chamber with a plurality of branch channels for unidirectional flow of fluid from said inlet opening of the valve into said pump chamber.
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Accused Products
Abstract
An intake valve for use in a thermoplastic fluid pump for inflatable bladders in which the valve is composed of superposed elastomeric layers and one of which is energy sealed at the center thereof to an inner wall portion of the pump about an inlet opening through said layer. The inlet opening is axially aligned with a hole through said pump wall so that ambient air may upon an expansion stroke of the pump enter the valve through said inlet opening and hole in the pump wall. Thereafter when the pump is compressed, air within the pump chamber will seal the inlet opening and force said air into the bladder through a check valve provided therefor. Thereafter when the pump is released, air will again be drawn into the pump chamber through the intake valve.
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Citations
12 Claims
- 1. In combination with a fluid pump having a digitally compressible pump chamber, a check valve disposed in said pump chamber comprising at least two pliable films of synthetic plastic material disposed in superposed relation and having opposed inner surfaces, one of said films having a fluid inlet opening therethrough, said films being sealed together at circumferentially spaced locations outwardly of said inlet opening to define a central fluid chamber with a plurality of branch channels for unidirectional flow of fluid from said inlet opening of the valve into said pump chamber.
- 9. A check valve for use with a fluid pump comprising at least two pliable films of synthetic plastic material disposed in superposed relation and having opposed inner surfaces, one of said films having a fluid inlet opening therethrough, said films being sealed together at circumferentially spaced locations outwardly of said inlet opening to define a central fluid chamber with a plurality of branch channels extending radially therefrom for the unidirectional flow of fluid from said inlet opening of the valve into said pump.
Specification