Patent ID: 6033191
Filing Date: 2000-03-07
Classification: F04B

Abstract:
A self-filing and self-priming micromembrane pump comprising:a housing, said housing having a wall which serves as a pump chamber wall;a pump membrane;at least one device for shifting said pump membrane between a drained condition and a maximum volume condition;at least one inlet valve and at least one outlet valve; andone pump chamber located between said pump chamber wall and said pump membrane, wherein said pump membrane adjoins said pump chamber wall substantially along its length when said pump membrane is in said drained condition,wherein said at least one inlet valve and said at least one outlet valve comprise: a single piece valve membrane, said valve membrane being separate from and substantially parallel with the pump membrane when in said drained condition, said single piece valve membrane controlling the flow through said at least one inlet valve and said at least one outlet valve; membrane valve seats formed from the structure of the pump housing, and wherein said valve membrane has at least one hole in an area adjacent to each of one said valve seats.