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US 3,941,519 AGranted
Pump
OwnerHerbert J. McCauleyinventor
Life of this patent
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OwnerHerbert J. McCauleyinventor
Estimating the term…
A reciprocating type pump has a pair of body members with complementary concave and convex surfaces which clamp a flexible sheet means therebetween to hold the same in curved configuration. The member having the convex surface has a pump chamber opening toward the flexible sheet means and the concave member has inlet and outlet passages opening toward the flexible sheet. The flexible sheet has portions overlying such inlet and outlet passages and the overlying portions have free edge portions extending in the direction of curvature of the flexible sheet and adapted to be flexed toward said convex surface member by fluid pressure from said passages whereby the overlying portions of the flexible sheet are reversely curved under the force of said fluid pressure and return resiliently to original passage closing condition when such pressure is not acting thereagainst.
In an expansible chamber pump, a pair of body members having opposed complementary concave and convex curved faces in transverse cross section, said faces being rectilinear in longitudinal cross section, flexible sheet means clamped between said faces to be held in curved configuration thereby, said convexly curved member having a pump chamber therein and reciprocable means for alternately expanding and contracting the same, said pump chamber opening toward said flexible sheet means, pump inlet and outlet passages in said concavely curved member and opening toward said flexible sheet means, said flexible sheet means having portions overlying said inlet and outlet passage openings, said overlying portions being connected to the flexible sheet means proper but having substantially rectilinear free edge portions extending in the direction of curvature of said flexible sheet means and adapted to be flexed toward said convexly curved member by fluid pressure from said inlet passage toward said pump chamber and by fluid pressure from said pump chamber toward said outlet passage.
Dependencies are inferred from the claim text.