Pumps – Motor driven – Fluid motor
Patent
1990-06-26
1993-02-16
Bertsch, Richard A.
Pumps
Motor driven
Fluid motor
417395, 92 98R, F04B 908
Patent
active
051866153
ABSTRACT:
A diaphragm pump includes upper and lower pump bodies clamping a diaphragm therebetween which separates a driving fluid chamber in the upper body from a pump chamber in the lower body, each body having gripping ridges surrounding the chamber; a driving fluid reservoir in the upper pump body; an outlet check valve having a seat, a closure member and a spring to urge its closure; drive means for alternately pressure loading and unloading the driving fluid chamber; a diaphragm having a central body portion connected to an annular clamping portion by annular webbing; a protruding annular rib inside of the ridges, and sized to bite into the diaphragm before the ridges when the bodies are clamped together; means for adjusting the size of an opening between the driving fluid reservoir and the driving fluid chamber; means for adjusting the distance that the closure member can move away from the seat; a piston assembly including piston received within a cylinder having an upwardly facing sealing surface and adapted to be complementarily received with the upwardly facing sealing surface engaging a downwardly facing sealing surface of the upper pump body, a seal positioned between the two sealing surfaces, and adjustable securement means between the pump body and the cylinder for compressing the seal between the sealing surfaces.
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Bertsch Richard A.
Karldom Corporation
Kocharev Michael I.
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