F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
103/37
F04B 43/04 (2006.01) F04B 43/06 (2006.01)
Patent
CA 1201933
AIR OPERATED DIAPHRAGM PUMP SYSTEM ABSTRACT OF THE DISCLOSURE An air-operated diaphragm pump assembly for with- drawing small volumes of liquid from a receptacle until the receptacle is almost completely emptied. The pump assembly includes a diaphragm pump that is submerged within the liquid in one receptacle, an extension sleeve extending upwardly from the pump to a position above the receptacle, fluid logic circuitry to operate the pump, inlet conduit(s) passing through the sleeve to transmit control pulses to the pump, and outlet conduit(s) passing through the sleeve to discharge the liquid forced out of the pump in response to the control pulses. The fluid logic circuitry includes a pneumatic Schmitt-Trigger that is operatively associated with a pneumatic inverter. The diaphragm pump includes a pumping diaphragm and a driving diaphragm, the diaphragms being coupled together to drive a displacer within a pumping chamber in response to a pressure differential to thereby expel the liquid contained therein.
429651
Atofina Chemicals Inc.
Fetherstonhaugh & Co.
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