F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
103/32
F04B 49/00 (2006.01) F04B 53/06 (2006.01) F04B 53/10 (2006.01) F16K 24/00 (2006.01)
Patent
CA 1241230
ABSTRACT OF THE DISCLOSURE The pump has a pumping chamber with a deflectable diaphragm member and fluid inlet and outlet passages. A deflectable valve flap is disposed across the fluid inlet passage and another flexible valve flap is disposed across the fluid outlet passage. Movement of the flexible valve flaps is responsive to movement of the flexible diaphragm member, reciprocation of which establishes alternate sequential suction and discharge conditions. An air chamber pro- vided in the pump receives outside air through an air vent opening and also communicates with the pump discharge passage through a bleed hole when the outlet passage is closed by the outlet valve flap. The outlet valve flap is also deflectable to a position where it closes the bleed hole. Under this arrangement, continuous siphon- in of fluid through the pump after the pump has been shut down is obviated. In the event that an obstruction occurs at the dis- charge section of the pump the outlet valve flap will move to a position intermediate the outlet passage and the bleed hole thereby permitting discharged fluid to bypass the discharge section of the pump and return to an inlet supply portion of the pump.
462762
Crompton Co./cie
Gowling Lafleur Henderson Llp
LandOfFree
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