F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
137/27
F04B 49/00 (2006.01) F04D 9/00 (2006.01) F16K 31/18 (2006.01)
Patent
CA 1064366
Abstract of the Disclosure A pumping system intended especially for highly contaminated liquids uses an air pump for selectively drawing liquid into or discharging the liquid from a vessel by creating respectively a vacuum or a pressurized condition within the vessel. A special primary valve device is provided for the system comprising an air filter in combination with a float-actuated, shut-off switch to preclude the entry of air or liquid-borne contaminants into the pump. The float-actuated switch is arranged to disable an engine used for driving the pump. The system also comprises a secondary float valve located between the pump and the primary valve device in case the primary valve device leaks, to preclude the passage of liquid therebetween, the valve having a sight glass to detect leakage liquid and a drain cock to permit drainage of such liquid.
245542
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