Fluid operated hydraulic pump

Details Fluid operated hydraulic pump Fluid operated hydraulic pump

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Patent

CA 1047311

FLUID OPERATED HYDRAULIC PUMP ABSTRACT A fluid operated hydraulic pump of the type using air pressure to produce high pressure hydraulic fluid wherein an air pressure driven motor and a hydraulic pump are positioned in adjacent axially aligned relationship and the air motor drives the hydraulic pump, the air motor including a reciprocable check valve for preventing air flow into the pump during the exhaust stroke of the pump thereby increasing the efficiency of the pump and reducing air flow through the pump. The check valve is disposed in the air inlet passage and is positioned in axially aligned relationship and adjacent to a reciprocable shuttle valve controlling exhaust air flow from: the motor. Movement of the shuttle valve to a position permitting air to be exhausted from the air motor chamber also facilitates movement of the reciprocable check valve to a position wherein it prevents air flow into the motor. - 1 -

284325

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