Dual capacity fluid pump

Details Dual capacity fluid pump Dual capacity fluid pump

F - Mech Eng,Light,Heat,Weapons

04

B

103/22

F04B 23/04 (2006.01) F04C 23/00 (2006.01) F16H 41/30 (2006.01)

Patent

CA 2022841

89019-AEI BAEI 0101 PUS ABSTRACT A dual capacity pump having at least two gear pump stages with a common fluid inlet passage, each pump stage having a discharge port, the discharge port for one stage communicating with a fluid pressure load through a flow delivery passage and the discharge port for the other stage communicating with the flow delivery passage through a one-way flow valve, and speed responsive flow control valve means for connecting the discharge side of the other stage to the common fluid inlet passage during operation in a first operating range of low driving speeds for the pump and to said flow delivery passage through the one-way flow valve during operation in an operating range of high driving speeds for the pump.

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