Double acting, two-stage pump

Details Double acting, two-stage pump Double acting, two-stage pump

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 19/22 (2006.01) F04B 5/02 (2006.01) F04B 11/00 (2006.01) F04B 15/00 (2006.01) F04B 53/12 (2006.01)

Patent

CA 2379641

A reciprocating pump includes a housing, a piston slideably mounted within the housing for a reciprocating movement, a shaft connected to the piston and adapted for reciprocating movement concurrently with the piston, an inlet valve, a discharge valve, and an interstage valve means. A first chamber on one side of the piston is in fluid communication with an inlet and a second chamber on the opposite side of the piston is in fluid communication with a discharge, and the first and second chambers are in fluid communication. At least part of the shaft is in the second chamber. The interstage valve means, which controls the fluid flowing from the first chamber to the second chamber, is closed during a suction stroke and is open during a compression stroke.

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