Two-stage pressure cylinder

Details Two-stage pressure cylinder Two-stage pressure cylinder

F - Mech Eng,Light,Heat,Weapons

15

B

F15B 15/00 (2006.01) F15B 3/00 (2006.01) F15B 11/032 (2006.01) F15B 11/072 (2006.01)

Patent

CA 2102762

ABSTRACT A two-stage pressure cylinder having a main cylinder with a work piston, and piston rod for contact with a work piece, in which the work piston is movable, an oil cylinder to contain hydraulic fluid, an oil piston in the oil cylinder, an air cylinder, an air piston in the air cylinder, and an air piston rod connected to the air piston and communicating with the hydraulic fluid, a working stroke fluid flow valve allowing hydraulic fluid to pass from the oil cylinder to the main cylinder to operate the work piston, and a reverse stroke flow valve, operable to permit return flow of fluid from the main cylinder into the oil cylinder.

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