Starting and stopping of hydraulic reciprocating machines

Details Starting and stopping of hydraulic reciprocating machines Starting and stopping of hydraulic reciprocating machines

F - Mech Eng,Light,Heat,Weapons

15

B

F15B 7/00 (2006.01) B25D 9/14 (2006.01) F02M 9/00 (2006.01)

Patent

CA 2148394

This invention relates to a method of starting and stopping the operation of a hydraulic reciprocating machine, a start/stop valve for carrying out the method and to a rock drill including the valve. The reciprocating machine is of the type which includes a piston, a fluid supply chamber and a piston return chamber and the method includes the steps of supplying hydraulic fluid at supply pressure to the fluid supply chamber to move the piston towards the return chamber and then only to the return chamber to start the reciprocation cycle of the machine piston and stopping reciprocation of the piston by terminating the supply of hydraulic fluid to the machine.

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