Motors: expansible chamber type – Cyclically operable – Working member controlled motive fluid for distributor motor
Patent
1992-06-22
1994-01-11
Look, Edward K.
Motors: expansible chamber type
Cyclically operable
Working member controlled motive fluid for distributor motor
251180, 251304, F01L 2502, F16K 500
Patent
active
052770982
ABSTRACT:
An on-off valve is provided for a rockdrill which is operable by a hydraulic fluid under pressure and which is controlled by a hydraulically biassed valve. The rockdrill is turned on and off by opening and closing the on-off valve. When the valve is turned off hydraulic pressure from an inlet line and a supply pin line to a valve line of the hydraulically biassed control valve is cut off, thereby eliminating the pressure on the supply pin. This interrupts the operating cycle of the control valve and thereby shuts off the operation of the hydraulic drill. When the on-off valve is opened the hydraulic pressure from the inlet line via the supply pin line is re-established to the valve line and to the supply pin, and the operating cycle of the control valve is re-established.
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Lyon Leland H.
Mlasgar Thomas J.
Ingersoll-Rand Company
Look Edward K.
Ryznic John
Selko John J.
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