Power plants – Pressure fluid source and motor – Condition responsive control of pump or motor displacement
Patent
1985-11-12
1988-10-25
Garrett, Robert E.
Power plants
Pressure fluid source and motor
Condition responsive control of pump or motor displacement
60462, 91446, 137495, F15B 1116, F15B 1518, F16K 3114
Patent
active
047794194
ABSTRACT:
A pressure-compensated flow-control valve with an adjustable limiting device controls the maximum speed of a fluid motor and eliminates an additional valving element found in prior art device. The flow control valve includes a flow limiting throttle opening integral with the flow control spool. The spool can be selectively rotated to adjust the effective size of the throttle opening thereby limiting flow through the valve. The spool establishes a constant rate of flow determined by the throttle opening or a directional control valve. By incorporation of the flow limiting function within the flow control spool, the overall cost and complexity of the pressure compensated flow control valve is reduced.
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Pippenger, J. J., et al., Fluid Power Controls, New York, N.Y.: McGraw-Hill Book Co., Inc., 5/1959, pp. 78-80.
Yeaple, F., Fluid Power Design Handbook, New York, N.Y.: Marcel Dekker, Inc., 5/1984, pp. 233-235.
Caterpillar Inc.
Garrett Robert E.
Grant John W.
Kapsalas George
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