F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
138/75, 138/79.1
F15B 11/16 (2006.01) F15B 11/17 (2006.01)
Patent
CA 1085267
Abstract of the Disclosure A control valve of a fluid circuit connecting a first pump to a fluid motor has a signal port in communication with an inlet port when the control valve is at a selected position at which substantially the total output of the first pump is directed to the motor. A valve device connects a second pump to the fluid circuit in response to a valve spool of the control valve being moved to said selected position. The valve device has a valve member, a chamber at one end of the valve member, and biasing means. The valve member is movable between a first position at which the second pump is in communication with a tank and a second position at which the output of the second pump is combined with the output of the first pump in the fluid circuit. The biasing device urges the valve member to the first position and said chamber is connected to the signal port of the control valve.
301984
Caterpillar Tractor Co.
Smart & Biggar
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