F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
138/41.15
F16H 39/02 (2006.01)
Patent
CA 1150593
Control for Load Sharing Pumps Abstract Conditional exchanging of working fluid between plural fluid circuits having separate supply pumps is provided for without continuously bleeding fluid from the pump control pressure lines. Each cir- cuit has a pump control responsive to a control pres- sure, a plurality of fluid motors, and a group of resolver valves which compare motor pressures and intercommunicate the pump control with the most highly pressurized motor. At times when fluid from one cir- cuit is being delivered to a motor of another circuit, the pressure comparing function of the resolver group of the one circuit is extended to include the motor of the other circuit. Among other uses, the system may be used on excavator vehicles having plural fluid motors performing a variety of different functions. Absence of a bleed in the pump control lines conserves power and enables precise response of the pumps to demand changes.
369983
Caterpillar Tractor Co.
Smart & Biggar
LandOfFree
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