Power plants – Pressure fluid source and motor – With control means for structure storing work driving energy
Reexamination Certificate
2006-01-30
2008-11-04
Lopez, F. Daniel (Department: 3745)
Power plants
Pressure fluid source and motor
With control means for structure storing work driving energy
C060S413000
Reexamination Certificate
active
07444809
ABSTRACT:
A hydraulic system for a work machine is provided. The hydraulic regeneration system has a tank, a primary source, a first actuator, an accumulator, and a first valve mechanism. The tank is configured to hold a supply of fluid. The primary source is configured to pressurize the fluid and has a suction inlet and a discharge outlet. The first actuator is configured to receive pressurized fluid from the discharge outlet of the primary source. The accumulator is in fluid communication with the tank, the suction inlet of the primary source, and the first actuator. The first valve mechanism is disposed between the suction inlet of the primary source and the accumulator, and is movable between a first position at which fluid returning from the first actuator is directed to the suction inlet of the primary source, and a second position at which fluid returning from the first actuator is directed to only the accumulator.
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Mather Daniel T.
Smith David P.
Caterpillar Inc.
Finnegan Henderson Farabow Garrett & Dunner
Lopez F. Daniel
Shin Caterpillar Mitsubishi Ltd
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