Power plants – Pressure fluid source and motor – With control means for structure storing work driving energy
Patent
1996-04-12
1999-11-30
Nguyen, Hoang
Power plants
Pressure fluid source and motor
With control means for structure storing work driving energy
60469, 60494, F16D 3102
Patent
active
059921463
ABSTRACT:
In machines having a bucket that is capable of carrying a load of material, it is well known that when the machine encounters a bump or other obstacle that the effects thereof may result in a shock or jolt being subjected to the machine due to the sudden change in forces acting on the actuator of the lift mechanism. In the subject invention, an accumulator arrangement is connected through a first valve mechanism to the loaded end of an actuator to provide a cushion or damping of the sudden changes in the forces. The first valve mechanism controls the magnitude of the damping in response to the rate of flow between the actuator and the accumulator arrangement. This is accomplished by sensing the pressure drop across a flow restriction mechanism located upstream of the first valve mechanism and controlling the degree of fluid communication between the actuator and the accumulator arrangement in response thereto.
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Burrows J. W.
Caterpillar Inc.
Nguyen Hoang
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