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US 6,662,706 B2Granted
Hydraulic system
AssigneeFinn Corporation
InventorDouglas E. Wysong
Life of this patent
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Abstract
A hydraulic system comprises a variable displacement pump. The hydraulic system includes a first device capable of being hydraulically powered by the pump and a reversing device adapted to cause the first device to autoreverse. The hydraulic system also includes an isolation device adapted to prevent pressure surges resulting from a source other than the first device from actuating the reversing device, thereby preventing undesirable autoreversing of the first device.
Claims35
A hydraulic system comprising:
- a) a variable displacement pump including a pressure flow compensator to adjust flow output of a fluid such that only enough fluid flow is generated to maintain a predetermined pressure drop in the hydraulic system,
- b) a first device capable of being hydraulically powered by the pump,
- c) an actuator adapted to actuate a second device based on a pressure surge from the first device, and
- d) an isolation device adapted to prevent pressure surges resulting from a source other than the first device from actuating the actuator, thereby preventing undesirable actuation of the second device.
1 more element
A hydraulic system comprising:
- a) a variable displacement pump,
- b) a first device capable of being hydraulically powered by the pump,
- c) an actuator adapted to actuate a second device based on a pressure surge from the first device to cause the first device to autoreverse at a predetermined first device resistance torque, and
- d) an isolation device adapted to prevent pressure surges resulting from a source other than the first device from actuating the actuator, thereby preventing undesirable actuation of the second device.
1 more element
A hydraulic system comprising:
- a) a variable displacement pump,
- b) a first device capable of being hydraulically powered by the pump,
- c) an actuator adapted to actuate a second device based on a pressure surge from the first device, wherein the first device is capable of operating in a forward mode or a reverse mode and wherein the actuator is adapted to actuate the second device to cause the first device to autoreverse its operation from the forward mode to the reverse mode, and
- d) an isolation device adapted to prevent pressure surges resulting from a source other than the first device from actuating the actuator, thereby preventing undesirable actuation of the second device.
1 more element
A hydraulic system comprising:
- a) a variable displacement pump,
- b) a first device comprising an airlock discharge assembly capable of being hydraulically powered by the pump,
- c) an actuator adapted to actuate a second device based on a pressure surge from the first device, and
- d) an isolation device adapted to prevent pressure surges resulting from a source other than the first device from actuating the actuator, thereby preventing undesirable actuation of the second device.
1 more element
A hydraulic system comprising:
- a) a variable displacement pump,
- b) a first device capable of being hydraulically powered by the pump,
- c) an actuator adapted to actuate a second device based on a pressure surge from the first device, and
- d) an isolation device comprising a flow divider adapted to prevent pressure surges resulting from a source other than the first device from actuating the actuator, thereby preventing undesirable actuation of the second device.
1 more element
A hydraulic system comprising:
- a) a variable displacement pump,
- b) a first device capable of being hydraulically powered by the pump,
- c) an actuator adapted to actuate a second device based on a pressure surge from the first device, and
- d) an isolation device comprising a pressure compensated flow control valve adapted to prevent pressure surges resulting from a source other than the first device from actuating the actuator, thereby preventing undesirable actuation of the second device.
1 more element
A hydraulic system comprising:
- a) a variable displacement pump,
- b) a first device capable of being hydraulically powered by the pump,
- c) an actuator adapted to actuate a second device based on a pressure surge from the first device,
- d) an isolation device adapted to prevent pressure surges resulting from a source other than the first device from actuating the actuator, thereby preventing undesirable actuation of the second device, and
- e) a third device capable of being hydraulically operated by the pump and wherein the isolation device is adapted to prevent pressure surges resulting from the third device from causing the actuator to actuate the second device.
2 more elements
A hydraulic system comprising:
- a) a variable displacement pump,
- b) a first device capable of being hydraulically powered by the pump,
- c) an actuator adapted to actuate a second device based on a pressure surge from the first device to cause the first device to autoreverse, and
- d) an isolation device adapted to prevent pressure surges resulting from a source other than the first device from actuating the actuator, thereby preventing undesirable actuation of the second device.
1 more element
Dependencies are inferred from the claim text.