Invention Grant
- Patent Title: Hydraulic system having variable back pressure control
- Patent Title (中): 具有可变背压控制的液压系统
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Application No.: US11092617Application Date: 2005-03-30
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Publication No.: US07210292B2Publication Date: 2007-05-01
- Inventor: Robert J. Price , Francis J. Raab
- Applicant: Robert J. Price , Francis J. Raab
- Applicant Address: US IL Peoria JP
- Assignee: Caterpillar Inc,Shin Caterpillar Mitsubishi Ltd
- Current Assignee: Caterpillar Inc,Shin Caterpillar Mitsubishi Ltd
- Current Assignee Address: US IL Peoria JP
- Agency: Finnegan, Henderson, Farabow, Garrett & Dunner
- Main IPC: F16D31/02
- IPC: F16D31/02

Abstract:
A hydraulic system for a work machine having a linkage system is disclosed. The hydraulic system has a tank configured to hold a supply of fluid and at least one hydraulic actuator associated with the linkage system to affect movement of the linkage system. The at least one hydraulic actuator has a first pressure chamber and a second pressure chamber. The hydraulic system also has an independent metering valve associated with the first pressure chamber. The independent metering valve has a valve element movable between a first position at which fluid communication between the first pressure chamber and the tank is blocked, and a second position at which fluid is allowed to drain from the first pressure chamber to the tank. The hydraulic system further has at least one sensor configured to sense a parameter indicative of a pressure in the second pressure chamber, and a controller in communication with the independent metering valve and the sensor. The controller is configured to move the valve element of the independent metering valve in response to the pressure.
Public/Granted literature
- US20060218912A1 Hydraulic system having variable back pressure control Public/Granted day:2006-10-05
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