Invention Grant
- Patent Title: Methods of controlling hydraulic motors
- Patent Title (中): 控制液压马达的方法
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Application No.: US13295349Application Date: 2011-11-14
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Publication No.: US08172002B2Publication Date: 2012-05-08
- Inventor: Stefan Wrede , Christof Kruse
- Applicant: Stefan Wrede , Christof Kruse
- Applicant Address: US UT South Jordan
- Assignee: Longyear TM, Inc.
- Current Assignee: Longyear TM, Inc.
- Current Assignee Address: US UT South Jordan
- Agency: Ballard Spahr LLP
- Main IPC: E21B4/02
- IPC: E21B4/02

Abstract:
A hydraulic control system includes a first motor, a second motor, a pump operatively associated with the first motor, a first coupling valve operatively associated with the second motor, first parallel valves operatively associated with the second motor, and a first switching valve operatively associated with the first coupling valve and the first parallel valves. The first switching valve is configured to switch the first coupling valve between a first coupling state and a second coupling state opposite the first coupling state and to switch the first parallel valves between a first parallel state and a second parallel state opposite the first parallel state. While the first parallel valves are in the first parallel state a portion of the output of the first motor drives the second motor while the first parallel valves are in the second parallel state, the output of the pump drives the second motor.
Public/Granted literature
- US20120055715A1 METHODS OF CONTROLLING HYDRAULIC MOTORS Public/Granted day:2012-03-08
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