Invention Grant
- Patent Title: Meterless hydraulic system having displacement control valve
- Patent Title (中): 具有排量控制阀的无液压液压系统
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Application No.: US13222895Application Date: 2011-08-31
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Publication No.: US08944103B2Publication Date: 2015-02-03
- Inventor: Patrick Opdenbosch , Michael L. Knussman , Joshua Dierking
- Applicant: Patrick Opdenbosch , Michael L. Knussman , Joshua Dierking
- Applicant Address: US IL Peoria
- Assignee: Caterpillar Inc.
- Current Assignee: Caterpillar Inc.
- Current Assignee Address: US IL Peoria
- Agency: Finnegan, Henderson, Farabow, Garrett & Dunner LLP
- Main IPC: F15B13/043
- IPC: F15B13/043 ; F15B7/00 ; E02F9/22

Abstract:
A hydraulic system is disclosed. The hydraulic system may have a pump, a tank, a displacement actuator having first and second chambers, a regeneration valve, and a load-holding valve. The hydraulic system may also have a displacement control valve including a valve element, and a stationary cage portion at least partially forming a high-pressure passage fluidly connecting the pump and valve element, a low-pressure passage fluidly connecting the valve element and tank, a first displacement actuator passage fluidly connecting the valve element and first chamber, a second displacement actuator passage fluidly connecting the valve element and second chamber, a load-holding control passage fluidly connecting the valve element and load-holding valve, and a regeneration control passage fluidly connecting the valve element and regeneration valve. The displacement control valve may also include a movable cage portion that is movable to selectively restrict fluid flow through only the first and second displacement actuator passages.
Public/Granted literature
- US20130048117A1 METERLESS HYDRAULIC SYSTEM HAVING DISPLACEMENT CONTROL VALVE Public/Granted day:2013-02-28
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