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Patent Searching and Data


Title:
OPEN CENTER HYDRAULIC SYSTEM AND VALVE
Document Type and Number:
WIPO Patent Application WO/2019/011859
Kind Code:
A3
Abstract:
The present invention relates to An open center hydraulic system (100), the open center hydraulic system (100) comprising a tank configured to hold hydraulic fluid, a pump configured to provide pressurized hydraulic fluid from the tank, a shunt valve configured to adapt an first opening area between a first input port and a first output port of the shunt valve dependent on a first control signal, wherein the first input port is coupled to the pump and the first output port is coupled to the tank, a first actuator valve coupled to the first input port and configured to adapt a second opening area of the first actuator valve dependent on a second control signal, a hydraulic valve control unit configured to determine a first opening area value and a second opening area value based on user input data and a predetermined relation dependent on the user input data,sending the first control signal, indicative of the first opening area value and sending the second control signal indicative of the second opening area value.

Inventors:
LUNDGREN, Bertil (Nässom 559, Bjärtra, 872 96, SE)
Application Number:
EP2018/068544
Publication Date:
February 28, 2019
Filing Date:
July 09, 2018
Export Citation:
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Assignee:
NORDHYDRAULIC AB (Industrievägen 15, Kramfors, 872 24, SE)
International Classes:
F15B1/02; F15B11/042; F15B13/08; F15B15/20; F15B19/00; F15B21/08; F16K11/00
Domestic Patent References:
WO2002046021A22002-06-13
Foreign References:
EP1403527A12004-03-31
US7036421B22006-05-02
EP1209365A22002-05-29
Attorney, Agent or Firm:
BARTELS UND PARTNER, PATENTANWÄLTE (Lange Str. 51, Stuttgart, 70174, DE)
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