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Title:
HYDRAULIC CONTROLLER, CONSTRUCTION MACHINE, AND HYDRAULIC SHOVEL
Document Type and Number:
Japanese Patent JP2002295405
Kind Code:
A
Abstract:

To provide a hydraulic controller, for such as construction machines, excellent in operability and coinciding with the feeling of an operator.

The hydraulic control comprises a variable displacement pump 1; a switch valve group A of a switch valve A-1 and a switch valve A-2 having a load sensing function; a switch valve group B containing a switch valve B-1 and other having no load sensing function.; and a pressure compensation flow rate means C (block C). The switch valve group A is connected to a first discharge line 18 from which a discharge line 17 of a variable displacement pump 1 is branched, the switch valve group B is connected to a second discharge line 19, from which the discharge line of the variable displacement pump 1 is branched, through a pressure compensation flow regulating means C (the block C), and a pass flow rate of the pressure compensation flow regulating means C (the block C)is regulated according to operation of a switch valve contained in the switch valve group B.


Inventors:
MATSUMOTO SATORU
ARAYA TAKASHI
Application Number:
JP2001094572A
Publication Date:
October 09, 2002
Filing Date:
March 29, 2001
Export Citation:
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Assignee:
TOSHIBA MACHINE CO LTD
International Classes:
E02F9/22; F15B11/00; F15B11/05; F15B11/16; (IPC1-7): F15B11/00; E02F9/22; F15B11/05
Domestic Patent References:
JP2000035006A2000-02-02
JPH0552204A1993-03-02
JPH0526204A1993-02-02
Foreign References:
WO1993005301A11993-03-18