Title:
HYDRAULIC CIRCUIT FOR CONSTRUCTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2014/091685
Kind Code:
A1
Abstract:
Provided is a hydraulic circuit that makes it possible to switch the circuit state between a state in which a regenerative action operates and a state in which the regenerative action stops. The hydraulic circuit comprises: hydraulic pumps (10, 11); a plurality of hydraulic actuators (7, 8); a plurality of control valves (12-14) that are provided for each of the hydraulic actuators; a regeneration line (26) for sending returning oil to a regeneration destination, said returning oil being returned to a tank from a hydraulic actuator (7) that is specified from among the actuators; a regeneration valve (30); a meter-out valve (32); and flow path switching devices (28, 29, 33) that switch the flow path of the returning oil between a first flow path that sends the returning oil to the regeneration line and causes the regenerative action and a second flow path that sends the returning oil to a control valve for the specified hydraulic actuator in order to stop the regenerative action.
Inventors:
UEDA KOJI
Application Number:
PCT/JP2013/006799
Publication Date:
June 19, 2014
Filing Date:
November 19, 2013
Export Citation:
Assignee:
KOBELCO CONSTR MACH CO LTD (JP)
International Classes:
F15B20/00; E02F9/22; F15B11/024; F15B21/14
Foreign References:
| JP2010190261A | 2010-09-02 | |||
| JP2012013160A | 2012-01-19 | |||
| JP2004138187A | 2004-05-13 | |||
| JP2003120604A | 2003-04-23 | |||
| JP2007107616A | 2007-04-26 | |||
| JP2010190261A | 2010-09-02 |
Other References:
See also references of EP 2933505A4
Attorney, Agent or Firm:
KOTANI, Etsuji et al. (JP)
Etsuji Kotani (JP)
Etsuji Kotani (JP)
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