Title:
作業機械の油圧回路
Document Type and Number:
Japanese Patent JP4281714
Kind Code:
B2
Abstract:
A hydraulic circuit for a working machine includes hydraulic actuators (9,10) which respectively drive a plurality of kinds of working devices and which are driven by a drive circuit having circuit states that correspond to the working devices, a directional control valve unit (19) which, when one of the working devices is attached to the attachment, switches in response to a signal from a controller (21) to select one of the circuit states, a detection sensor (23) that detects the actual circuit state, and a display (24) operated by the controller. The controller activates the display when the detected actual circuit state and the selected circuit state do not match.
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Inventors:
Koji Ueda
Application Number:
JP2005181926A
Publication Date:
June 17, 2009
Filing Date:
June 22, 2005
Export Citation:
Assignee:
Kobelco Construction Machinery Co., Ltd.
International Classes:
E02F9/22; E02F9/26; F15B11/08; F15B20/00
Domestic Patent References:
| JP2002294758A | ||||
| JP2000143171A | ||||
| JP2004027835A | ||||
| JP11255015A |
Attorney, Agent or Firm:
Etsushi Kotani
Takao Ito
Jiro Higuchi
Muramatsu Toshiro
Takao Ito
Jiro Higuchi
Muramatsu Toshiro