Title:
HYDRAULIC DEVICE FOR HYDRAULIC TRAVEL MACHINE
Document Type and Number:
Japanese Patent JP2005344879
Kind Code:
A
Abstract:
To achieve a reduction in the diameter of a hose without impairing the performance during travel when the maximum flow amount is required, while reducing pulsation during non-travel.
This hydraulic device for a hydraulic travel machine comprises a hydraulic pump and a direction changing valve group connected to the discharge side of the hydraulic pump. It has a first hydraulic pressure pipe for connecting the hydraulic pump to the direction changing valve group, a second hydraulic pressure pipe connected in parallel to the first hydraulic pressure pipe, and an on-off valve provided on one of the first hydraulic pressure pipe and the second hydraulic pressure pipe for changing over a flow path to be closed/opened.
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Inventors:
EGASHIRA MASAKI
Application Number:
JP2004167233A
Publication Date:
December 15, 2005
Filing Date:
June 04, 2004
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY
International Classes:
E02F9/00; F15B11/00; (IPC1-7): F15B11/00; E02F9/00
Attorney, Agent or Firm:
Kenjiro Take
Ichiro Suzuki
Hirohiro Ichimura
Kazunori Satake
Ichiro Suzuki
Hirohiro Ichimura
Kazunori Satake