Title:
EXCAVATOR
Document Type and Number:
WIPO Patent Application WO/2019/022029
Kind Code:
A1
Abstract:
An excavator according to an embodiment of the present invention is provided with: a hydraulic motor for rotation; a hydraulic pump for supplying hydraulic oil to the hydraulic motor for rotation; a rotation control valve provided in a pipe passage connecting the hydraulic motor for rotation and the hydraulic pump; and a bypass circuit capable of providing communication between a first pipe passage which connects the hydraulic motor for rotation and the rotation control valve, and a second pipe passage which is located upstream of a control valve for another hydraulic actuator disposed downstream of the rotation control valve.
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Inventors:
MATSUZAKI EISUKE (JP)
Application Number:
PCT/JP2018/027564
Publication Date:
January 31, 2019
Filing Date:
July 23, 2018
Export Citation:
Assignee:
SUMITOMO HEAVY INDUSTRIES (JP)
International Classes:
E02F9/20; F15B11/02
Foreign References:
| JPH09177139A | 1997-07-08 | |||
| JP2016038074A | 2016-03-22 | |||
| JP2010112493A | 2010-05-20 | |||
| US20110262287A1 | 2011-10-27 |
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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