Title:
CONSTRUCTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2023/190379
Kind Code:
A1
Abstract:
A closed-circuit pipe group (30) constituting a closed-circuit system (25-28) is distributed through upper positions of a closed-circuit hydraulic pump (29) and an open-circuit hydraulic pump (35) along an upper plate (22) of a building (20). Further, an open-circuit pipe group (36) constituting an open-circuit system (31-34) is distributed through lower positions of the closed-circuit hydraulic pump (29) and the open-circuit hydraulic pump (35) along a slewing frame (8). Accordingly, the present invention can form a work space between the closed-circuit pipe group (30) and the open-circuit pipe group (36).
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Inventors:
YANASE YOSHITAKA (JP)
OKANO HAJIME (JP)
MURAYAMA YUUJI (JP)
OKANO HAJIME (JP)
MURAYAMA YUUJI (JP)
Application Number:
PCT/JP2023/012281
Publication Date:
October 05, 2023
Filing Date:
March 27, 2023
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
E02F9/00; E02F9/08
Domestic Patent References:
| WO2021066892A1 | 2021-04-08 |
Foreign References:
| JP2015227544A | 2015-12-17 | |||
| JP2002121765A | 2002-04-26 | |||
| JPH11124879A | 1999-05-11 | |||
| JPH0211851U | 1990-01-25 | |||
| JP2015227544A | 2015-12-17 |
Attorney, Agent or Firm:
HIROWA PATENT FIRM (JP)
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