Title:
CONSTRUCTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2011/132673
Kind Code:
A1
Abstract:
Disclosed is a construction machine, wherein a boom assist cylinder (7A) hydraulically assists movement of a boom (4), and an arm assist cylinder (8A) hydraulically assists movement of an arm (5). An accumulator (16) stores in a compressed state a hydraulic fluid which is supplied to the boom assist cylinder and the arm assist cylinder. A first hydraulic pipe (14) connects the boom assist cylinder and the accumulator. A second hydraulic pipe (12) connects the arm assist cylinder and the accumulator. The second hydraulic pipe is connected to a hydraulic connection port of the arm assist cylinder in a manner such that the hydraulic fluid is supplied from the accumulator to the arm assist cylinder in the direction in which the arm is closed.
Inventors:
TSUKANE KOICHIRO (JP)
Application Number:
PCT/JP2011/059623
Publication Date:
October 27, 2011
Filing Date:
April 19, 2011
Export Citation:
Assignee:
SUMITOMO HEAVY INDUSTRIES (JP)
TSUKANE KOICHIRO (JP)
TSUKANE KOICHIRO (JP)
International Classes:
E02F9/22; F15B21/14
Foreign References:
| JPH09242127A | 1997-09-16 | |||
| JP2582310B2 | 1997-02-19 | |||
| JPH01199002A | 1989-08-10 |
Attorney, Agent or Firm:
ITOH, TADAHIKO (JP)
Tadahiko Ito (JP)
Tadahiko Ito (JP)
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Claims:
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