Title:
FLUID PRESSURE CONTROL DEVICE FOR POWER SHOVEL
Document Type and Number:
WIPO Patent Application WO/2014/073515
Kind Code:
A1
Abstract:
A fluid pressure control device for a power shovel, comprising: a first switching valve that connects or disconnects a first pump and a first cylinder; a second switching valve that connects or disconnects a second pump and a second cylinder; a third pump capable of supplying hydraulic fluid to the first cylinder and the second cylinder; a first confluence control valve that connects or disconnects the third pump and the first cylinder or second cylinder; and a connection control valve that, when the second pump and the second cylinder are connected by the second switching valve regardless of whether or not the first pump and the first cylinder are connected by the first switching valve, disconnects the third pump and the first cylinder and guides hydraulic fluid discharged by the third pump to the second cylinder, by controlling the first confluence control valve.
Inventors:
KOJIMA MASANARI (JP)
NAKAMURA MASAYUKI (JP)
TERAO TAKESHI (JP)
NAKAMURA MASAYUKI (JP)
TERAO TAKESHI (JP)
Application Number:
PCT/JP2013/079852
Publication Date:
May 15, 2014
Filing Date:
November 05, 2013
Export Citation:
Assignee:
KAYABA INDUSTRY CO LTD (JP)
International Classes:
F15B11/02; E02F9/22; F15B11/08
Foreign References:
| JP2012036909A | 2012-02-23 | |||
| JP2006328765A | 2006-12-07 | |||
| JPS54164391U | 1979-11-17 | |||
| JP2005121043A | 2005-05-12 |
Attorney, Agent or Firm:
GOTO, Masaki et al. (JP)
Masaki Goto (JP)
Masaki Goto (JP)
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