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Patent Searching and Data


Title:
FLUID PRESSURE CONTROL DEVICE FOR POWER SHOVEL
Document Type and Number:
WIPO Patent Application WO/2014/073551
Kind Code:
A9
Abstract:
A fluid pressure control device for a power shovel, comprising: first, second, and third pumps; a first switching valve connected to the first pump; a second switching valve connected to the second pump; a first confluence control valve connected to the third pump; and a second confluence control valve provided downstream from the first confluence control valve. The first confluence control valve is switched by the pilot pressure of the first switching valve or the second switching valve, and connects to the downstream side of the third pump. The second confluence control valve is switched by the pilot pressure of the second switching valve, and disconnects the connection between the third pump and the first switching valve.

Inventors:
KOJIMA MASANARI (JP)
NAKAMURA MASAYUKI (JP)
TERAO TAKESHI (JP)
Application Number:
PCT/JP2013/079972
Publication Date:
January 08, 2015
Filing Date:
November 06, 2013
Export Citation:
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Assignee:
KAYABA INDUSTRY CO LTD (JP)
International Classes:
F15B11/02; E02F9/22; F15B11/08
Attorney, Agent or Firm:
GOTO, Masaki et al. (JP)
Masaki Goto (JP)
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