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Patent Searching and Data


Title:
MULTI-PUMP UNIT, TANDEM PUMP UNIT, AND WORK VEHICLE
Document Type and Number:
WIPO Patent Application WO/2012/093705
Kind Code:
A1
Abstract:
First and second port blocks have commonalities in that each includes: an axial hole through which a pump shaft is inserted; a pair of working oil passages; a charge oil passage that has one end opening up in the outer surface and forming a pressurized-oil receiving port; and a branched oil passage that has one end in fluid connection with the charge oil passage and the other end opening up in the end surface and forming a connection port. The connection port is located on a virtual plane that lies along the first plate-surface direction and the thickness direction while passing through the axis of said axial hole. A pressurized oil is supplied to one of the pressurized-oil receiving ports and the other pressurized-oil supply port is closed with a plug. A relief valve for setting the oil pressure of the charge oil passage is attached to only one of the first and second port blocks.

Inventors:
TSUJI TOMOYUKI (JP)
KIYOOKA KOJI (JP)
Application Number:
PCT/JP2012/050131
Publication Date:
July 12, 2012
Filing Date:
January 06, 2012
Export Citation:
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Assignee:
YANMAR CO LTD (JP)
TSUJI TOMOYUKI (JP)
KIYOOKA KOJI (JP)
International Classes:
F04B23/06; B60K17/10; F04B1/22; F04B53/08; F16H39/02
Foreign References:
JP2001116107A2001-04-27
JP2005054964A2005-03-03
JP2005008063A2005-01-13
JPS5569773A1980-05-26
Attorney, Agent or Firm:
SUZUKI Katsuhito et al. (JP)
Suzuki 活 people (JP)
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Claims: