Title:
TANDEM PUMP UNIT AND WORK VEHICLE
Document Type and Number:
Japanese Patent JP2012144998
Kind Code:
A
Abstract:
To effectively prevent a temperature rise of stored oil in a first and second pump spaces storing a first and second hydraulic pumps, while reducing a cost through reduction of the number of parts.
A single relief valve setting hydraulic pressures of both of charge oil passages for the first and second hydraulic pumps, is provided in a port block positioned between the first and second hydraulic pumps in the axial direction. Relief oil from the relief valve is guided into both of the first and second pump spaces, and a first and second pump side drain ports for opening outside the first and second pump spaces, respectively, are provided.
Inventors:
TSUJI TOMOYUKI
KIYOOKA KOJI
KIYOOKA KOJI
Application Number:
JP2011002140A
Publication Date:
August 02, 2012
Filing Date:
January 07, 2011
Export Citation:
Assignee:
YANMAR CO LTD
International Classes:
F04B23/06; B60K17/10; F04B1/22; F04B53/08; F16H39/02
Domestic Patent References:
| JP2001116107A | 2001-04-27 | |||
| JP2005054964A | 2005-03-03 | |||
| JP2005008063A | 2005-01-13 |
Attorney, Agent or Firm:
Suzuki Katsuto
Minoru Ohnaka
Nobuo Ouchi
Minoru Ohnaka
Nobuo Ouchi
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