Title:
HYDRAULIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/065161
Kind Code:
A1
Abstract:
A first check valve (15) is provided in a first line (10) connected to a first pump (11) to ensure forward flow from the first pump (11) to the main engine hydraulic circuit (5). A differential pressure regulating valve (6) is provided connected to an upstream portion (10a) upstream from the first check valve (15) of the first line (10) and to a downstream portion (10b) downstream from the first check valve (15) of the first line (10). The differential pressure regulating valve (6) discharges hydraulic oil of the downstream portion (10b) when the value obtained by subtracting the upstream pressure (Pa) of the upstream portion (10a) from the downstream pressure (Pb) of the downstream portion (10b) is greater than a constant (Ps).
Inventors:
MIYAGI JUNICHI (JP)
Application Number:
PCT/JP2010/068713
Publication Date:
June 03, 2011
Filing Date:
October 22, 2010
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
MIYAGI JUNICHI (JP)
MIYAGI JUNICHI (JP)
International Classes:
F15B11/00; B30B1/32; F15B11/02; F15B11/028
Foreign References:
| JPH04103890A | 1992-04-06 | |||
| JP4341719B1 | 2009-10-07 | |||
| JPH09323523A | 1997-12-16 | |||
| JP2009174572A | 2009-08-06 |
Attorney, Agent or Firm:
TANAKA, Mitsuo et al. (JP)
Mitsuo Tanaka (JP)
Mitsuo Tanaka (JP)
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