EP 0446757 B1 19940824 - Hydraulic system to supply a variable displacement pump.
Title (en)
Hydraulic system to supply a variable displacement pump.
Title (de)
Hydrauliksystem zur Versorgung einer Verstellpumpe.
Title (fr)
Système hydraulique pour fournir une pompe à débit variable.
Publication
Application
Priority
US 49219890 A 19900313
Abstract (en)
[origin: US5020324A] A charge flow distribution valve routes all charge pump flow into a main pump until the main pump has sufficient inlet pressure. The valve opens to a first stage which routes excess charge flow to lubrication circuits. At a slightly higher main pump inlet pressure, it also routes oil to an inlet of the charge pump.
IPC 1-7
IPC 8 full level
F04B 49/00 (2006.01); F15B 11/02 (2006.01); F15B 21/04 (2006.01)
CPC (source: EP US)
F04B 49/007 (2013.01 - EP US); F15B 11/162 (2013.01 - EP US); F15B 2211/20546 (2013.01 - EP US); F15B 2211/20576 (2013.01 - EP US); F15B 2211/40515 (2013.01 - EP US); F15B 2211/45 (2013.01 - EP US); F15B 2211/611 (2013.01 - EP US); F15B 2211/613 (2013.01 - EP US); F15B 2211/615 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE DE ES FR GB IT NL SE
DOCDB simple family (publication)
US 5020324 A 19910604; AT E110444 T1 19940915; CA 2038112 A1 19910914; CA 2038112 C 19940816; DE 59102593 D1 19940929; EP 0446757 A1 19910918; EP 0446757 B1 19940824; ES 2057630 T3 19941016; JP 3070962 B2 20000731; JP H04211704 A 19920803; MX 172032 B 19931129
DOCDB simple family (application)
US 49219890 A 19900313; AT 91103253 T 19910305; CA 2038112 A 19910312; DE 59102593 T 19910305; EP 91103253 A 19910305; ES 91103253 T 19910305; JP 4820391 A 19910313; MX 2472991 A 19910227