Hydraulic circuit having a multifunction selector

Details Hydraulic circuit having a multifunction selector Hydraulic circuit having a multifunction selector

2005-07-08

2009-12-29

Leslie, Michael (Department: 3745)

Power plants

Pressure fluid source and motor

Condition responsive control of motive fluid flow

C060S394000, C060S493000

Reexamination Certificate

active

07637102

ABSTRACT:
An open hydraulic circuit comprising a main pump (P), a hydraulic motor (M), two main ducts (10, 12) constituting a feed main duct and a discharge main duct and connected to the pump or to a reservoir (R) via a feed selector (14). The circuit further comprises a multifunction valve device comprising a multifunction selector (20) for connecting the main duct that is at the higher pressure to a pressure limiter (24) and for connecting the main duct that is at the lower pressure to booster means (16), and for interconnecting the main ducts by connecting them to the pressure limiter when the pressures in the main ducts are substantially mutually equal.

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patent: 2 776 032 (1999-09-01), None
patent: 6-249204 (1994-09-01), None

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