Hydraulic Circuit Comprising a Multipurpose Selector

摘要

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.