Hydraulic circuit having a multifunction selector
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United States of America Patent
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Dec 29, 2009
Grant Date -
Feb 28, 2008
app pub date -
Jul 8, 2005
filing date -
Jul 16, 2004
priority date (Note) -
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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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