| 摘要 |
1. Device for regulating the supply of a hydraulic circuit (C) with fluid under pressure delivered by a source of pressure (3), incorporating : - a piston means (11) situated so as to slide and to be sealed in a bore (10) of a casing (1) and dividing the latter into a first chamber (12) joined to the source of pressure through a first conduit (5) and a second chamber (13) joined to the source of pressure through a second conduit (6) connected to the first conduit through a restriction (sigma) and to the operating hydraulic circuit through a supply line (8), - a spring (20), situated in the second chamber (13) and pushing the piston means (11) in the direction tending to reduce the volume of the first chamber (12) ; and - a discharge valve means (21) coupled to the piston means (11) and capable of being actuated, against the spring (20) so as to divert selectively a portion of the fluid under pressure coming from the source of pressure towards a reservoir (190), characterized in that the discharge valve means (21) is situated in a third chamber (14) of the casing (1) in permanent communication with the reservoir (190) and incorporating a valve seat (17) for the valve means (21) communicating with the supply line (8). |
