| 摘要 |
<p>1. Distributor unit (10) comprising a housing (12) in which are defined a first and a second inlet chambers (22, 34) provided for connection respectively to two independent sources of fluid under pressure (38, 40), and an outlet chamber (30) provided for connection to a work circuit (40), and means for allowing pressurization of said outlet chamber (30) by connection with one of said inlet chambers (22) when the inlet chambers (22, 34) are simultaneously supplied with fluid under pressure, said means comprising a passage (20), connecting the outlet chamber (30) to the considered inlet chamber (22), a valve (24) provided in said passage (20) and a control member (16) cooperating with said valve (24), characterized in that said valve (24) consists of a non-return valve preventing, at rest, flow of fluid from said inlet chamber (22) towards the outlet chamber (30) and that said control member (16) consists of a piston slidably mounted in said housing (12) and subjected on its two faces to the pressures prevailing respectively in said outlet chamber (30) and in the other inlet chamber (34).</p> |
