| 摘要 |
<p>1. A pressure relief and flow control valve (14) for a hydrostatic gear having a sliding piston (19) which is displaceable in sealing manner in a bore (18) against the force of a spring (26), and which has a longitudinal bore (22) which opens at the inlet side and is provided with a throttle constriction (23), and which opens into a cross bore (24), where in said bore (18) there are arranged an annular groove (30), which is connected to a discharge cross bore (31), and at least one stop (29) for an end position of the sliding piston (19), characterised in that the cross bore (24) in the sliding piston (19) is completely closed off by the wall of the bore (18) in the end position of said sliding piston (19) and the sliding piston (19) is displaceable against the force of the spring (26) to such an extent that, also in the position of furthest displacement against the force of the spring (26), the cross bore (24) in the sliding piston (19) is covered by the wall of the bore (18) on the other side of the annular slot (30) ; and that in this position of the sliding piston (19), a connection (33, 34, 35 and 43, 34, 35) is present between the longitudinal bore (22) and the closed space (36) which contains the spring (26).</p> |
