| 摘要 |
<p>1309162 Valves ROBERT BOSCH GmbH 25 June 1970 [28 June 1969] 30810/70 Heading F2V [Also in Division G3] A valve has a spool 13 biased to the right by a spring 34 and supplying from an inlet 25 a constant flow to an outlet 31 while conducting the excess to an outlet 33. Interruption of the flow from the outlet 31 causes pressure in chamber 39 to rise and move the spool to the left so that the flow is switched from the outlet 31 to outlet 33. The outlet 31 communicates with a chamber 35 via a restriction 37 and the outlet pressure is releaved by spring-loaded valve 41. The pressure at the outlet 33 is determined by the spring-loaded valve 43 which can be set at a pressure equal to or greater than that of valve 41. Restriction 37 and valve 41 may be combined in a spool valve, one land of which acts as a relief valve and another of which acts as a variable throttle.</p> |
