| 摘要 |
1,193,773. Valves. BORG-WARNER CORP. 18 Jan., 1968 [13 Feb. 1967], No. 2855/68. Heading F2V. Valve spool 24 is urged against the action of spring 36, to throttle outlet 20, by the pressure drop across orifice 30, and has a shoulder 27 which is subjected to the downstream pressure via bore 35 and chamber 22 to assist spring 36 so that the effective throttling action is a function of the difference between the upstream and downstream pressures. |
