| 摘要 |
<p>1,056,533. Valves. SHORT BROS. & HARLAND Ltd. May 11, 1964 [May 16, 1963], No. 19550/63. Heading F2V. In a three-way valve suitable for use as a pilot valve for controlling the main unloading valve of a forging press, pressure fluid enters at 21 and is directed via bores 15, 18 at an angle to the spool axis to thereby apply an axial force which assists that movement of the spool. allowing flow between the inlet port and an actuator port 21, and which partially, fully or over-compensates for the reaction force developed on the spool as the result of such flow. The reaction force produced on the spool as the result of fluid flow between the actuator port and an outlet port 21 is also partially, fully or over-compensated by means of a Venturishaped waist 16 provided on the spool, and by means of a similar shaped adjacent recess in the sleeve 11. The spool may be actuated by a moving coil transducer.</p> |
