| 摘要 |
<p>1,220,726. Fluid-pressure servomotor systems. HELI-COIL CORP. CONTROLS DIVISION. Oct.4, 1968 [Oct.12, 1967 ], No. 47085/68. Heading G3P. A servo-valve comprises a spool 50 movable in a chamber 24, a pilot valve 68 for controlling the spool, a force motor having a movable coil 70 carrying the pilot valve, and a spring 72 having a constant spring rate supporting the coil in a neutral position. The spring is of barryllium copper, has a number of arms 78 to provide the required stiffness and support rings spun over its outer and inner edges. Fluid is supplied to the pilot valve through a passage 40 and a radial passage 38 through the spool 50 which connects an inlet passage 28 to either of two control passages 26, 30. Pole pieces 60, 62 surround the coil 70.</p> |
