| 摘要 |
<p>1,089,110. Fluid-pressure servomotor systems. SANDERS ASSOCIATES Inc. Aug. 17, 1964 [Sept. 5, 1963], No. 16133/67. Divided out of 1, 085, 921. Heading G3P. A hydraulic servosystem has a flapper 24 controlling the discharge from opposed nozzles 11, 12 to actuate a servo piston valve 31, controlling a motor 60. The return line 13a from the flapper housing leads to two branches 63, 64 so that one of the branches is connected to a return line 62 when the spool valve moves from its centre or null position. When the spool valve is in its null position, there is a restricted leakage to return 50 through restriction 65.</p> |
