| 摘要 |
<p>A control valve (31) for a power steering system or the like has a sleeve (37) with a conical bore (52) and a rotor (47) with a conical outer surface (53) conjugate to the bore (52) for relative rotation therein. The conjugate surfaces of the sleeve (37) and rotor (47) are formed with longitudinal control grooves (54), (56), (57), (58) having bottom surfaces which are parallel to the axis of the valve (31), thereby allowing the sleeve (37) and rotor (47) to be formed in one piece molds and pulled straight out of the molds.</p> |
