| 摘要 |
<p>PCT No. PCT/EP84/00132 Sec. 371 Date Mar. 15, 1985 Sec. 102(e) Date Mar. 15, 1985 PCT Filed May 4, 1984 PCT Pub. No. WO85/00564 PCT Pub. Date Feb. 14, 1985.A booster steering valve control of the kind that comprises a pair of valve pistons reciprocal in a rotative valve body are driven by a fork shaped member at the end of a steering spindle. The fork shaped member comprises a pair of spaced actuator pins which engage in openings of the respective valve pistons. Thus, the valve body and the fork shaped member have a common axis about which the actuator pins rotate. A particular construction of the invention resides in the displacement of the actuator pins such that their axes are not in a common plane with the steering spindle axis but offset so that the surfaces of engagement between the actuator pins with the respective valve pistons and the spindle axis are coplanar. Engagement is maintained by spring bias acting on the valve pistons. Other construction provides widening the distance between the actuator pins by engaging side grooves of respective valve pistons and providing resilient clamps having a force direction acting on the valve pistons to effect surface engagement between the grooves and respective actuator pins parallel to the reciprocal axes of the valve pistons directly in line with the engaged surfaces.</p> |
