ROTARY VALVE FOR POWER STEERING

摘要

A hydraulic power steering rotary valve of generally conventional construction characterised in that the on-centre characteristics of the valve are governed by an arrangement of rolling elements (22) and pairs of notched elements (10, 20) arranged to produce a detent action between the input shaft (1) and the sleeve or driven member (2), one notched element (2) of each pair being fixed to a carrier (11) which is connected to the sleeve or driven member (2) by securing means (13) that, during assembly, is free to move under the influence of springs (23) acting on the notched elements (20) and thereby take up a position such that after completion of assembly the notched elements (10, 20) and rolling elements (22) are precisely in the correct position to provide the required detent action.