| 摘要 |
This distributor comprises an outer element (3) mounted in rotation in a casing (1), and an inner element (10) mounted in rotation in the outer element, and capable of a limited rotation on either side of a neutral position. The outer element (3) comprises through inlet orifices (17a, 17b) communicating with a fluid pressure source (5), at least one pair of distribution orifices (19, 20) communicating selectively with one of the two opposite chambers of a drive member (B), and return recesses (18, 31) communicating permanently with the reservoir (15). The inner element (10) has longitudinal grooves (16) which, in a symmetrical neutral position, restrict in the same proportion the distribution orifices and, moreover, ensure a permanent communication between the inlet orifices and some of the return recesses. A movable restricting member (22, 23) is provided in controlled return recesses (18), which is capable of varying, under the effect of the control means, the passage cross-section of the return of the fluid between certain grooves (16) and the controlled recesses (18). Application to motor vehicle power-steering systems. <IMAGE>
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