Abstract: The end zones (11) of the C-springs (9) of the resilient device for the centering and coupling with backlash of first (1) and second (7) coaxial rotary components form lugs (12) extending radially inward in order to cooperate with stop surfaces (15) in the first rotary component (1), and external shoulders (19) in order to cooperate with facing shoulders (18) formed in the inside wall (16) of the second rotary component (7), the shoulders (18) being angularly offset from the stop surfaces (15) and substantially contiguous with the latter in projection onto the median plane (M) of the device in the centered position of the rotary components (1, 7).

Abstract: The assembly for supporting in terms of rotation and for sealing a first element (2; 5) rotating in a second element (7) comprises an outer raceway structure consisting of two sheet-metal half-raceways (11; 12) having two coupled outer collar portions (13; 14) serving for mounting the outer raceway structure in an orifice in the second element, and a first (13) of the outer half-raceways carrying the lip seal (22) interacting with the first element (2; 5) forming the inner raceway (10) typically has an extension part (21) opposite the collar portion (13), the lip seal (22) advantageously having a peripheral part (23; 23') forming a static seal and interacting in engagement contact with a wall of the orifice in the second element.

Abstract: The two stator members of the distributor (5, 6), between which the rotor of the distributor (10) is placed, are assembled under an axial prestress by an assembly tie rod (12) comprising, at one end, an annular shoulder (17) cooperating in bearing against a bearing surface of the adjacent stator member (5) and, at its other end a profiled annular groove (18) in which a metal ring (23) is fitted by force, under axial stress with radial deformation, so as to exert an axial stress on a radial bearing surface of the adjacent stator member (6). Application to the construction of rotary hydraulic distributors, especially for power-assisted vehicle steering systems.

Abstract: The hydraulic distributor, of the type comprising, in each of two parallel circuits (.alpha., .alpha.'), between a pressure source (S) and a tank (R), two modulable restrictions in series (A, B; A', B'), comprises in addition, in each circuit (.alpha., .alpha.'), a first (C; C') and a second (D; D') fixed restriction adapted to be put into operation alternately in synchronism with the modulable restrictions downstream of each of the latter, the fixed restriction put into operation being the one directly downstream of the modulable restriction operated in its closing direction.

Abstract: A modulator assembly is interposed in a fluid circuit between a source (S) and a user device (U), said assembly being composed of a metering electrovalve (E) forming a first restriction (.sigma.1) in the fluid circuit, a pressure regulation valve (R), loaded by a spring (22), being subjected to the pressure of fluid delivered by the metering electrovalve to the user device and forming a second variable restriction (.sigma.2) between the outlet of the electrovalve (E) and a tank (33). The pressure regulation valve (R) is integrated into the metering slide (14) of the electrovalve.

Abstract: The rotating and sealed bearing assembly (14) of a first member (2) rotating in a second member (10) comprises a structure of a bearing outer track constituted by a backing plate in sheet steel (18) shaped in order to present an intermediate zone of rounded profile (17) forming the bearing outer track extending, on one side, folded back (19), by a first zone with radial end (20) and, on the other side, by a second zone with axial end (21) with the lip seal (23) interacting with the first member (2) and, to advantage, a static seal (25) interacting in engagement contact with the housing (10).