Abstract: Disc brake with automatic adjustment incorporating a calliper (10) mounted so as to slide on a fixed support by way of at least one axial pillar, a brake actuator (34) acting directly upon a first friction component, and by reaction through the calliper, upon a second friction component, the brake actuator (34) incorporating a mechanical control (48-50-60) acting upon a hydraulic control piston (36) through an automatic adjustment device (66), the adjustment device (66) being formed by a screw and nut system (68-70), which has a pitch which allows reverse action, and is capable of being actuated by the hydraulic piston (36) beyond a predetermined travel of the latter, the adjustment device (66) incorporating a sleeve (104) firmly fixed in rotation to the nut (70) and cooperating with annular control piston (80) which is capable of moving so as to be sealed relative to the screw (68) and relative to the brake actuator (34), the control piston (80) immobilizing the sleeve (104) in rotation and in translation wh

Abstract: The invention concerns a braking corrector (10) of the type incorporating at least one piston (16, 16') provided with a passage joining the inlet chamber (18, 18') and the outlet chamber (22, 22') to one another, a valve (26, 26') controlling the communication through the passage, a control device (34) generating a pilot force which is capable of being applied to the piston (16, 16'), pushing the latter in the direction of opening of the valve (26, 26'); the invention provides the corrector (10) with a device (52) for monitoring the pilot force which is capable of limiting the latter when the reaction force generated by the pressure on the piston (16, 16') exceeds the pilot force by a predetermined amount.

Abstract: The spring (14), consisting of a metal sheet folded in the general shape of a V, incorporates a pair of main wings (15) bearing against an inside surface of the arch (7) of the sliding caliper (4) of the brake, joined by a central axial portion (16) bearing against the pads (2a, 2b), and at least one mounting wing (21), close to an axial end (18) of the spring, separated from the adjacent main wing (15) by a notch (20) and extended into an end portion forming a hook (22) engaged in an opening (25) in the arch (7) which is provided with a recessed shoulder (27) for retaining the hook (22), the axial end (18) of the spring (14), consisting advantageously of a finger folded back (24), bearing against an inside surface (11) of the inner portion (5) of the caliper which encloses a brake actuator (10).

Abstract: Hydraulic assistance device of the mixed hydrodynamic/hydrostatic type incorporating a body (10) in which a first piston (18) is slideably mounted and moveable between a first position allowing the communication of a first chamber (53), joined to a braking circuit, to a reservoir (12), and isolating this chamber (53) from a source of high pressure fluid (86), and a second position isolating the chamber (53) from the reservoir (12) and connecting it with the source (86); a second chamber (30) in the body (10) connected by a passage (90) to the brakes (66), and valve mechanism (92) normally closing the passage (90) and sensitive to the pressure in the chamber (30) so that, when the latter pressure reaches a value which is greater than that existing in the first chamber (53), the valve mechanism (92) opens allowing fluid to flow between the second chamber (30) and the brakes (66).

Abstract: The invention concerns a mechanism for actuating a disc brake, incorporating a piston (5) coupled to a brake pad (1), a wedge (12) which is moveable longitudinally, under the action of a control rod (10), between surfaces (5a, 17a) forming part of the piston (5) and of a reaction component (17), respectively, and a pair of rollers (13) situated on each side of the wedge (12) and able to roll between the surfaces (12a, 12b) of the latter and the surfaces of the piston (5) and of the reaction component (17). The space in which the wedge (12) and the rollers (13) move is confined in a closed hydraulic chamber (17). The control rod (10) actuating the wedge forms a penetrating piston which determines variations of volume in this chamber (7) producing a hydraulic thrust upon the piston (5). The corresponding displacement of the latter is slightly greater than that which the wedge (12) would communicate to it mechanically through the intermediary of the roller (13), for the same displacement of the control rod (10).

Abstract: Process for forming an hydraulic connection on a hollow body 10, for example a master cylinder, by fitting an interconnecting piece 24 onto a tubular protuberance 16 projecting outwards from the wall of the body 10. The protuberance has at least one thin-walled part which, when the interconnecting piece 24 has been fitted over the protuberance 16, is flanged outwards against an internal bearing surface 38 of the interconnecting piece 24.

Abstract: Braking corrector of the type incorporating a simple or differential piston provided with a passage joining together the inlet and outlet chambers, a valve controlling communication through the passage, a return spring joined to a component, which is movable as a function of the vehicle load, to return the piston to a rest position, and an abutment holding the valve open in this same position. The invention provides for the corrector (10) to be provided with an elastic device (40) for limiting the travel of the piston (16) towards its rest position, this device only coming into action after the valve (24) has lifted from its seat (26) and subsequently modulating the retraction of the piston as a function of the thrust which is transmitted to it by the return spring (36). Applicable to the braking systems of motor vehicles.

Abstract: The braking system incorporates at least one brake disc disc (26 36) mounted so as to slide axially on a hub (22) along key mechanisms (30, 32). According to the invention the braking system incorporates an integral device for forced greasing (60) of the key mechanisms (30, 32) formed by two sealed chambers with variable volumes joined to one another by way of the key mechanisms (30, 32).

Abstract: The inertial brake corrector comprises a body (1) closed by a cover (7), with a stepped piston (10) incorporating a tubular extension part (13) extending in a direction opposite the outlet chamber (20) and interacting on the inside by sliding in a leak-proof manner with a central projection of reduced diameter (14) of the cover (7), which extends in the body and which delimits, together with the tubular extension part of the piston, an inlet chamber (21) in which is located an inertial shut-off member (24), of which the retention and guide structure forming a slope (27") is advantageously fixed to the stepped piston (10).

Abstract: Disc brake having a caliper (18) mounted for sliding on a fixed support (10) by way of two axial pins (14, 16) passing through openings (20, 22) formed respectively in a rear arms (24) and in a front arm (26) of the fixed support (10). According to the invention, the caliper (18) has two openings (54, 56), the first opening (54) receiving the rear arm and the corresponding pins (14) and permitting the radial extraction of the friction elements (36, 38), and the second opening (56) receiving the front arm (26) and the corresponding pins (16).

Abstract: The disc brake incorporates a sliding caliper (18) straddling a rotating disc, the caliper incorporating a first portion (24) sliding on a fixed support (10) by way of at least one axial pillar (20) and incorporating a second portion (28) of the caliper astride the disc. The second portion (28) is hinged to the first portion (24) along an axis of articulation (D) parallel to the plane of the disc and situated radially nearer to the axis of rotation (B) of the disc than the line of action (C--C) of the brake actuator, an abutment (56-58) is positioned between the first (24) and the second (28) portions and lies in a plane perpendicular to the plane of the disc and parallel to the axis of articulation (D).

Abstract: The invention relates to a multi-disc brake comprising a stationary rotary disc (1) and a movable rotary disc (2) which is mounted on a splined sleeve (5) sliding on a splined part (3a) of a hub (3) which has an axis (4) and with which the disc (1) is solid. An assembly of friction blocks (6 to 9) can interact with the discs (1, 2) under the action of a hydraulic jack (13). These blocks occupy a limited angular sector over the periphery of the discs. The splines (23, 25) of the hub and of the sleeve have shaped flanks. A ring (30) for guiding the sleeve (5) radially relative to the hub (3) is provided at each of its ends, so as to prevent any jamming of the sleeve (5) because of the tendency of the disc (2) to rock under the action of the jack (13).

Abstract: Multi-disc brake, of the type incorporating at least one first rotary disc firmly fixed to the wheel of the vehicle and a second rotary disc mounted so as to slide on a support component itself firmly fixed to the wheel, the driving in rotation of the second disc by the said support component being effected by the intermediary of complementary splines having a gear tooth profile. To overcome the undersirable effects of the tilting moment exerted on the sliding disc (2) by the thrust of the actuating cylinder (12), the invention is arranged to provide this disc with axial guiding projections (14) engaging in openings of corresponding shape (15) arranged in the other disc (1).

Abstract: The device incorporates a tubular bearing component (20) having an end portion inserted into the bottom (11) of the piston (1) and a portion projecting into the cavity (9) of the piston, the uni-directional clutch-spring (14) for the tapped sleeve (12) engaged on the threaded rod (8) for the handbrake being mounted on this projecting portion of the bearing component and incorporating an end arm (15) joined to the sleeve (12).

Abstract: The invention relates to a drum brake for an automotive vehicle, comprising two brake shoes (18, 20) adapted to be moved apart by a wheel cylinder (14), one (18) of said shoes carrying an adjuster including a lever (40) having a free end (48) defining a toothed sector (52) cooperating with a pawl (44) also carried by said one shoe (18), a strut (50) being provided between the other shoe (20) and the lever (40) to automatically control pivoting of the latter.A link (74) disposed between the pawl (44) and the lever (40) to prevent pivoting of the latter through more than a predetermined angle relative to the position occupied by the lever (40) when the lining carried by the shoes (18, 20) are new.

Abstract: The invention concerns the construction of a blank with a view to manufacturing a handbrake control lever (34) for a drum brake. The blank defines two fingers situated essentially at the extension of the body of the blank, one of the fingers is to be folded back to form a trough (62) to accept a cable, the other finger is to be positioned relative to the trough (62) so as to prevent the cable from escaping from the latter.

Abstract: The servomotor incorporates a component (30) for retaining and for positioning the plunger (12) forming the moveable seat (11) for the valve means (9), the component (30) consisting of a plate incorporating a U-shaped central portion lying in a radial cavity (18) of the valve body (8) and cooperating with a shoulder (47) of the plunger (12), and a portion outside the valve body (8) pivoting about an axis Z carried by the valve body and having an end (42) coming into abutment, in the rest position, against a ring (43) mounted in the neck (21) of the casing (1).

Abstract: The subject of the invention is a disc brake of the type with a caliper (1) mounted to slide on a fixed support (4) by a column (3). The caliper (1) incorporates a brake motor (9) acting directly on an inner pad and via the caliper (1) on an outer pad. The two pads are received so as to slide in an orifice (5) formed in the caliper (1). The pads are locked in the orifice by a key (20). According to the invention, the inner pad incorporates a semi-circular lug (25) mounted in a semi-circular receptacle (24) formed in the fixed support (4) so as to prevent the caliper (1) from tilting about the column (3) when the pads are in place and are locked by the key (20). The invention may be utilized with the brakes of motor vehicles.

Abstract: The drum brake comprise two shoes (12, 14) equipped with friction elements (24, 26) capable of being urged into frictional engagement by an applying mechanism (28) arranged between two first ends (30, 32) of the shoes (12, 14), a fixed anchor block (34) disposed between the other two ends (36, 38) of the shoes, a spacer (44) mounted near the applying mechanism (28) and bearing at each end on one of said shoes, the spacer (44) including a device which lengthens automatically as a function of wear of the friction elements and constituted by a screw-nut system (58, 60) controlled by a pawl (76) mounted on an articulated arm (62) acting on a ratchet wheel (58).

Abstract: The compressor incorporates a front inlet aperture consisting of two annular sectors (11, 12) each having an opening angle of less than 200 degrees, the two annular sectors being essentially symmetrical relative to the plane of intersection of the rotor chambers and seperated from one another by a central portion of an end wall of the casing defining the said annular sectors. The outlet opening (16) is formed in a peripheral wall of the casing and has a general V-shape whose convergent edges are parallel, in projection, to the threads of the respective rotors and whose axial height is less than twice the axial distance between two adjacent rotor threads.