Abstract: Multiple disc brake comprising a first rotary disc fixed to a hub connected to a rotating member to be braked and at least one second rotary disc capable of sliding axially relative to the hub and to the first disc, while at the same time being made integral in terms of rotation with the first disc. The connection between the second disc (2) and the hub (3) is made by way of at least two axially sliding shoes (22) which are uniformly distributed over a circle and which are each accommodated in an axial receptacle (23) of a cross-section matching that of the shoe (22). The invention is used on a multiple disc brake for motor vehicles.

Abstract: The brake pad (10) comprises a lining (8), a lining support (11) and a spring (15) fastened at (17) to the support (11) near one edge of the support. The two free ends of this spring are shaped so that each forms a mechanism for attachment (23, 24, 25; 23', 24', 25') of the pads. These two free ends grip two adjacent bearing surfaces formed on the caliper of the disc brake equipped with this pad. The invention is used for the preassembly of pads in a disc brake incorporated in the stub axle of the vehicle wheel.

Abstract: The friction member (4a) is actuated, via a piston mechanism (5), by an assembly consisting of a wedge (12) and of rollers (14), put into operation as a result of the rotation of a control shaft (11) driven by an electric motor (8) under the supervision of a force or pressure sensor (23) associated with one of the surfaces of ramps (16) interacting with the rollers (14).

Abstract: Hydraulic booster comprising a housing provided with a bore inside which there is slidably mounted two pistons each associated with a respective pressure chamber intended to be connected to a respective brake circuit; an actuating piston slidably mounted inside the bore and intended to be displaced by a brake pedal, displacement of the actuating piston being capable of causing displacement of the two pistons; and two valve mechanisms each associated with a respective brake circuit and intended to control the flow of pressurized fluid from a respective source to the brake circuit, characterized in that the two valve mechanisms are arranged parallel to the bore and are intended to be actuated simultaneously by the actuating piston.

Abstract: The rotating member (17) of the automatic adjustment device interacts in frictional engagement with a non-rotating plunger (8) of the mechanical control device (9), the adjustment member locked in rotation (18) of the automatic adjustment device having an end (19) passing sealingly and slideably through the front wall (4) of the brake piston (1) and maneuverable (38) manually to carry out resetting of the automatic adjustment device, the adjustment member locked in rotation (18) being pushed in frictional connection (30, 31) with the brake piston (1) to be normally locked in rotation when the brake motor is in operation.

Abstract: The movable wall structure (4, 5) dividing the housing (1) of the booster on the inside possesses a metal plate (4) having a central annular part (6), to which are fixed a stepped tubular insert (9) protecting the reaction disk (25) and a rear tubular element (8), in which is mounted a plastic body part (7) forming communication ducts (16, 23) for the distributor valve mechanism of the booster.

Abstract: The brake motor comprises an inserted piston (26) slideably mounted in a passage (24) formed in the front wall (4) of the brake piston (1) which has, near the other end (31) of the inserted piston (26), a counter-bearing surface (34) facing inward, thus enabling the engagement of an actuating tool (0) to exert, via the inserted piston (26), an axial thrust on the rotating member (16) of the automatic adjustment device of the brake motor and, at the same tine, an axial load in the opposite direction on the brake piston (1) enabling the friction clutch (18, 19) to release between the brake piston (1) and the rotating member (16), after which an axial translation (F) of the assembly enables the resetting of the automatic adjustment device of the brake motor.

Abstract: Securing device for concentrically mounting a helical spring on a rod having a transverse abutment surface and a groove, the securing device being elastic and capable of being mounted on the rod and comprising a part intended to be received in the groove and an inclined surface forming an apex which, when the securing device is mounted on the rod, defines a point at a maximum distance from a longitudinal axis of the rod and is located at a predetermined distance from the abutment surface, the spring having an internal radius less than the maximum distance and being made from a substantially cylindrical wire, the radius of which is less than the predetermined distance.

Abstract: The valve member (5) of the distribution valve mechanism of the booster comprises an active part (19), cooperating selectively with the valve seats (18; 17) in the hub (8) of the piston (2) and on the valve plunger (13), and an axial undulated tubular part (24) mounted, by its rear end, on an internal end (26) of a valve-member support (27) forming bearing zones (282; 281) for a spring (31) causing the return movement of the input rod (14) and for a spring (30) biasing the valve member and mounted, by its external periphery (29), in the tubular hub (8).

Abstract: The stop member (23), which forms a bearing surface (33) cooperating in abutment with an abutting member (22) carried by the actuating rod (13) of the booster so as to determine the operational dead travel of the booster, has a deformable structure (30) capable of yielding elastically when a pulling force (F) exerted axially by the abutting member (22) on the stop member exceeds a predetermined value. The deformable structure advantageously consists of at least one arm (30) integral with a mounting sleeve (28), fixed by crimping (37) onto the rear central duct (9) of the rear shell (2) of the booster housing. The abutting member (22) is secured, in a given position, to the coupling fork (15) of the actuating rod (13).

Abstract: The invention relates to a safety device for disc brakes. The purpose of the device is to prevent the accidental disassembly of a column forming part of a sliding-caliper disc brake. A cap 51 is rotatably coupled with the head of a bolt 48 forming part of the column and screwed onto a stationary support. The cap has a skirt 59 with a cutout 60 in the shape of an arc of a circle, bounded by stops 50, 50'. In the case of accidental unscrewing of the bolt, one of the stops 50, 50' comes to rest against a stationary part 24 of the brake to prevent further unscrewing. Application to the braking of motor vehicles.

Abstract: The booster comprises, in a radial opening (21) of the valve body (6), a first positioning member (22) fastened in the valve body and a second positioning member (23) interposed between the first positioning member and an interacting shoulder (19) of the valve plunger (14), the second positioning member (23) internally associated in a hinged connection with the first positioning member and having an outer end zone (30) interacting, in a rest position of the booster, with a stationary surface (31), with which the piston structure (2-5) also interacts by coming up against it, to assign to the valve plunger (14) a specific rest position relative to the valve body (6).

Abstract: The booster comprises a positioning member (24) for placing the distribution valve mechanism (12, 13, 14) in a specific rest position in the rest position of the booster, the positioning member (24) being coupled to one end (28) of a retractable elastic member of low elasticity (29), advantageously a spiral spring, which is deformable between a relaxed configuration and, in the rest position of the booster, a retractable configuration, in which the end (28) is located in a fixed reference position relative to the housing (1) of the booster, determining the rest position of the positioning member (24).

Abstract: The invention is in the field of electrical switching. The contactor includes a control member (5) which moves in translation and is placed between two bars (12) and (13) made from an electrically conducting material. The control member includes a monobloc part interposed between the two bars and has bearing surfaces (5', 5") enabling the control of the pivoting of the bars about axes perpendicular to the translation axis of the control member (5), to produce a sequential opening or closing of one set of pairs of contacts (8, 11) and of another set of pairs of contacts (9, 10). The invention is applicable to the control of the electrical powering of a pump to maintain the pressure of a fluid within a predetermined range.

Abstract: The assembly spring consists of a V-shaped elastic metal wire (R1), one end of one branch (61) of which forms a hook (71) which ensures the retention of the pivot (52) of the lever (50), the branch (61) passing through a passage (81) provided in a spacer (44), in order to stress it elastically toward the lever (50) in interaction with the other branch of the V (91) which has a mechanism (101) of anchoring on the web (18) of the shoe (14) carrying the lever (50). The anchoring mechanism consists of a wire portion (101) bent at 90.degree. relative to the plane of the V and interacting with the web (18) of the shoe (14) and the lever (50) adjacent it, to constitute a mechanism forming a stop. The invention is used for the braking of vehicles.

Abstract: The booster comprises a first member (23) positioning the plunger (14) and fastened in the valve body (8) and interacting with a the first zone of a shoulder (21) of the plunger to position the latter in a specific position of maximum retraction relative to the valve body (8), and a second member (29, 31) positioning the plunger and mounted pivotally in the valve body and having a ramp surface (34) formed in a first portion (29) interacting with a second zone of the first shoulder (21) to position the plunger in a specific position of rest relative to the valve body (8) under the control of a second outer portion (31) interacting with a stationary element connected to the housing (9).

Abstract: The subject of the invention is a control device (10) for a twin master cylinder of the type with two master cylinders positioned parallell to one another and side by side, the device (10) being capable of being positioned between an actuating pedal and the pistons of the masters cylinder, the device (10) incorporating a control rod (44) which is capable of being connected to the pedal and two pushrods (28, 28') which are each capable of acting upon one of the pistons, the pushrods (28, 28') being guided so as to slide parallel to the axes of the master cylinders. According to the invention, the control rod (44) cooperates with the push rods (28, 28') through levers (52, 54) each of which is hinged at one end (56, 58) to one of the rods (28, 28') and is pushed so as to bear at the other end (64, 66) upon a bearing surface (62, 60) of the other rod (28', 28) by means of a peg (80) which is firmly fixed to the control rod (44). Application to the braking systems of motor vehicles.

Abstract: The brake motor subassembly with automatic play compensation limitation by way of a stepped pilot piston (20), comprising a first cylindrical peripheral surface of larger diameter (21) sliding in an inner bore (7) of the control piston (1) and a second cylindrical peripheral surface of reduced diameter (24) interacting sealingly slideably with an annular gasket (17) in the piston (1), has an intermediate radial shoulder (26) which, during the movement of the pilot piston (20) because of the opposing effective cross-sections (s.sub.1, s.sub.2), interacts with the annular gasket (17) so as thereby to present a new effective surface (s.sub.3) preventing the continuation of the movement of the pilot piston (20) and thus avoiding the compression of the elastic member (11) which normally stresses the automatic compensation nut (14).

Abstract: Variable-ratio braking corrector for a vehicle, comprising a housing provided with at least two parallel bores (14, 16), at least two pistons (24, 26) one mounted slideably in each bore, the two pistons projecting from the housing and cooperating with the two ends of a rocker (28) mounted in an articulated manner relative to the housing (12), the hinge pin (48) of the rocker (28) being displaceable by means of a mechanism connected to the vehicle suspension, to vary the ratio of the corrector as a function of the vehicle load, characterized in that the corrector also comprises a reversible escape device (50) in the mechanism, comprising at least two elements (52, 58) coupled pivotably to one another, one (58) being coupled to the hinge pin (48) and the other (52) being stressed toward a rest position by a spring mechanism (60).

Abstract: The solenoid valve body (3), which is firmly fixed to a transverse connection terminal block (4), comprises a through core (5, 6) whose ends (7, 8) project on each side of the body (3), the latter being positioned and held in an internal cavity (2) of a casing member (1) consisting of a single piece by an assembling member (16) which cooperates with one end (8) of the core and holds the other end (7) of the core so that it bears against an internal bearing surface (15) of the cavity (2), the terminal block (4) extending sealingly through an opening (9) of corresponding dimensions which is formed in a lateral wall (10) of the casing member (1).