Abstract: This device comprises in a manner known per se a valve (7) cooperating with two valve seats (10b, 16a) to control the operation of the booster.The second seat (16a) is formed on a sliding sleeve (16) in such a manner as to accelerate the admission of air and to shorten the response time of the booster.

Abstract: This device, which is intended for vehicles equipped with a brake system comprising a pneumatic brake booster (1) and a master cylinder (2), enables the braked vehicle to be held back on an upslope. It comprises an inclinometric valve (12) which under certain conditions prevents the booster (1) from returning to its position of rest.

Abstract: A combination of a device connecting a yoke (1) and a caliper (2) of a sliding caliper disk-brake includes a key (7) engaged axially in housings of the yoke (1) and caliper (2). The key (7) and one of the housings (10) have non-circular cross-sections and the key (7) is acted upon resiliently by a wire spring (11) of the device so as to reduce the clearance with the housing (10).

Abstract: The invention relates to means for adjusting the jump in a pneumatic braking assistance servomotor, said means including a cup (50) encircling the reaction disk (11) and a radial widening (13) integral with the push-rod (12). The adjustment is carried out by partial screwing of the cup in the piston or recoil of the push-rod without initial strain of the reaction disk (11).

Abstract: The ball and revolving plate (1) clamping device uses guide cavities each comprising a housing (7a) which determines a single position for the ball (3), and a ramp (7b) which is connected to the housing (7a) by way of a plurality of points of intersection (7c) situated on a slope discontinuity. This arrangement enables the clamping force to be optimized.

Abstract: A distributor for controlling the distribution of fluid to a brake system which includes an anti-lock and an anti wheelspin function and in particular functional operation during a brake condition wherein the front wheels are actuated at the same time a single back wheel is actuated.

Abstract: A pneumatic brake booster has a thrust rod (13) guided by a sleeve (16) supported by a hydraulic piston (14) of a master cylinder (2). The thrust rod has a thrust washer (15) fixedly attached, which bears against a flat bottom of a cup (12) housing a reaction disc (11). The thrust washer is able to slide relative to the flat bottom.

Abstract: This drum-brake device is equipped with an automatic clearance adjustment device comprising a click (12) actuating a toothed wheel (11) whose rotation gives rise to the lengthening of a spacer (9) disposed between two brake segments (1) and (2). The click is controlled by a linkage (16, 17, 18) sensitive to any relative motion of the shoes.

Abstract: The present invention relates to an assembly comrising a bulkhead (10) separating an engine compartment from a passenger compartment of a vehicle and a pneumatic booster (12) assisting the braking of the vehicle and comprising essentially a tube into which an operating rod (16) actuated by a brake pedal situated in the passenger compartment penetrates and a closed casing defining the pneumatic chambers of the booster disposed in the engine compartment. According to the invention the tube (14) is fastened to a collar (18) which has a diameter substantially smaller than that of the opening; the collar (18) is shaped in such a way as to have, at least in part, an end wall (20) parallel to the bulkhead; the collar (18) has a peripheral groove housing a ring (22); the ring (22) has, at least in part, an elastic edge (24) projecting outwards.

Abstract: The invention relates to a pneumatic brake-booster comprising a casing (10) inside which is a piston formed of a back tubular part (22) supporting a skirt (14) and which, with the aid of an unrolling membrane (12), defines a front chamber (16) connected permanently to a source of partial vacuum and a back chamber (18) connected selectively to the front chamber (16) or to the atmosphere via a valve (40) actuated by a control rod (34) capable of bearing, through the intermediary of the front face of a plunger (32), on a first face of a reaction disk (58) securely attached through a second face to a thrust rod (56). According to the invention, the piston (20) bears against the reaction disk (58) through a resilient annular front face (68, 68').

Abstract: The invention relates to a pressure-regulating device for a hydraulic circuit, especially for a brake circuit of a motor vehicle, comprising at least one source of fluid under pressure (10) connected to a reservoir of fluid under low pressure (16) and, in at least one subcircuit (I, II), a second source of fluid under pressure (50) and two pressure receivers (20, 22). According to the invention, a proportional solenoid valve (24, 26) is associated with each pressure receiver (20, 22) and is connected to the source of fluid under pressure (10) and to the second source of fluid under pressure (50), and a differential pressure/vacuum valve (100) closes, at rest, communication between the source of fluid under pressure (10) and the supply of the second source of fluid under pressure (50), this communication being opened when the second source of fluid under pressure is put into operation.

Abstract: The present invention relates to a friction member comprising a support plate (26, 30) and a friction element (22, 24) arranged on one side of the support plate 26, 30), the friction element (22, 24) being adapted to engage one face of a rotating member (12), and at least one wear indicator (32) associated with the support plate (26, 30) so as to generate an audible signal when the friction element (22, 24) possesses, on account of its wear, a predetermined thickness (L). According to the invention, the wear indicator (32) is formed by a spring comprising an intermediate part (34) for fixing of the wear indicator (32) onto the support plate (26, 30) on the side of the latter which bears the friction element (22, 24), a first end part (36) for emission of the audible signal and a second end part (40, 50, 36') for locking of the wear indicator (32) in rotation with respect to the support plate (26, 30).

Abstract: The invention relates to a solenoid valve, in particular for a hydraulic braking circuit of a motor vehicle with a wheel antilockup device, the solenoid valve being disposed between at least a pressurized fluid source (52) and at least a pressure receiver (56) and comprising, in a body (10), a piston mechanism (24) which can be displaced between a rest position, in which it permits communication between the pressurized fluid source (52) and the pressure receiver (56), and a work position, in which it permits communication between the pressure receiver (56) and a low-pressure fluid reservoir (66). According to the invention, the piston mechanism (24) is permanently stressed toward the rest position by a constant force.

Abstract: The drum brake has two shoes (12, 14), each presenting a web (16) and a rim (18) whose face facing the drum receives a friction lining (20). The drum brake is arranged on a support plate (10), and the web (16) of each shoe (12, 14) possesses a notch cooperating with a strut (40) determining the separation of the shoes (12, 14). The strut (40) bears in the neighborhood of one of its ends (50) a pivot (52) on which is articulated an actuating lever (46) extending substantially perpendicular to the support plate (10) through an opening (54) made in the latter in hinged and capable of cooperating with one of the shoes. The actuation of the drum brake is obtained by a simultaneous action and reaction on the actuating lever (46) and on the strut (40).

Abstract: The invention relates to a brake regulator interposable between a hydraulic pressure source and a motor-vehicle brake circuit, of the type comprising a housing equipped with a bore, a simple or differential piston sliding in the bore and delimiting there a first (18) and a second (20) pressure chamber capable of being connected to the pressure source and to the brake circuit respectively, the chambers (18, 20) communicating with one another by means of a passage made in the piston, a valve mounted in the passage and stretched elastically to bear sealingly against a seat formed on the piston, and a return boring interposed between a movable element, the position of which varies as a function of the load of the vehicle, and the piston, so as to stress the latter toward the bottom of the second chamber (20), in a rest position in which the valve is set apart from its seat by a stop (30).

Abstract: Device for automatically taking up the play in a braking mechanism comprising a cylindrical piece (30) rotatably movable about its own axis (x--x'), of which the rotation over a fraction of a revolution is ensured by a control member (41) able to pivot alternatively in one direction and the other, its pivoting taking up the play. The control member acts on said cylindrical piece by the intermediary of a spring-wire (38) rolled around the latter, in such a fashion that when it presses the spring-wire in one direction it engenders its tightening on the cylindrical piece and correspondingly the driving of the latter by friction, while in the other direction it engenders the release of the spring-wire and correspondingly its disengagement with respect to the cylindrical piece, the latter not being driven.

Abstract: The invention relates to a flow limiter for hydraulic fluid, comprising at least one passage (14) of reduced cross-section for the hydraulic fluid, the passage (14) being formed between two contiguous pieces (12, 22) each having at lest one planar face (10, 20), at least one of the two pieces (12, 22) comprising a recessed impression (14) on at least one of its faces (10, 20), the passage (14) of reduced cross section being defined within the space situated between the recessed impression (14) formed on a planar face (10) on one of the pieces and the planar face (20) of the other piece (22), the length of the passage (14) of reduced cross section being adjustable by varying the relative position of the two pieces (12, 22). According to the invention, a pierced hole (18) is made in one piece (12) at one end of the passage (14) of reduced cross section and in that a pierced hole (24) is made in the other piece (22) at the other end of the passage (14) of reduced cross section.

Abstract: The invention relates to a hydraulic device for braking the wheels of a vehicle, especially for wheel anti-lock and/or anti-slip functions, comprising, between a chamber of a master cylinder and at least one brake motor, a plurality of solenoid valves (36) and a hydraulic pump driven by an electric motor including a rotor (10) arranged between two bearings (12, 14) and enclosed in a cylindrical sleeve (20) made of metallic material, the rotor driving in rotation an eccentric cam (24) imparting an alternating translational movement to radial pistons (26), the delivery outlet of the pump being connected to the solenoid valves (36) via hydraulic slides by way of fluid circulation channels (32, 34). According to the invention, the sleeve (20), in which the rotor is accommodated, is enclosed in a housing (30) made of non-magnetic material. The fluid circulation channels (32, 34) and the solenoid valves (36) extend in the housing.

Abstract: The invention relates to a pneumatic brake-booster comprising a casing (10), inside which is situated a piston (20) comprising a rear tubular part (22) and a movable wall (12) defining a front chamber (16) permanently connected to a vacuum source and a rear chamber (18) selectively connected to the front chamber (16) or to the atmosphere by a valve mechanism (20a, 32a, 40) actuated by a control rod (34) adapted to bear, by way of a plunger (32) against one face of a reaction disk (58) fastened to a push rod (56), the valve mechanism comprising a valve closure member (40) cooperating by an active part with a first valve seat (32a) formed on the plunger (32) and with a second valve seat (20a) formed on the piston (20). According to the invention, a guide mechanism (62) for the air in movement are provided upstream of the valve mechanism.

Abstract: The invention relates to a brake-booster (10) of a vehicle, comprising a casing (12) and a diaphragm (14) which divides in a sealed manner the interior of the casing into a front chamber (16) and a back chamber (18), a hollow piston (20) movable in the casing receiving an input member (24) adapted to be connected to a brake pedal, an output assembly comprising a lid (30) and an output rod (32) adapted to be connected to a piston (34) of a master cylinder (36), a reaction disk (28) in a deformable material arranged between the hollow piston (20) and the lid (30) so as to receive an image of the output force of the booster (10) when it is put into operation in order to cause a deformation of the reaction disk (28) tending to push back the input member (24) as a function of the image.