Abstract: A control arrangement is of the type comprising a control transmission chain which includes a cable (10), an actuating member such as a pedal (12) connected to one end (14) of the cable, and possibly a system of levers interposed between the other end (18) of the cable and a receiving member (28) such as a friction clutch, the flexible sheath being anchored in the vicinity of one of its ends (34) to a fixed part of a support structure (13). The end portion (36, 48) of said sheath in the vicinity of its other end (37) is mounted with the possibility of axial movement in a fixed support (38) which is fixed with respect to said support structure. A device (40) for momentary blocking of said axial movement is interposed between said end portion (36, 48) of the sheath and said fixed support (38), the blocking device (40) comprising a control member (74, 42) coupled to a point on said control transmission chain.

Abstract: The brake comprises a caliper (14) mounted for sliding on a fixed support by two axial columns (16 and 18) cooperating with bores (38, 40) formed in the caliper. The bores (38, 40) are provided with notches (42, 44) permitting the introduction of the columns (16, 18) transversely and without dismounting the latter. One of the columns (16) is equipped with a resilient sleeve (51) on which there is formed a projection (52) cooperating resiliently with the corresponding bore (38) of the caliper (14) to ensure functions of automatic recentring of the caliper and of anti-noise spring.

Abstract: The correcting valve comprises two identical parallel pistons which control the opening or closing of two valves which are disposed between two inputs and two outputs of two braking circuits. Two thrust members which are subjected to a control pressure urge the pistons in the direction for opening the valves. Two reaction springs co-operate with two transmission members for urging the thrust members in the opposite direction. When the two brakes circuits are supplied, the correcting valve has an identical cut-off pressure for the two circuits. In the event of failure of one of the circuits, the transmission members come into mutual engagement, resulting in a doubling in the cut-off pressure in the circuit which is still intact. The invention is used for dual-circuit braking systems for motor vehicles.

Abstract: Servo unit provided with an internal bracing member which is stressed upon assembly, permitting mounting thereof to a vehicle by means of only two fixing screws. The bracing member has an initial shape which is curved in a given direction, forming a clearance between the inside face of the mounting wall and two regions of the bracing member against which the screws bear. The clearance is eliminated when the bracing member is pressed against the inside face at the moment of definitive fixing of the screws with respect to the casing. The bracing member of the invention provides for better distribution over the whole of the inside face of the braking reaction forces which are applied to the casing.

Abstract: The corrector comprises two identical parallel pistons which control the opening and closing of two valves located between two inlets and two outlets of two braking circuits. Two push rods subjected to a control pressure urge the pistons in the direction for opening the valves. A reaction spring cooperates with a transmission element to urge the push rods in the opposite direction. When both braking circuits are being supplied, the corrector presents an identical cut-off point for the two circuits. In the event of one of the circuits failing, the transmission element undergoes tilting which results in an unequal sharing of the reaction force and an increase in the cut-off point in the undamaged circuit.

Abstract: The Compensator is of the type in which the cut-off point is defined by measurement of the pressure of the brake liquid trapped in a pilot chamber when the latter is isolated by closure of a valve associated with a mass which is responsive to the deceleration of the vehicle and which is urged by resilient means towards a position corresponding to the opening of said valve.It is characterized in that it comprises means responsive to the braking pressure, which modify the calibration of said resilient means as a function of said pressure.The braking compensator is applicable to braking systems for motor vehicles.

Abstract: Hydraulic actuating apparatus with digital input comprising a movable output member spring biased to a neutral position and capable of moving to one or other of two working positions under the effect of opposing hydraulic means, themselves controlled by binary-type control members;To create two additional working positions for the movable output member (10), the invention provides for each of the driving means to be composed of two active areas (s.sub.1, s'.sub.1 ; s.sub.2, s'.sub.2) acting successively on the output member (10), and for the putting of the first area under pressure to be caused by one of the control members (EV.sub.1, EV.sub.2) while that of the other area is caused by the other control member provided that the output member has already completed a first displacement step in the required direction;Particular application to the control of double-acting hydraulic actuators with two rates of displacement in each direction.

Abstract: The articulated joint consists of a spherical ball with a stem which is assembled to pivot in a housing by means of a bearing member made from plastics material having an annular flange supported by a closing washer and provided with a series of slots which subdivide it into petals arranged between the ball and the bottom of the housing. The petals are in the form of wedges and are loaded by elastic elements made of the same material as the spherical ball race and which bear on the annular flange to ensure the preloading and automatic taking up of play.

Abstract: An absolute-control numerical hydraulic actuating device with display of the output position, comprising a hydraulic jack, a distributor formed with orifices and a selector connected to the orifices in order to make the required hydraulic connections for hydraulic locking in the desired output position.According to the invention, the orifices of the distributor can be selectively connected by the selector to the active chamber of the jack in order hydraulically to lock the output positions in accordance with numerical orders supplied to the selector, and additional intermediate locking positions are created by the provision of additional rows of orifices which can be selectively connected to the high-pressure source, to the low-pressure source, or to the active chamber of the jack through a further selector.

Abstract: The tandem master cylinder is provided with an equalizer device comprising a plunger mounted intermediate two chambers which are respectively connected to the two cavities of the master cylinder. At least one of the ducts connecting the master cylinder and the equalizer device is formed with a constriction slowing down the flow of brake fluid so as to permit a pressure buildup in one of the braking circuits, in case of failure of the other circuit, since the very start of the pedal stroke.

Abstract: A wheel cylinder comprises a bore closed by two pistons which define a pressure chamber therebetween. The pressure chamber is divided into two compartments by a partition member placed in the bore and which comprises a passage communicating the two compartments. One of the compartments is connected to a source of pressurized fluid and a control valve is mounted in the passage for controlling the pressure in the other compartment as a function of the pressure in the one compartment, whereby the wheel cylinder acts as a proportioning valve.

Abstract: The invention is a method of assembly for a ball-and-socket joint of the preloaded type with automatic taking up of play, comprising a housing, a pivot, a bearing element disposed between these later and a locking ring. After the disposing in the housing of the various components of the joint, the latter is axially loaded until a predetermined value is obtained for the tilting torque, and once this value is obtained, the ring is crimped in the housing by means of punches acting radially, without alteration of the predetermined value of the tilting torque. Application of the ball-and-socket joint assembly in particular for suspension or steering of an automobile vehicle.

Abstract: A solenoid valve comprising a housing having opposed inlet and outlet ports which communicate via a passage containing a poppet member movable in response to energization of a coil is disclosed. A flexible wall is further provided in said passage to define inlet and outlet chambers communicating respectively with said inlet and outlet ports. A second passage in said flexible wall connects said chambers, and a resilient spring urges a valve seat defined in said second passage into fluid tight engagement with the poppet member, whatever the position of the latter. The poppet member is movable between a first position in which it urges the wall against an abutment, thereby preventing any communication between the inlet and outlet ports, and a second position in which the wall is movable relative thereto, whereby said wall acts as a non-return valve between the inlet and outlet ports.

Abstract: In a hydraulic circuit breaker comprising a housing with an inlet orifice connectable to the outlet of a hydraulic pump, a first outlet orifice connectable to the pressure chamber of a hydraulic pressure accumulator, and a second outlet orifice connectable to an open-center hydraulic circuit, a stepped bore in said housing, a piston of the differential type slidable in a fluid-tight manner in said bore and defining therewith an inlet chamber communicating with the inlet orifice and a control chamber, a constriction orifice of variable cross-section being provided between the inlet chamber and the second outlet orifice, and said inlet chamber communicating with said control chamber through a first passage comprising a first restriction and being also connected to the first outlet orifice by a connection comprising a non-return valve, there is further provided a resilient vessel having a variable-volume compartment connected to said control chamber, said vessel being adapted to connect said compartment to a sec

Abstract: A tool comprising a receptacle having a cylindrical portion defining a space therewithin adapted to receive a resilient seal after deformation of the latter by an external member is disclosed. A movable member carried by said receptacle comprises a tubular portion slidably received on the cylindrical portion and movable from a first position in which said tubular portion is opposite the space towards a second position in which said tubular portion is offset relative to the space against the action of a first spring. The tubular member is provided with an aperture adapted to receive the external member, and an element is slidably carried in said space and resiliently urged away from the latter by a pair of second springs, thereby expulsing the seal in a corresponding groove when the tubular member is moved towards its second position.

Abstract: A disc brake includes a caliper which receives two friction elements. Opposed edges of a friction element and the caliper respectively define a gap therebetween. A noise reducing spring of the brake includes a pair of resilient opposed arms. The resilient arms of the spring fit into the gap and cooperate with the gap-defining edges to reduce brake noise. A mounting pin carried by the caliper supports the friction elements therein. An aperture defined by the spring receives the mounting pin so that the spring is pivotally mounted relative to the caliper and friction elements. Upon installation, the spring is placed in its inoperative position with its resilient arms disposed away from the gap. After the friction elements and mounting pins are in place, the spring is pivoted into place and a tab of the spring snaps into a recess of the caliper to lock the spring in its operative position.

Abstract: A braking correction device has a stepped bore which is divided into an inlet chamber and an outlet chamber by a piston. A control valve is disposed in a passage of the piston and is normally open when the piston occupies a rest position. When the pressure in the inlet chamber rises, the control valve remains open until such pressure has reached a predetermined value, and fluid communication between the inlet and outlet chambers through said control valve is metered when the pressure in the inlet chamber increases above said predetermined value. The piston is urged towards its rest position under the influence of a return force delivered by a control member connected to the suspension of the vehicle, and abutting the piston at its outer end. The inlet and outlet chambers can also communicate by a passage defined between the outer periphery of the piston and the inner surface of the bore.

Abstract: A hydraulic vehicle braking system including an operator-controlled fluid pressure source connected to the actuator of a vehicle wheel brake. An antiskid valve is interposed between the operator-controlled pressure source and the brake actuator and is responsive to wheel skidding to interrupt the fluid connection until the end of the braking phase and to permit a fluid connection between the brake actuator and a low pressure fluid reservoir in response to subsequent wheel skidding. The system includes a second source of pressurized fluid and a device for replenishing the brake actuator having a pressure responsive valve which opens fluid flow connection between the second fluid pressure source and the brake actuator when the pressure difference between the operator-controlled pressure source and the brake actuator exceeds a predetermined value.

Abstract: The invention relates to a fluid reservoir with two compartments, more particularly for supplying hydraulic fluid to tandem master cylinders, this reservoir more specifically comprising two complementary, superjacent parts connected with adhesive, by thermowelding or by any other equivalent method, a central partition attached to the said parts and running across the longitudinal axis of the reservoir to divide the reservoir interior into two compartments having respective outlet orifices, at least one compartment also having a filler orifice, and the two compartments being interconnected by a transfer passage which extends into both of them and runs parallel to the surface of the fluid in the reservoir and substantially at the maximum level for this fluid. The transfer passage enables the hydraulic fluid to pass from one reservoir compartment into the other when the reservoir is filled with hydraulic fluid.

Abstract: A friction brake is equipped with an automatic adjuster (40, 44) and with a device (84, 86) indicating wear of the friction lining pads. The indicating device is associated with a movable member of the automatic adjuster and is also controlled by the automatic adjuster. The indicating device comprises a flexible blade (84) adapted to engage a rough cylindrical surface (86) formed on the hub (88) of the wheel associated with the brake.