Abstract: An arrangement contains a brake piston for operating at least one disk brake pad and a nut-and-screw unit for producing an axial thrust, from the rear to the front, of the piston containing a nut arranged in the piston's interior, and secured thereto to prevent rotation, and mounted therein to slide axially, whose front axial end face interacts with an internal section facing the piston's front wall to push the piston axially towards the front when the screw is rotatably driven in the unscrewing direction, and the screw containing a front section screwed into the nut, an intermediate radial flange and a rear section, wherein the piston screw contain centering elements that interact with one another when the screw is in a predetermined front axial mounting position in relation to the piston in order to center the rear section of the screw radially in relation to the piston.

Abstract: The invention relates to a motor vehicle master cylinder (1). More specifically, the invention relates to a piston (4, 5) of the master cylinder which has a first indentation (24) and a second indentation (27), which indentations are formed upstream of a port (13, 14) of the piston. The first indentation and the second indentation delimit a space within which hydraulic brake fluid can be stored so that it can be tapped off by an auxiliary braking device of the E.S.P. type.

Abstract: The invention relates to a method for fitting/removing a brake master cylinder (MC) of a motor vehicle providing the installation of a temporary retaining pin (g1) in an access hole (tr1) located on the periphery of the master cylinder (MC) so that the pin (g1) emerges inside the barrel (al1) between the mouth (MCe) of the barrel and either the primary or the secondary piston (pp or ps).

Abstract: The invention relates to a motor vehicle master cylinder (1). More specifically, the invention relates to a piston (4, 5) of the master cylinder which has a first indentation (24) and a second indentation (27), which indentations are formed upstream of a port (13, 14) of the piston. The first indentation and the second indentation delimit a space within which hydraulic brake fluid can be stored so that it can be tapped off by an auxiliary braking device of the E.S.P. type.

Abstract: The invention relates to a brake fluid reservoir comprising at least two lateral mounting lugs (10, 11) designed to be placed either side of a central mounting lug (20) of a brake master cylinder. Collinear holes (12, 13, 21) traverse these lugs and are designed to receive a mounting pin (3). The said lugs include at least one device for the axial immobilization of the mounting pin (3).

Abstract: The invention relates to a method for fitting/removing a brake master cylinder (MC) of a motor vehicle providing the installation of a temporary retaining pin (g1) in an access hole (tr1) located on the periphery of the master cylinder (MC) so that the pin (g1) emerges inside the barrel (al1) between the mouth (MCe) of the barrel and either the primary or the secondary piston (pp or ps).

Abstract: A master cylinder (1) having a bore (3) fitted with at least one piston (4, 5) and at least one seal (19, 20, 21, 22). The seal (19, 20, 21, 22) is partially stiffened by a reinforcement member (25). In order to retain the piston (4,5) in the bore (3) a groove (31) is located on a circumference of the piston (4,5) against which the sealing member (25) bears with the piston (4,5) in a rest position to retain the piston (4,5) in bore (3).

Abstract: An arrangement (10) for the connection of a brake fluid supply reservoir (12) to a longitudinal brake master cylinder (14) of a motor vehicle, in which at least one lower supply pipe (16) connected to the reservoir is received in a complementary supply bore (18) of the master cylinder (14) and in which vertical immobilization structure (20) is interposed between the pipe (16) and the master cylinder (14). The arrangement is by an intermediate baseplate (22) that is connected to the reservoir (12) by at least one nozzle (24) including the supply pipe (16) and that is lowered vertically onto the master cylinder (14) and then immobilized on the master cylinder (14) by way of vertical immobilization structure (20) that directly snap-fastens to the master cylinder (14) to allow rapid attachment of the pipe (16) to the master cylinder (14).

Abstract: The invention relates to a brake fluid reservoir comprising at least two lateral mounting lugs (10, 11) designed to be placed either side of a central mounting lug (20) of a brake master cylinder. Collinear holes (12, 13, 21) traverse these lugs and are designed to receive a mounting pin (3). The said lugs include at least one device for the axial immobilization of the mounting pin (3). Applications: brake fluid reservoir mounting.

Abstract: A master cylinder (1) having a bore (3) fitted with at least one piston (4, 5) and at least one seal (19, 20, 21, 22). The seal (19, 20, 21, 22) is partially stiffened by a reinforcement member (25). In order to retain the piston (4,5) in the bore (3) a groove (31) is located on a circumference of the piston (4,5) against which the sealing member (25) bears with the piston (4,5) in a rest position to retain the piston (4,5) in bore (3).

Abstract: An arrangement (10) for the connection of a brake fluid supply reservoir (12) to a longitudinal brake master cylinder (14) of a motor vehicle, in which at least one lower supply pipe (16) connected to the reservoir is received in a complementary supply bore (18) of the master cylinder (14) and in which vertical immobilization structure (20) is interposed between the pipe (16) and the master cylinder (14). The arrangement is by an intermediate baseplate (22) that is connected to the reservoir (12) by at least one nozzle (24) including the supply pipe (16) and that is lowered vertically onto the master cylinder (14) and then immobilized on the master cylinder (14) by way of vertical immobilization structure (20) that directly snap-fastens to the master cylinder (14) to allow rapid attachment of the pipe (16) to the master cylinder (14).

Abstract: When an element of the electro-hydraulic brake circuit (1) is malfunctioning, a master cylinder (2) can brake the vehicle. A brake actuation simulator (8) is then disconnected from the master cylinder (2) by means of an O-ring gasket (22) after the gasket has been compressed between a groove (16) in a secondary piston (11) and a bore (24) in the master cylinder. In order to prevent the gasket from being extruded from the groove during brake release (or brake pedal release) resulting from sudden braking, the invention makes provision for a pressure relief duct (32) to be provided inside the secondary piston. Extra pressure can then be discharged during brake release (or brake pedal release) through the brake release duct (32) from the inside of the chamber (30) of the simulator towards the primary chamber (10) of the master cylinder.

Abstract: This invention relates to a master cylinder of the so-called “penetration” type, in which a cup (3), which is fitted inside a groove (11) of the master cylinder, bears on the wall (20) of a piston (2) in a sealing manner, and in which such wall (20) is provided with main resupply ports (51). According to the invention, the wall (20) of the piston (2) also comprises secondary resupply ports (52) having a smaller size than that of the main resupply ports (51) and disposed farther from the bottom part (33) of the cup (3), and achieving an outstanding static resupply of the master cylinder with brake fluid, with a reduced dynamic dead stroke.

Abstract: This invention relates to a master cylinder (10), inside a bore (14) of which two axial primary and secondary pistons (16, 18), are slidingly fitted, and in which at least one sealing means (48, 50) is disposed in contact with each piston, defining a supply chamber (56, 60) and a pressure chamber (58, 62). Each piston (16, 18) comprises a bore (78, 80), open in the direction of the front pressure chamber (58, 62), and the piston (18) comprises a valve-forming through-hole (88), opening into its periphery and into its bore (80), in order to isolate the front pressure chamber when it passes beyond the sealing means so as to produce a braking pressure, characterised in that the front pressure chamber (62) associated with at least one piston (18) comprises at least one tubular cylindrical element (90) extending axially outside the piston (18) and rearwards of the sealing means (50) for the obturation of the through-hole (88) according to a reduced stroke (Cm2).

Abstract: A ball-joint connection for a braking system comprising a male element (2) and a female element (4). A first end (14) of the male element (2) includes pegs (30,30?) that are automatically radially extracted when the first end (14) is mounted in a female element (4) defined by a housing (16). The pegs (30,30?) collaborate with the interior surface (18) of the housing (16,66) to define a ball-joint connection between the male element (2) and the female element (4). The female element (4) being formed on one end of a piston (66) of for a master cylinder and the male element (2) forms the actuating rod of the master cylinder.

Abstract: This invention relates to a master cylinder of the so-called “penetration” type, in which a cup (3), which is fitted inside a groove (11) of the master cylinder, bears on the wall (20) of a piston (2) in a sealing manner, and in which such wall (20) is provided with main resupply ports (51). According to the invention, the wall (20) of the piston (2) also comprises secondary resupply ports (52) having a smaller size than that of the main resupply ports (51) and disposed farther from the bottom part (33) of the cup (3), and achieving an outstanding static resupply of the master cylinder with brake fluid, with a reduced dynamic dead stroke.

Abstract: When an element of the electro-hydraulic brake circuit (1) is malfunctioning, a master cylinder (2) can brake the vehicle. A brake actuation simulator (8) is then disconnected from the master cylinder (2) by means of an O-ring gasket (22) after the gasket has been compressed between a groove (16) in a secondary piston (11) and a bore (24) in the master cylinder. In order to prevent the gasket from being extruded from the groove during brake release (or brake pedal release) resulting from sudden braking, the invention makes provision for a pressure relief duct (32) to be provided inside the secondary piston. Extra pressure can then be discharged during brake release (or brake pedal release) through the brake release duct (32) from the inside of the chamber (30) of the simulator towards the primary chamber (10) of the master cylinder.

Abstract: A prestressed resilient device including a spring (1) and a prestressing cage (2) having a variable axial length up to a maximum length (LO) and being inserted inside the spring (1). The cage (2) includes two U-shaped distance pieces (3, 4) that are coupled through their bases that keep the ends (11, 12) of the spring at a maximum distance apart while enabling them to draw nearer to each other.

Abstract: This invention relates to a master cylinder (10), inside a bore (14) of which two axial primary and secondary pistons (16, 18), are slidingly fitted, and in which at least one sealing means (48, 50) is disposed in contact with each piston, defining a supply chamber (56, 60) and a pressure chamber (58, 62). Each piston (16, 18) comprises a bore (78, 80), open in the direction of the front pressure chamber (58, 62), and the piston (18) comprises a valve-forming through-hole (88), opening into its periphery and into its bore (80), in order to isolate the front pressure chamber when it passes beyond the sealing means so as to produce a braking pressure, characterised in that the front pressure chamber (62) associated with at least one piston (18) comprises at least one tubular cylindrical element (90) extending axially outside the piston (18) and rearwards of the sealing means (50) for the obturation of the through-hole (88) according to a reduced stroke (Cm2).

Abstract: A ball-joint connection particularly for a braking system comprising a male element (2) and a female element (4), characterized in that a first end (14) of the male element (2) comprises means (28) that can be radially extracted automatically as said first end (14) of the male element (2) is mounted in a housing (16) of the female element (4. The extractable means (28) collaborating with the interior surface of the housing (16) in such a way as to produce a ball-joint connection between the male element (2) and the female element (4). The male element (2) forming one end of a piston of for a master cylinder and the female element (4) forms the actuating rod of the master cylinder.