Abstract: A drum brake having an adjustable-length strut (6) to compensate for clearance due to wear between first (21a) and second (22a) friction members and a drum (1). The adjustment being achieved by the rotation of a toothed wheel (7) driven by an adjustment blade (51) mounted on a rocking lever (5). The rocking lever (5) has an inhibitor blade (52) which intercepts the toothed wheel (7) whenever a risk of excessive adjustment occurs by disengaging the adjustment blade (51) from the toothed wheel (7). The inhibitor blade (52) prevents subsequent rotation of the toothed wheel (7) until the risk of excessive adjustment dissipates.

Abstract: A drum brake assembly (10) having first (12) and second (14) brake shoes retained on a backing plate (16). The first (12) and second (14) brake shoes have a first end (22,24) aligned on a hydraulic actuator assembly (26) and a second end (28,30) aligned on an anchor block (40). An adjustable strut mechanism (32) has an extendable shaft (33) with first end member (34) which engages the first brake shoe (12) and a second end member (36) which engages the second brake shoe (14). The first end member (34) is separated from the second end member (36) by a stem member (35). Stem member (35) has a threaded first end (39) which is mated with the second end member (36) and a smooth second end (31) which is retained in a bore of the first end member (34). The first (12) and second (14) brake shoes are urged toward the hydraulic actuator assembly (26) by a first resilient member (150) and toward the anchor block (40) by a second resilient member (48).

Abstract: A device for the quick assembly and disassembly of an input rod (1) for operating a brake system and a brake pedal. A clasp (3) is secured to the input rod (1) connecting a spindle (4) fixed to the brake pedal. The clasp (3) has a guide yoke (31) which receives a retaining yoke (32) and blocking members (51,61) which maintain the retaining yoke (32) in a closed configuration with respect to the guide yoke (31). The blocking member comprise at least one lug (51) borne by the retaining yoke (32) which projects toward the guide yoke (31) and opening (61) in the guide yoke (31) which receives the lug (51) with the clasp (3) in moved to a closed configuration. On movement of the clasp (3) toward a closed configuration, parallel cheeks (325,326) of retaining yoke (31) which are squeezed together elastically expand when lug (51) enters opening (61) to lock the clasp (3) in the closed configuration.

Abstract: A control apparatus (12) for a brake system (10) having a housing (40) with a first (42) and second (46) cylindrical members located in first (44) and second (46) bores. The first (42) and second (46) cylindrical members and corresponding first (50) and second (54) valve seat members define first (52) and second (56) chambers within the first (44) and second (46) bores which are connected to a source of pressurized fluid. First valve means (68) are located in the first chamber (52) and second valve means (70) are located in the second chamber (56). A first plunger means (72) in the first bore (40) and a first valve seat member (50) define a first brake chamber (74) which is connected to a first set (16) of wheel brakes and a second plunger means (76) in the second bore (48) and a second valve seat member (54) define a second brake chamber (78) in the second bore (46) which is connected to a second set (16′) of wheel brakes in the vehicle.

Abstract: The invention relates to a master cylinder with hydraulic reaction, comprising a working chamber (12) in which there slides a hollow main piston (13) inside which a reaction piston (14) delimits a reaction chamber (15) which communicates with the working chamber (12) through at least one non-return valve (22). According to the invention, the non-return valve (22) is installed on a floating stepped piston (23) using the kind of assembly used in brake pressure regulators, so as to limit the reaction force applied to the reaction piston (15).

Abstract: A master cylinder (32) in a vehicle hydraulic braking installation uhydraulic-fluid supply device for actuating wheel brake cylinders (20). The master cylinder (32) being isolated from the wheel brake cylinders (20) by at least one shut-off valve (30). The master cylinder (32) being associated with a simulator (46) having a piston (50) located in a simulator chamber (56). The piston (50) being subjected to fluid pressure of brake fluid from the master cylinder (32) and an elastic element (52). The master cylinder (32) being of the having a primary piston (44) and a secondary piston (60) slidably located in a bore (45) of a housing (48). Bore (45) has a peripheral groove (72) which is associated with a land (68) on the secondary piston (60) to allow communication with the simulator chamber (56) when the master cylinder (32) is in a positon of rest.

Abstract: A brake booster having a front shell joined to a rear shell with the interior separated by a wall to at least define a first front chamber and a first rear chamber. A reinforcement plate located adjacent an end face of the front shell has a plurality of studs for attaching a master cylinder to the front shell. First and second tubes which extend through the wall each have having a first end sealed with respect to the front shell and a second end sealed with respect to the rear shell. A fastener arrangement extends through the first and second tubes for attaching the brake booster to a wall of a vehicle. The fastener arrangement is characterized by first bushing members located between the front shell and reinforcing plate and a second bushing members secured to the rear shell. The first bushing members each including a first cylindrical body which have a stepped bore defined by a first diameter separated from a second diameter by a first shoulder.

Abstract: A braking device having a pneumatic booster (2) having a rigid casing (3) defined by a front shell (31) and a rear shell (32). The interior of the rigid casing (3) being separated into a front chanber (33) and a rear chamber (34) by a movable partition (5). The booster (2) is reinforced by a strut (4) with a screw (40) which passes through the front shell (31), movable partition (5) and rear shell (32). The screw (40) has front end (41) and a rear end (42) separated from an intermediate cylindrical section (43). A sleeve (7) which extends from the rear shell (32) receives the second end (42) of the screw (40) and allows the screw (40) to axially slide with respect to the rear shell (32). A stop (61) on the intermediate section (43) prevents the second end (42) from projecting from the rear shell (32) until the first end (41) is rotated into engages the front shell (31) and threads on the second end engage corresponding threads on a support (1) to fix the booster (2) to the support (1).

Abstract: A pneumatic brake booster for a motor vehicle having a rigid casing (1) with a moving partition (2) to define a front chamber (11) and a rear chamber (12) therein. A pneumatic piston (3) carried by the moving partition (2) has a bore which retains a three-way valve (6). The three-way valve (6) is connected to an actuating rod (4) which acts on a plunger (5) to connect the front chamber (11) to the rear chamber (12) with a first pressure in a rest position and connects the rear chamber (12) to a second pressure in an actuation position. In the actuation position, a pressure differential develops across the movable partition (2) to create a boost force which is transmitted to a push rod (7) through a reaction disc (9) retained in a cup (8) to develop a braking force in response to an input force applied to the actuating rod (4). An intermediate member (10) located between the cup (8) and plunger (5) slides with respect to the piston (3) and plunger (5).

Abstract: A valve (60) for use in a brake system (10) through which a source (32) of fluid charges an accumulator (24) to a desired fluid pressure level and through which fluid pressure present in a conduit (52) is communicated to a reservoir (33) in the absence of the flow of fluid from the source. The valve (60) has a housing (62) with a bore (64) therein with an entrance port (66) connected to the source of fluid (32), an exit port (68) connected by a flexible conduit (52) to the accumulator (24) and exhaust port (70) connected to the reservoir (33). A sleeve (72) which is located in bore (64) has an internal bore (74) with a first diameter (82) for retaining a first ball (90), a second diameter (80) for retaining a linkage member (94) and a third diameter (86) for retaining a second ball (92). A first spring (93) urges the first ball (90) toward a first seat (84′) formed between the first (82) and second (80) diameters.

Abstract: A fluid power apparatus having a housing with a bore therein which is divided by a power piston into an inlet chamber and an outlet chamber. The power piston has a passageway for connecting the inlet chamber with an outlet chamber. A valve arrangement controls the flow of a fluid under pressure from a source through the passageway. The valve arrangement including a valve seal, a valve spring and an input rod. The valve spring urges the valve seal into engagement with the input rod to define a working chamber within said passageway. The fluid under pressure flows from the inlet chamber to the outlet chamber by passing between the valve seal and a valve seat located in the working chamber. The flowing of fluid past the valve seat in a rest mode of operation develops a turbulence which creates a broad band non-resonance sound having an acceptable audible level of approximately 30 dB.

Abstract: A hydraulic capacity having a hollow body (2) made of a rubber material and a rigid body (3) which surrounds the hollow body (2) to limit the expansion of the hollow body (2). The hydraulic capacity containing at each instant an instantaneous volume (V) of fluid to which an instantaneous pressure is applied as a function of the instantaneous volume (V). The hollow body (2) has a wall (21) which is simultaneously in contact with the casing (3) and at least via of a first zone (Z1) and a second zone (Z2). The first zone (Z1) has a first thickness (E1) and the second zone (Z2) has a second thickness (E2) which are separated from each other by a third zone (Z3) having a third thickness (E3). The third zone (Z3) being separated from the casing (3) and the third thickness (E3) being different than the first (E1) and second (E2) thickness such that an instantaneous pressure (P) of the fluid is controlled according to a predefined relationship.

Abstract: A braking system for a pair of in-line roller skates having a housing with a plurality of rollers located one behind the other along a line of directional travel of the skate from a front end to a rear end. First and second rotors are secured to at least one of the plurality of the rollers. First and second pistons retained in the housing are located in a line perpendicular to the first and second rotors. An actuation piston is located in the housing and connected by first and second passageways to the first and second pistons. A boot which is secured to the housing has a pivotally attached collar located adjacent an opening for the foot of a skater. The collar engages an ankle of a skater for retention of the boot on a foot of the skater. A linkage extends from the collar to the actuation piston. When the skater is traveling in a forward direction, a center of gravity through which weight is transmitted from the boot into the housing is located toward the front end of the housing.

Abstract: A brake system (10) having a control member (12) through which a remotely located master cylinder (18) is selectively supplied with either a first operational fluid developed by a first pump (14), a second operational fluid developed by a second pump arrangement (500,600) or a third operational fluid from a storage system (302) as a function of a brake force applied to an input push rod (16) and a sensed flow of operational fluid through a shuttle valve (64) to the master cylinder for effecting a desired brake application. A electronic control unit (200) receives an input signal corresponding to the brake force and a sensed flow to activate the second pump arrangement (500,600). Whenever the fluid pressure of the first operational fluid is insufficient, the second pump is activated and the second operational fluid supplants the operation of the master cylinder (18) by the first operational fluid to effect the desired brake application.

Abstract: The invention relates to a pneumatic booster operated by a plunger (9) housed in a bore (61) and carrying a moving seat (102) intended to interact selectively with a shut-off member (111), this member being itself capable of interacting selectively with a fixed seat (101).According to the invention, the plunger (9) comprises a cylindrical body (91) and a collar (92) sliding between a front stop (911) and a rear stop (912) of the body, an anterior section (921) of the collar (92) being engaged between the cylindrical body (91) and the bore (61), a posterior section (922) of the collar (92) carrying the moving seat (102), and it being possible furthermore for the collar (92) to be held temporarily stationary in the bore independently of the movement of the body (91), by means of a channel (14) and of a snap ring (13), in order to allow extended operation of the booster after a sharp braking action.

Abstract: A disc brake for a motor vehicle including a disc (1), a carrier fixed to the vehicle and inboard (51) and outboard (52) pads. The respective ends (511,512,521,522) of the inboard (51) and outboard (52) pads slide in an upstream branch (21) and a downstream branch (22) of housings (211,221,212,222) of the carrier. Each of the upstream and downstream branches (21,22) of the carrier provides a stop (611,622) to one of the inboard and outboard pads (51,52) however, each of the pads (51,52) only comes into abutment against one of the upstream and downstream branches. The upstream and downstream branches (21,22) being connected to a base (23) different cross-sections and correspondingly different stiffness in a ratio of between 0.80 to 1.25 to resist forces applied to the stop (611,622) without appreciable degradation in the operational performance of the disc brake.

Abstract: A method of fastening a first member to a second member. The first member has a first opening with first left handed threads that extend from a first surface to a second surface. A stud having a shaft with a first section having right handed threads that extend from an end to a first groove, a second section with second left handed threads that extend from the first groove to a second groove adjacent a head and a radial surface that extends on an angle from the second groove toward a peripheral surface on the head is obtained from a supply source. The shaft is inserted into the first opening to engage the first and second left handed threads and an initial torque is applied to the head to bring the radial surface into engagement with the first left handed threads. Thereafter, additional torque is applied to the head to cause the radial surface to engage and deform a portion of the first left handed threads as the peripheral surface is moved into engagement with the second surface.