Abstract: A pneumatic brake booster having a valve (7) actuated by movement of an operating rod (8) within a hub (6) from a position of rest to an extreme actuation position. In the position of rest, the valve (7) is closed to a pressure source (A) and when moved toward the extreme actuation opened to the pressure source (A). A purification filter (9) located between the pressure source (A) and valve (7) is made of a compressible material which has a minimum volume with the valve in the rest position and a maximum volume when the operating rod (8) reaches the extreme actuation position.

Abstract: A pneumatic brake booster having a right casing (10) divided in a leaktight fashion by a first moving partition (12) into a front chamber (14) and a rear chamber (16). The front chamber (14) being permanently connected to a source of low pressure (V) with the rear chamber (16) being selectively connected to the front chamber (12) and as source of high pressure by a three-way valve (40) operated by an operating rod (34). A three-way and two position solenoid valve (68) has a first inlet connected to the source of low pressure (V), a second inlet connected to a source of high pressure (A) and outlet connected to the rear chamber (14). A second moving partition (54,54') divides the rear chamber (14) into a working chamber (16) and a control chamber (50,50') with the outlet of the solenoid valve (68) being connected to the control chamber (50,50').

Abstract: The invention relates to a pneumatic booster using, by way of reaction members, a number of balls (15) trapped between three bearing faces (12, 13, 14), the first bearing face (12) consisting of a projecting and at least partially conical surface of the booster plunger (9). According to the invention, the first bearing face (12) has at least two different slopes (P1, P2) to allow a decrease in the reaction force in the event of quick actuation of the booster.

Abstract: A cage for trapping an animal having a timing system for indicating the time that the animal was trapped in an enclosure. The cage is defined by a housing having an opening therein with a door which is opened to allow an animal to enter the housing. A closure arrangement responds to the animal passing through the opening for closing the door to trap the animal in the housing. A clock, having a second hand, minute hand, hour hand and an indicator hand that move with respect to a dial face, is secured to the housing. A lever responsive to the closure of the door activates a switch to stop the clock and provide an indication of the time that the door was closed by the location of the hour hand and indicator hand. If the indicator hand is located on the left hand side of the hour hand an animal was trapped within the first twelve hours after the trap was set and if the indicator hand is on the right hand side of the hour hand the animal was trapped more than twelve hours after the trap was set.

Abstract: A secondary source of braking for large hydraulically braked vehicles utilizing the available power source (38) provided by typically available anti-skid and traction control braking systems. The anti-skid braking system is used to control the secondary braking function in a manner optimal to the operating condition of the vehicle. Unique distinctive operating modes are used when the vehicle is either moving (79, 81, 83), or stationary (57, 59, 73). The advantages of the stationary mode are fast time response and high output pressure controlled with a minimum of pump operation and fluid movement. The advantages of the dynamic mode are the ability to modulate brake pressure in response to the driver's command.

Abstract: A pedal arrangement for a motor vehicle having a bulkhead (10) which forms a barrier between an engine compartment (C) and a passenger compartment (H) for a driver and passengers. The pedal arrangement includes a transverse brace (32) which is rigid in bending, a mount (12) for a pedal (14) which is secured to the bulkhead (10) on the passenger compartment (H) side of the bulkhead (10) and at least one rigid force-transmission element (30). The pedal (14) has a lever (16) with a first end articulated to the pedal mount (12) and a second end with an operating shoe (18) attached thereto. The force-transmission element (30) has a first end (28) articulated to the transverse brace (32) and a second end (34) which extends between the pedal mount (12 and lever (16).

Abstract: A braking device for a motor vehicle comprises a master cylinder (200) and a pneumatic booster (100). The pneumatic booster includes a rigid casing (10) divided by at least one moving partition (16) into at least two chambers (12, 14). A main hydraulic piston (30) of the master cylinder (200) includes a reaction piston (34) which slides in a hollow moving cylinder (32). The reaction piston includes a normally open two-way valve (94, 95) which can interrupt communication between an interior (V) of the master cylinder and the interior (35) of the moving cylinder (32); a first part (50) which abuts against the moving cylinder (32), in the rest position; and a second part (52) which abuts against the first part (50), in the rest position. A stepped third piston (82) slides inside a stepped bore (84, 85) of the moving cylinder (32) and abuts against the first part (50), in the rest position.

Abstract: A master cylinder with a main piston (12) located in a main bore (110) of a body (11). A reaction arrangement including a reaction piston (3) which slides in a secondary bore (120) in the main piston (12) for providing a reaction to a pneumatic booster. The reaction arrangement includes a shut-off seat (31) associated with the reaction piston (3), an annular wall (4) located in the secondary bore (120) at a distance from the reaction piston (3), a ratio change-piston (5) located in a leaktight sliding in a central passage of the annular wall (4) and a floating piston (6) mounted in a leaktight sliding within the ratio change piston (5) for providing the reaction piston (3) with a reaction force when an actuation force is applied to quickly to the reaction piston (3).

Abstract: A master cylinder having a main piston (12) located in a main bore (110) of a body (11) to define a working chamber (13), a reaction piston (3) located in a stepped bore (120) of the main piston (12) to define a reaction chamber (4) with components to providing a hydraulic reaction to a pneumatic booster. The main piston (12) slides in the main bore (110) in response to a boost force to develop an actuation force while the reaction piston (3) slides in the stepped bore (120) in response as a function of the actuation force. A first shut-off seat (41) is located on a front face of the reaction piston (3) is located in the reaction chamber (4) while a second shut-off seat (42) located in the reaction chamber (4) is mounted on a seat support (7) carried by the main piston (12). A first spring (51) urges the reaction piston (3) in a direction most likely to move the first shut-off seat (41) away from the second shut-off seat (42).

Abstract: A boosted braking system for a motor vehicle having a master cylinder (200) equipped with a main hydraulic piston (30) for causing an increase in pressure (P.sub.1) of brake fluid and a pneumatic booster (22) which is controlled by the application of an input force (F.sub.2) to a control rod (26). The control rod (26) being integral with a plunger (28) which controls the opening of a three-way valve (24). The booster (22) having a rigid casing (10) which is divided in a leaktight fashion into at least first (12) and second (14) chambers by at least one moving partition (16). The moving partition (16) being acted on by a difference in pressure between the first (12) and second (14) chamber on the opening of the three-way valve (24). The moving partition (16) driving a pneumatic piston (22) which carries the three-way valve (24) and contributing to at least in transmitting a boost force (F.sub.1) to the main hydraulic piston (30) of the master cylinder (200).

Abstract: A brake system has a brake booster secured to a dash panel which separates an engine compartment from a passenger compartment of a vehicle. A bracket off-sets the booster into the engine compartment from the dash panel. A cylindrical body has a flange on a first end located between the housing of the brake booster and the bracket. The cylindrical body has a partition wall located between the first end and a second end and a radial opening located between the partition wall and the second end. The partition wall has a central opening through which an input rod extends to provide a valve with an input force. An end boot, secured to the second end of the cylindrical body and the input rod, forms a resonant chamber within the cylindrical body. The radial opening provides unrestricted communication air from the engine compartment to the resonant chamber while the central opening forms an orifice to control the air flow from the resonant chamber into the valve body.

Abstract: A pneumatic brake booster for providing braking assistance. The brake booster has an envelope (10) with an axis of symmetry (X-X') separated sealingly by at least one movable partition (12) to define at least a first chamber (14) connected permanently to a source of low pressure and at least a second chamber (16). The second chamber (16) being selectively connected to the first chamber (14) or a source of high pressure through a three way valve structure actuated by a control rod (30). The control rod (30) being capable of bearing, through the intermediary of a front face of a plunger (28) and a reaction disc (50) with a rear face of a thrust rod (48). The plunger (28) sliding in a bore (26) in the movable partition (12).

Abstract: A brake-control device having a vacuum booster (1), a master cylinder (2) and an electro-hydraulic module (3) for controlling brake pressure. The booster (1) has a front shell (10) and a rear shell (11) having a cylindro-frustroconcal shape with first (R10) and second (R11) outsider radii. The master cylinder (2) and module (3) being secured to the front shell (10) at least three fixing points (71, 72, 73). The fixing points defining a peripheral ring (100) on the front shell which is delimited by an inside radius (Ri) that is equal to half of the outside radius (R10) of the front shell (10).