A pneumatic diaphragm brake cylinder for motor vehicles includes a housing part on the pressure side and a housing part facing away from the pressure side, as well as a diaphragm arranged therebetween, which divides the interior of the diaphragm brake cylinder into two chambers sealed off from one another, of which a first chamber has a pressure chamber loaded by a pneumatic pressure and a second chamber has a piston chamber for a piston actuated by the diaphragm. A peripheral fastening edge of the diaphragm is clamped between the pressure-side housing part and the housing part facing away from the pressure. The pneumatic pressure loads a surface of the diaphragm which is effective with respect to a working movement of the diaphragm. A reduction ring is provided which extends axially from the diaphragm into the housing part facing away from the pressure and which radially reduces or radially limits the effective area of the diaphragm. At least the reduction ring and the diaphragm are designed as a one-piece component.

A pneumatic diaphragm brake cylinder for motor vehicles includes a housing part on the pressure side and a housing part facing away from the pressure side, as well as a diaphragm arranged therebetween, which divides the interior of the diaphragm brake cylinder into two chambers sealed off from one another, of which a first chamber has a pressure chamber loaded by a pneumatic pressure and a second chamber has a piston chamber for a piston actuated by the diaphragm. A peripheral fastening edge of the diaphragm is clamped between the pressure-side housing part and the housing part facing away from the pressure. The pneumatic pressure loads a surface of the diaphragm which is effective with respect to a working movement of the diaphragm. A reduction ring is provided which extends axially from the diaphragm into the housing part facing away from the pressure and which radially reduces or radially limits the effective area of the diaphragm. At least the reduction ring and the diaphragm are designed as a one-piece component.

A spring brake actuator (1) for a vehicle, in particular a parking or emergency brake actuator, for use in a commercial vehicle, includes a cylinder housing (2) having a cylinder housing base (5) and a spring seat (7) on the base, a spring brake piston (9) located in the cylinder housing (5) for applying a braking force, and a compression spring (11) arranged between the spring seat (7) and the spring brake piston (9). The cylinder housing (2) is divided into a spring chamber (12) and a pressure chamber (14), the compression spring (11) being arranged in the spring chamber (12) and the pressure chamber (14) being supplied with pressurized fluid. An elastically deformable diaphragm (16) is sealingly mounted to the cylinder housing (2), with an inner periphery (18) sealingly mounted to the spring brake piston (9) to fluid-tightly isolate the pressure chamber (14) from the spring chamber (12).

A dissymmetric braking system has at least one right wheel braking device, at least one left wheel braking device, at least one device to apply a braking action, at least one actuating device to transform the braking action into a first pressure, at least one right wheel connection, at least one left wheel connection, and at least one pressure reducing device having at least one transfer device receiving the first pressure. The transfer device transforms the first pressure into a reduced second pressure, whereby avoiding, during the braking action, a fluidic connection between a fluid having the first pressure and a fluid having the second pressure to determine, during the braking action, a relationship between the first pressure and the second pressure with linear trend without variation of linearity throughout the operating field of the pressure reducing device, so that the braking action of one of the right wheel braking device and left wheel braking device is lower than the other.

A dissymmetric braking system has at least one right wheel braking device, at least one left wheel braking device, at least one device to apply a braking action, at least one actuating device to transform the braking action into a first pressure, at least one right wheel connection, at least one left wheel connection, and at least one pressure reducing device having at least one transfer device receiving the first pressure. The transfer device transforms the first pressure into a reduced second pressure, whereby avoiding, during the braking action, a fluidic connection between a fluid having the first pressure and a fluid having the second pressure to determine, during the braking action, a relationship between the first pressure and the second pressure with linear trend without variation of linearity throughout the operating field of the pressure reducing device, so that the braking action of one of the right wheel braking device and left wheel braking device is lower than the other.

A towable crash-attenuating vehicle is shown having a frame; at least two axles coupled to the frame, each of the axles having wheels attached thereto; a ballast coupled to the frame; deflection shields coupled to the right and left sides of the frame, wherein the deflection shields cover the frame and a majority of the wheels on each side of the vehicle; a tow connection coupled to the front of the frame; an impact attenuator coupled to the rear of the frame; wherein the vehicle is provided with a brake system, and wherein the vehicle is provided with an mechanism for locking and unlocking the brake system.

A towable crash-attenuating vehicle is shown having a frame; at least two axles coupled to the frame, each of the axles having wheels attached thereto; a ballast coupled to the frame; deflection shields coupled to the right and left sides of the frame, wherein the deflection shields cover the frame and a majority of the wheels on each side of the vehicle; a tow connection coupled to the front of the frame; an impact attenuator coupled to the rear of the frame; wherein the vehicle is provided with a brake system, and wherein the vehicle is provided with an mechanism for locking and unlocking the brake system.

Disclosed is a brake actuator which is able to adjust the operational states of a brake connection to the lower end of a push rod disposed movable upward or downward while passing through the lower end of a service brake housing in such a way that a diaphragm moves upward or downward a pressure plate in response to the elastic force of a compressive spring in a spring chamber and the adjustment of an air pressure in a pressure chamber.

An axle assembly having an axle, a brake spider and a bearing collar. The axle may have first and second transition regions. The first transition region may extend between first and second cylindrical portions of the axle. The second transition region may extend between second and third cylindrical portions of the axle. The brake spider may be disposed on the second cylindrical portion. The bearing collar may be disposed on the second transition region.

A brake device may include: a master cylinder including a master piston moved in connection with a pedal, and a master cylinder body having the master piston movably inserted therein and containing fluid of which hydraulic pressure is varied when the master piston is moved; a pedal force generation part housed in the master cylinder body, and restricting a motion of the master piston while interfering with the master piston depending on the motion of the master piston; a braking actuator configured to generate hydraulic pressure; an actuator connection part connecting the braking actuator to a brake mounted on a wheel; and a master connection part connecting the master cylinder to the actuator connection part.