Abstract: A combined service brake and spring brake cylinder for vehicle brake systems, includes a service brake piston and a spring brake piston. A sealing assembly is located in a central bore of a partition and seals off the interior of the service brake cylinder from the interior of the spring brake cylinder. The radial outer peripheral surface of the spring brake piston has an additional sealing assembly for sealing off a spring chamber. At least one of the sealing assemblies contains a guide ring that guides the spring brake piston rod in the bore of the partition, or the spring brake piston in the spring brake cylinder. The guide ring consists of a more rigid material than that of at least one sealing element. The sealing element consists of an elastomer that is connected to the guide ring by original forming methods such as injection molding or transfer molding.

Abstract: A braking device includes a base, a braking component, and a driving component including a reset member. The braking component has a clamping block. The driving component includes a movable member, a chamber therein and a first butting portion. The movable member passes through the driving member. One end of the movable member has a piston accommodated in the chamber, and the other end of the movable member has a second butting portion. The reset member is disposed in the chamber. The piston butts the reset member under an external force, and the first butting portion and the second butting portion are kept away from each other, and when the external force vanishes, the reset member butts the piston, and the first butting portion and the second butting portion are kept close to each other so as to achieve a braking effect.

Abstract: A revolving apparatus for a work vehicle includes a drive unit, a brake unit under the drive unit, a deceleration unit under the brake unit, and an output unit under the deceleration unit. The brake unit has a brake main body that stops revolution, a housing, a piston and a spring. The housing has a first face with a first concave component. The piston has a second face opposite the first face with a second concave component. The piston is disposed between the brake main body and the housing, and is movable with respect to the housing in order to actuate the brake main body. The spring member has two ends held in the first and second concave components. The first and second concave components have cylindrical shapes. The inside diameter of the first concave component is greater than the inside diameter of the second concave component.

Abstract: Cut-in-cut-out valves for hydraulic circuits. The hydraulic circuits include a hydraulic pump outputting a variable pressure controlled by a slaving line, an accumulation circuit, a return line to the reservoir, a cut in-cut-out valve. The hydraulic circuits also include a cut-in-cut-out valve having four orifices, a first orifice connected to the supply line, a second orifice connected to the slaving line, a third orifice connected to the return line leading to the reservoir, and a fourth orifice connected to the accumulation circuit. The cut-in-cut-out valve alternates between two positions as a function of the pressure in the accumulation circuit, a cut-in position in which the first, second and fourth orifices are connected to each other, and a cut-out position in which the first and fourth orifices are closed.

Abstract: An apparatus and method for improving the application of air brakes in the event a driver fails to apply the brakes upon exiting the driver area. The vehicles brakes will be applied automatically in the event the driver forgets. This will be done by blocking the air flow and exhausting the air that is present in the lines. The air will not be restored to said vehicle until the driver is back in control of this vehicle and manually resets the brake valve.

Abstract: A brake cylinder for a pneumatic vehicle brake, particularly for a commercial vehicle includes a spring-loaded brake section for performing parking brake operations by a spring-loaded spring, and a service brake section for performing compressed air-actuated service brake operations. The spring-loaded brake section and the service brake section are combined in a structural unit in a housing. The housing is divided by a piston into a pressure chamber to which compressed air can be applied and a further space. The pressure chamber serves the actuation of the service brake section in the pressure space and the spring-loaded spring of the spring-loaded section being disposed in the additional space on the opposite side of the piston. The spring-loaded spring acts on an additional spring-loaded piston in the space. The piston is lockable in relation to the piston by a pneumatically operable locking mechanism and releasable from the same by releasing the locking mechanism.

Abstract: A spring-type brake actuator for a pneumatically-operated vehicle brake is provided, in which the portion of the brake actuator containing the parking brake actuation power spring is arranged to be vented to atmosphere but not to permit entry of outside environmental air into the power spring chamber, the spring-type brake actuator being provided with an internal breather valve which permits clean dry air from the parking brake release chamber to enter the power spring chamber which the pressure difference between the chambers falls to within a predetermined pressure range.

Abstract: A braking device including a housing mounted in relative rotation relative to a shaft, braking discs, a braking piston adapted to stress the braking discs, a spring washer mounted on the brake housing on a support zone located on one of the peripheries of its first face, and having on its second face a braking support zone, which cooperate with the braking piston so as to stress the braking discs according to a braking direction. An unbraking piston is adapted to stress the washer according to a direction opposite said braking direction. The spring washer has an unbraking support zone with the unbraking piston on the other of the peripheries of the second face of the spring washer. The braking support zone is located at an intermediate position of the at least one spring washer.

Abstract: A wheel loader (1) has a tire (5). The wheel loader (1) includes a hydraulic pump (11), a hydraulic oil tank (7) disposed at a position higher than the hydraulic pump (11) and connected to the hydraulic pump (11), a check valve (12) disposed at a position lower than the hydraulic oil tank (7) and connected to the hydraulic oil tank (7), a filter (13) disposed at a position lower than an upper surface (US) of the tire (5) in a side view and connected to the check valve (12), and a pipe (14) extending to a first position (H1) lower than the check valve (12) and further extending from the first position (H1) to a second position (H2) as a higher position than the check value (12) is set as the second position (H2), and connected to the filter (13) at the second position (H2). Accordingly, it is possible to provide a work vehicle capable of inhibiting a hydraulic oil from spilling out in exchanging the filter (13).

Abstract: An apparatus is provided for a vehicle having components of a parking brake system and components of a service brake system. The apparatus comprises a normally-energized solenoid operatively coupled to components of the parking brake system and for, when de-energized, exhausting air pressure in at least some components of the parking brake system to set park brakes. The apparatus further comprises an electronic controller arranged to (i) monitor a combination of one or more signals indicative of a service brakes holding function, (ii) monitor a combination of one or more signals indicative of a fault condition, and (iii) provide one or more signals to de-energize the normally-energized solenoid to exhaust air pressure in at least some components of the parking brake system and thereby to set park brakes when both signals indicative of a service brakes holding function and signals indicative of a fault condition of the vehicle are detected.

Abstract: A braking system for a final drive for a wheel assembly of an independently powered wheeled vehicle. The system includes a service brake having a displaceable element actuatable to retard rotation of the individual wheel assembly. A park brake is positioned closely adjacent to the service brake and is actuatable independently of the service brake to displace the displaceable element to retard rotation of the wheel. Both the service brake and park brake are accessible without disturbing an electric motor with which they are associated.

Abstract: A construction machine includes a negative parking brake whose braking state is released by a supply of hydraulic fluid. It also includes a parking brake hydraulic circuit that is branched from a hydraulic fluid supplying circuit, which supplies the hydraulic fluid to a transmission of the construction machine, and supplies the hydraulic fluid to the parking brake. The parking brake hydraulic circuit includes a check valve that prevents backflow of the hydraulic fluid of the parking brake to the hydraulic fluid supplying circuit, and it includes an operation switching valve, which is provided closer to the parking brake than the check valve, for switching between an activation and a release of the parking brake. The parking brake hydraulic circuit also includes a relief valve, which is interposed between the check valve and the operation switching valve and which discharges the hydraulic fluid of the parking brake when the relief valve is opened.

Abstract: A vehicle braking apparatus that can exert high braking performance during vehicle braking is implemented by a control mode that can be realized in a braking apparatus (10) of usual hardware. In controlling the braking apparatus (10) of a vehicle, a climb rate of a wheel cylinder braking oil pressure (Pw) is decreased smaller than a climb rate corresponding to a climb rate of a master cylinder oil pressure (Pm) from a time point at which the wheel cylinder braking oil pressure (Pw) reaches a predetermined threshold value. The time point at which the wheel cylinder braking oil pressure (Pw) reaches the predetermined threshold value (P3) is estimated based on the climb process of the master cylinder oil pressure (Pm) or directly detected.

Abstract: A braking mechanism is provided for a hydraulic motor driven wheel utilizing a two-piece design of a hub that rotates by means of a drive shaft. A hydraulic chamber is created on the hub in which a piston resides. The piston is grounded (i.e., non-rotatable relative to the motor housing) in the sealed chamber. The piston face inside of the chamber has a radial set of face teeth. These face teeth are similar to the face teeth inside of the hydraulic chamber. When the chamber is pressurized, the piston face teeth are pushed away from the hub face teeth allowing the hub to freely rotate. When pressure is released from the chamber, a spring, or a number of springs, push the piston into the hub causing it to stop rotating relative to the piston.

Abstract: A method and system for measuring pressure in a pressure regulation unit of a motor vehicle braking system, without using pressure sensors and having a motor pump unit with an electric motor and a hydraulic pump. The steps include producing a relative motor characteristic diagram for a series of the units. The diagram includes the data of motor-rotational-speed-dependent parameters, intensity of the motor actuation, and parameters relating to the level of the motor load. Further steps include; determining individual motor characteristic variables, determining a current rotational-speed-dependent parameter of an individual motor during the operation of the pump, and calculating a pressure which is characteristic of the braking system, by means of the diagram parameter of the individual motor and the value of the current motor actuation which determines the intensity of the motor actuation, wherein the individual motor characteristic variables are taken into account.

Abstract: A vehicle final drive includes a fixed spindle about which a wheel hub is mounted for rotation by wheel bearings, and within which a park and service brake assembly is mounted including a stack of Belleville springs carried by an input quill mounted within an inner end region, and a disc brake pack mounted within an outer end region. Located in the hub outboard of the spindle is a two-stage planetary reduction transmission. A reaction plate is fixed to an outer end face of the spindle cylindrical portion and holds the disc brake pack and a hub of a double ring gear of the transmission in place and preloads the wheel bearings. A fluid distribution manifold is defined by a passage in the spindle for distributing flow for cooling and/or lubricating an input thrust bearing, input drive shaft coupling splines, the brake disc pack, the wheel bearings, and the first stage planet gear bearings.

Abstract: A gearbox comprises a multi-function quill. The quill is provided for loading a bearing and limiting brake-releasing movement of a piston of a brake release.

Abstract: A rotary fluid pressure device includes a gerotor gear set having a ring gear and a star gear orbitally moveable about a longitudinal axis relative to the ring gear. The star gear includes an annular spacer ring disposed at one end of the star gear. A brake pin is moveable along the longitudinal axis into and out of interlocking engagement with the annular spacer ring. The brake pin includes an outer surface for engaging an interior surface of the spacer ring. The outer surface of the brake pin and the interior surface of the spacer ring are each angled relative to the longitudinal axis to engage each other in a tapered engagement, to generate an axial force along the longitudinal axis to move the brake pin out of engagement with the star gear in response to a torque being applied to the star gear.

Abstract: An electro-hydraulic brake system for a vehicle can include at least one hydraulic piston that exerts a force on a brake pad in a direction away from a brake disk and opposite to a force exerted, e.g., by a spring, on the brake pad in a direction toward the disk. A hydraulic pressure actuator can in one embodiment actuate the hydraulic piston to hold the brake in a disengaged position. A controller can in one embodiment actuate the hydraulic pressure actuator to advance the brake pad into engagement with the disk to exert a braking force based on a brake command signal, and can in one embodiment actuate the hydraulic pressure actuator to retract the brake pad from engagement with the disk upon receipt of a brake release signal. In one embodiment, the brake pad can move into engagement with the brake disk when an emergency (e.g., a loss of power or hydraulic pressure) occurs.

Abstract: A brake cylinder for pneumatic vehicle brakes includes a spring brake section for parking brake actions and a service brake section for service brake actions combined in one housing. The housing is subdivided by a piston into two compartments, one compartment being used as the pressure compartment for the service brake, and the brake spring of the spring section being arranged in the other compartment on the opposite end of the piston. The brake spring acts upon an additional spring piston, which can be locked and released relative to the piston by a pneumatic locking mechanism. The spring piston is connected to a piston rod directly or via additional elements to actuate the brake. Once the locking mechanism is released, the brake spring displaces the pistons relative each other during a parking brake action. At least one pneumatic valve for controlling the brake cylinder are integrated into the brake cylinder.

Abstract: A braking device includes a base, a braking component, and a driving component including a reset member. The braking component has a clamping block. The driving component includes a movable member, a chamber therein and a first butting portion. The movable member passes through the driving member. One end of the movable member has a piston accommodated in the chamber, and the other end of the movable member has a second butting portion. The reset member is disposed in the chamber. The piston butts the reset member under an external force, and the first butting portion and the second butting portion are kept away from each other, and when the external force vanishes, the reset member butts the piston, and the first butting portion and the second butting portion are kept close to each other so as to achieve a braking effect.

Abstract: An apparatus and method for preventing parking brake-caused disabling of a vehicle is provided. In at least one of the vehicle's parking brake release actuators' supply lines there is provided a flow arrangement which allows parking brake release fluid to flow to and from the release actuator when its supply line is undamaged, and restricts flow from the release pressure source when the line between the flow arrangement and the actuator is damaged. The flow arrangement may be a pilot-operated, non-graduated control valve, a combination of a pressure protection valve and a check valve arranged in parallel, a velocity-sensing check valve, or any other device or combination of devices which provide the damaged line shutoff or metering functionality. Such an arrangement prevents automatic application of the parking brake by releasing pressure from all of the vehicle's parking brake actuators, thereby precluding automatic vehicle immobilization following damage at one wheel end.

Abstract: In a brake actuator including a plurality of actuator housing portions, a diaphragm seal, partially delimiting a parking brake de-actuation chamber, is retained between adjacent actuator housing portions, and an elastic element disposed between the diaphragm seal and one of the housing portions opposes expansion of the parking brake de-actuation chamber. A push rod extends into and out of a service brake actuation chamber upon respective release of fluid pressure from the parking brake de-actuation chamber and supply of fluid pressure to the parking brake de-actuation chamber. In order to constrain a central portion of the diaphragm seal for movement together with both the push rod and a piston, a clamping arrangement is used to axially clamp the central diaphragm seal portion between an end of the push rod and a surface of the piston.

Abstract: A spring-type brake actuator for a pneumatically-operated vehicle brake is provided, in which the portion of the brake actuator containing the parking brake actuation power spring is arranged to be vented to atmosphere but not to permit entry of outside environmental air into the power spring chamber, the spring-type brake actuator being provided with an internal breather valve which permits clean dry air from the parking brake release chamber to enter the power spring chamber which the pressure difference between the chambers falls to within a predetermined pressure range.

Abstract: A spring-type brake actuator for a pneumatically-operated vehicle brake is provided, in which the parking brake release piston is formed from at least one stamped actuator piston plate, preferably a stamped aluminum plate. Preferably the biasing force of the power spring of the spring brake actuator bears on a stamped spring seat cap element which is interposed between the power spring and the stamped actuator piston plate. In addition, the parking brake release piston flexible diaphragm may be captured between the stamped actuator piston plate and a stamped backing plate by affixing the backing plate to a joining member, where the joining member includes a threaded insert to receive a manually-actuated parking brake release actuation tool.

Abstract: A brake cylinder for pneumatically actuated vehicle brakes, especially for commercial vehicles, includes a housing. The housing is divided into two chambers by a piston, one of the chambers being used as a pressure chamber for actuating an operating brake section, and a cylinder spring of a spring-loaded brake section being arranged in the other chamber on the opposite side of the piston. The cylinder spring acts on another spring-loaded piston in the chamber, which can be blocked in relation to the first piston by a pneumatically actuated locking mechanism. The other spring-loaded piston is released from the first piston by a releasing action of the blocking mechanism, and is connected to a piston rod for actuating the vehicle brake. Following release of the blocking mechanism, the cylinder spring acts between the two pistons and moves them in relation to each other during a parking braking operation.

Abstract: A locking apparatus for a parking brake includes a parking lever, a parking lever spring applying a restoring force to the parking lever, a cylinder of which an oil hole is formed thereto, a piston comprising a piston rod connected to the parking lever and a piston main body disposed within the cylinder, and the piston movable along length direction of the cylinder according to supplying or releasing of oil through the oil hole, a solenoid valve and a locking unit disposed within the cylinder for unlocking the piston when the solenoid valve is supplied electric power and for locking the piston when the solenoid valve is not supplied electric power.

Abstract: An electrically actuatable parking brake system for a pneumatic braking system includes a control valve device that has a control piston. The parking brake system can assume at least two operating states, namely a parked state or a driving state. The operating states can be assumed in a selective manner dependent on a position of the control piston, and the parked state is provided when the control piston is forced into an end position by the force of a spring that lies in a spring chamber. Leaked air that exits a ventilating connection of the control valve device can be returned into the spring chamber.

Abstract: A brake cylinder is provided for vehicle brakes, in particular for commercial vehicles brakes, that is equipped with a brake cylinder housing, in which a spring-loaded piston, a service brake piston, a spring-loaded spring and a piston return spring are arranged. The brake cylinder is simple to construct and extremely compact. The spring-loaded piston is in a primary chamber of the brake cylinder and is arranged between the service brake piston and a front side of the brake cylinder housing having the compressed air connections.

Abstract: A construction machine includes a negative parking brake whose braking state is released by a supply of hydraulic fluid. It also includes a parking brake hydraulic circuit that is branched from a hydraulic fluid supplying circuit, which supplies the hydraulic fluid to a transmission of the construction machine, and supplies the hydraulic fluid to the parking brake. The parking brake hydraulic circuit includes a check valve that prevents backflow of the hydraulic fluid of the parking brake to the hydraulic fluid supplying circuit, and it includes an operation switching valve, which is provided closer to the parking brake than the check valve, for switching between an activation and a release of the parking brake. The parking brake hydraulic circuit also includes a relief valve, which is interposed between the check valve and the operation switching valve and which discharges the hydraulic fluid of the parking brake when the relief valve is opened.

Abstract: A push/pull valve controller, including a switch and a fluid actuator, and system for use in combination with a push/pull valve to set and release a parking (or emergency) brake in a vehicle having an air brake system. The push/pull valve controller and system may further include additional safety features, such as a key lock.

Abstract: A structure for a spring chamber is formed by connecting a chamber case and a return spring housing case and includes a piston member and a push rod. The piston member has a spring receiving section which holds a power spring inside the chamber case and a cylinder body section which is interlocked with the spring receiving section. A diaphragm is arranged inside a return spring housing case chamber in the return spring housing case, defines a pressure medium chamber, and is deformed by an advancing and retracting operation of the cylinder body section. The push rod member advance and retract with an operation of the diaphragm, and performs braking or releasing of a brake. The push rod member is formed with integral molding of a push plate and a axle body section with aluminum material.

Abstract: A system and method of remotely controlling the parking brake of a disabled vehicle to be towed by a towing vehicle includes using the hydraulic fluid of towing vehicle to control the parking brake operation of the disabled vehicle. The towing vehicle is equipped with a control valve and brake release manifold assembly. The brake release manifold assembly provides a source of hydraulic fluid of controlled pressure. The towing vehicle has means to connect the controlled pressure hydraulic fluid of the towing vehicle to the parking brake system. The towing vehicle also has means to control and monitor the flow of hydraulic fluid to the disabled vehicle in order to either release or apply the brakes when desired.

Abstract: A railway brake cylinder includes a body (11?); a piston (13?) mobile relative to the body (11?) to act on a brake linkage and delimiting with the body (11?) a pressure chamber (10?) adapted to be supplied by a pneumatic pressure agent source; an auxiliary actuating member (26?) mobile relative to the body (11?) and the piston (13?), mechanically connected to manual operating elements to cause it to occupy either a rest position in which it is away from the piston (13?) or a pushing position in which it is in contact with the piston (13?); two orifices (73?, 51?) in fluid communication with the chamber (10?) and the atmosphere, respectively; and selective connecting elements (28?) between the two orifices (73?, 51?), the elements (28?) being mechanically connected to the auxiliary actuating member.

Abstract: The present invention relates to a hydraulic braking valve (22) comprising: an inlet orifice intended to be connected to a pressure supply means (23), an outlet orifice intended to be connected to a braking means (25), a leak orifice intended to be connected to a tank (24), a power distributor (26) adapted so as to connect the inlet orifice to the outlet orifice in a braking configuration, and a leak orifice to the outlet orifice in a rest configuration, said braking valve (22) being characterized in that the power distributor (26) is driven by two independently driven calibration means.

Abstract: A parking brake assembly for a railway car includes a ratchet mounted for rotation on a threaded piston rod of a brake actuator and a holding pawl engageable with the ratchet for maintaining a push rod of the parking brake assembly to apply braking force when the air pressure is lost in the brake pipe and releasing the push rod to accordingly release the braking force when the supply of air pressure in the brake pipe is restored. An operating lever and a cylinder connected thereto are provided for selectively rotating the holding pawl. Valve is provided for supplying air pressure to and evacuating it from the cylinder. Release mechanism is provided for manually releasing the braking force. The parking brake assembly is employed with either truck-mounted or carbody-mounted braking system.

Abstract: A motor, comprising: an internal motor chamber, and a rotor rotatable therein. The rotor is drivable by having a pressure medium applied to it and a braking element for braking the rotor. The braking element is axially arranged directly adjacent to the rotor, wherein the braking element and the rotor are axially moveable with respect to each other and form a spring-loaded friction pair, at least between a front end face of the rotor and the braking element.

Abstract: A combined motion control and brake apparatus and method includes a linear longitudinal rail, a bearing block supported on the linear longitudinal rail, a linear rail brake fixed to the linear longitudinal rail, a carrier connected to the rail brake and supported by the bearing block, a pair of linear cross slide rails fixed on the carrier, the cross slide rails disposed generally at right angles to the longitudinal rail, a cross slide bearing block mounted on each cross slide rail, a cross slide supported on the cross slide bearing block moveable in both longitudinal and lateral directions, relative to the longitudinal rails, the cross slide including an engagement feature, and an engager operable to engage the engagement feature to release the rail brake and to move the cross slide rail.

Abstract: A combined service brake and the stored-energy brake cylinder is provided, in which a ventilation valve which forms or shuts off a flow connection between the spring chamber and the service brake chamber of the brake cylinder ensures that disruptive noise is avoided while also preventing loss of air volume for building up the service brake force.

Abstract: A pneumatic brake system that includes at least one pneumatic latching valve; a single device, such as a solenoid, for providing momentary pilot signals to pneumatic latching valve; a source of pressurized supply air in communication with the pneumatic latching valve; a spring brake or other pneumatic device in communication with the pneumatic latching valve; and, optionally, an indicator device for monitoring and displaying the state of the pneumatic latching valve. Upon receiving a first momentary pilot signal the pneumatic latching valve changes from closed to open and delivers pressurized air to the spring brake. Upon receiving a second momentary pilot signal, the pneumatic latching valve changes from open to closed and exhausts pressurized air from the spring brake to the external environment. The valve remains “latched” in its current state until the signaling device is energized and the next momentary pilot signal is received.

Abstract: A hydraulic device includes a gerotor assembly, a wobble stick, an output shaft, a housing assembly, first and second ports, first and second brake disks, a piston, and a biasing member. The gerotor assembly includes a rotor and a stator. The housing assembly receives the gerotor assembly, the wobble stick and the output shaft. The first and second ports are in communication with the gerotor assembly. The piston is disposed in the housing assembly adjacent at least one of the brake disks. The piston cooperates with the housing assembly to define a brake pressure chamber. The housing assembly and the first and second ports are configured such that pressurization of either port results in pressurization of the brake pressure chamber. The biasing member is disposed in the housing and contacts the piston. The biasing member urges the piston toward at least one of the brake disks.

Abstract: A brake cylinder for pneumatic vehicle brakes, especially for utility vehicles includes a spring brake section for carrying out parking brake actions by way of a brake spring, and a service brake section for carrying out pneumatic service brake actions. The spring brake section and the service brake section are combined in one housing as a structural unit. The housing is subdivided by a piston into two compartments, one compartment of the two being used as the pressure compartment for actuating the service brake section, and the brake spring of the spring section being arranged in the other compartment on the opposite end of the piston. The brake spring acts upon an additional spring piston in the compartment, which can be locked relative to the piston by a pneumatic locking mechanism and can be released therefrom by releasing the locking mechanism. The spring piston is connected to a piston rod directly or via additional elements to actuate the vehicle brake.

Abstract: A rotary fluid pressure device (11) includes an end cap (23) which is disposed rearwardly of, and adjacent, the fluid displacement mechanism (21). The end cap defines a piston cavity (103) in which is disposed a lock piston (105), which is moveable between a first position and a second position, in which the forward portion (107) of the lock piston extends within a central opening (121) of a rotor member (49) to prevent movement. A release piston (137) is disposed in a central opening (125) of one of the housing member (13) and stationary valve member (63). A brake pin (141) is disposed in a bore (139) of a drive shaft (57), with a first axial end of the brake pin being operably associated with release piston and a second axial end being operably associated with the lock piston.

Abstract: In a brake- and/or clamping arrangement for a shaft supported in a device housing and comprising a braking disc mounted on the shaft rigidly for rotation therewith and a clamping ring supported in the device housing, the braking disc has a friction area comprising two truncated cone-shaped friction surfaces with at least one brake cone arranged in the device housing and one arranged on an activating member. One brake cone abuts during braking or clamping the brake disc whereas the other brake cone abuts a clamping ring, which is disposed between contact areas of the brake cones, the clamping ring in contact with the brake disc and a brake cone being mounted to the apparatus housing.

Abstract: A pneumatic brake system that includes at least one pneumatic latching valve; a single device, such as a solenoid, for providing momentary pilot signals to pneumatic latching valve; a source of pressurized supply air in communication with the pneumatic latching valve; a spring brake or other pneumatic device in communication with the pneumatic latching valve; and, optionally, an indicator device for monitoring and displaying the state of the pneumatic latching valve. Upon receiving a first momentary pilot signal the pneumatic latching valve changes from closed to open and delivers pressurized air to the spring brake. Upon receiving a second momentary pilot signal, the pneumatic latching valve changes from open to closed and exhausts pressurized air from the spring brake to the external environment. The valve remains “latched” in its current state until the signaling device is energized and the next momentary pilot signal is received.

Abstract: A caliper brake system includes a housing, a bore within the housing, and a piston slidably positioned within the bore. The brake system also includes a spring assembly, a fluid chamber defined by the bore and the piston, and a hydraulic fluid supply network. The spring assembly provides a biasing force to maintain the piston in an actuated position engaging a stator which engages the rotor of a vehicle. The hydraulic fluid supply network provides pressurized fluid to the fluid chamber to selectively overcome the biasing force of the spring assembly and move the piston to an unactuated position to release the rotor. Thus, the caliper brake is spring actuated and hydraulically released.

Abstract: A parking brake mechanism for an air actuated disc brake includes an air chamber separated into a non-pressurised section and a pressurised section. A resilient device is located in the non-pressurized section and is movable along an axis to adopt a retracted parking brake-off position and a deployed parking brake-on position. The resilient device is biased into the deployed parking brake-on position. A latching device is arranged to selectively retain the resilient device in the retracted parking brake-off position. An actuator is arranged to selectively disengage the latching device to permit the parking brake mechanism to be applied. The mechanism is configured to introduce pressurized air into the pressurized section to return the resilient device to the retracted parking brake-off position.

Abstract: An electro-hydraulic brake actuator for a vehicle can include an electric motor configured to operate at about 28 Vdc, and to operate at about 2 Amps or less to hold a vehicle brake in a disengaged position. A hydraulic master piston can be operatively coupled to the electric motor, the hydraulic master piston configured to slidingly move within a master cylinder fillable with a hydraulic fluid such that advancement of the master piston within the master cylinder varies the hydraulic pressure supplied to the vehicle brake. The electric motor and hydraulic master cylinder are configured to fit within a wheel hub corresponding to the vehicle brake, the motor configured to operate the hydraulic master piston to vary the hydraulic pressure applied to the brake.

Abstract: A braking mechanism is provided for a hydraulic motor driven wheel utilizing a two-piece design of a hub that rotates by means of a drive shaft. A hydraulic chamber is created on the hub in which a piston resides. The piston is grounded (i.e., non-rotatable relative to the motor housing) in the sealed chamber. The piston face inside of the chamber has a radial set of face teeth. These face teeth are similar to the face teeth inside of the hydraulic chamber. When the chamber is pressurized, the piston face teeth are pushed away from the hub face teeth allowing the hub to freely rotate. When pressure is released from the chamber, a spring, or a number of springs, push the piston into the hub causing it to stop rotating relative to the piston.

Abstract: A bistable valve for use in a parking brake system has a self-retaining device. The self-retaining device includes a movable sliding element, a stationary latch, and a deep latching element pivotable relative to the sliding element and the latch. A method is provided for actuating the parking brake system having the bistable valve including the self-retaining device.