Abstract: A brake actuator assembly for a railway vehicle braking system includes a pair of end members spaced apart from each other along a longitudinal axis of the brake actuator assembly, a hollow flexible elastomeric member, two peripheral flanges extending outwardly from ends of the hollow flexible elastomeric member. Two retaining members, apertures and fasteners are employed for attaching each peripheral flange directly to a respectively positioned end member. The brake actuator assembly is connected to a source of fluid under pressure enabling inflation of the flexible elastomeric member and initiation of a braking sequence of the railway vehicle braking system. The brake actuator assembly of the instant invention allows for improved control of the brake shoe forces including visual travel measurement indication which is especially desirable during light load conditions.
Abstract: A brake structure for a main shaft of a direct drive torque motor comprises a body, a direct drive torque motor, a main shaft and a brake assembly. The main shaft is provided for fixing the torque motor and the body, and the brake assembly is mounted between the body and the main shaft. An annular brake oil room of the brake assembly is positioned against the main shaft, and the brake seat subassembly has a thinner brake deformation wall formed between the annular brake oil room and the main shaft. The annular brake oil room utilizes its high pressure caused deformation to the brake deformation wall, thus achieving a braking effect by pressing the main shaft. Thereby, the present invention is easy to assemble, and not only can stop the main shaft quickly, but also has a greater locking force.
Abstract: A brake actuator assembly for a railway vehicle braking system comprises a flexible elastomeric member directly and sealably attached to a mounting member employed for attaching the brake actuator assembly to the rigid structure of a braking system and to a push rod member connected to the control linkage. The brake actuator assembly is connected to a source of fluid under pressure enabling inflation of the flexible elastomeric member and initiation of a braking sequence of the railway vehicle braking system. The brake actuator assembly of the present invention allows for improved control of the brake shoe forces including visual travel measurement indication which is especially desirable during light load conditions. Currently used brake assemblies employing cylinder type actuators may be retrofitted with the brake actuator assembly of the invention.
Abstract: The present invention is a unique motor comprising a containment chamber having thick walls surrounding a thin wall, is created when a plug is fusible joined. An inlet port and preferably a purging port are located in the thick walls. A motion is created when said expansion wall expands as said containment chamber is pressurized.
Abstract: A brake assembly and method are provided wherein a shaft having a bore rotates about a rod such that a flexible ring member positioned within a groove of the rod expands into frictional contact with the shaft bore wall for restricting rotation of the shaft when pressure is increased in a chamber formed between the flexible ring member and a bottom portion of the groove. The brake assembly for use with a model vehicle incorporates an onboard air pressure tank which suppplies pressure to the chamber forcing the O-ring into frictional contact with a rotating hub for bringing the rotating hub to a stop. A pressure regulator valve having both high and low pressure sources provides multiple pressure levels to the chamber for imparting varying frictional forces to the rotating hub for taking the vehicle through a controlled slowing and stopping action.
Abstract: An internal shoe drum brake has a body (1) carrying a plurality of circumferentially spaced friction elements (2) movable into engagement with a rotatable drum (3) by a hydraulic system including an actuator (5) having a pressure-applying cylinder (2) in which a pressure-generating piston (21) is driven by an electrical stepper motor (28), slave cylinders (4) which actuate the friction elements, and internal ducts (7, 8) for transmitting pressure from piston (21) to slave cylinders (4).
Abstract: A brake arrangement is disclosed which includes a wheel support, a wheel borne by the wheel support, a brake drum, at least one brake guide saddle arranged in the brake drum so as to bear against the wheel support, a fluid drive piston arranged in a bore in the guide saddle, the guide saddle having guide lugs extending in a direction parallel to the direction of the bore, the guide lugs delimiting a channel in the peripheral direction, and a brake element placed in the channel so that it may be driven by the piston. In order to improve serviceability and to ensure a long useful life, the at least one brake guide saddle is separate from the wheel support. Retainer elements are provided, which are accessible from the inner side of the wheel, and are detachably connecting the guide saddle with the wheel support; and at their longitudinal sides, the guide lugs, each delimiting such guide channel are bridged over at their longitudinal sides by ribs delimiting the guide channel at the end.
Abstract: The invention concerns a radial coupling with shoes, of a simple structure, eliable in operation, and which is engaged and disengaged without delay. The coupling comprises a body in which are provided several chambers. The chambers are connected by means of pipes with a source of pressurized fluid. The body is fixed on the axis of a winch. Movable pistons are disposed in each chamber and are loaded with return springs. Supports are disposed on each piston and each support carries a frictional covering.
December 1, 1986
Date of Patent:
March 8, 1988
Technical Sciences Institute of the Serbian Academy of Sciences and Art
Abstract: A spot type brake having a disc or preferably ring brake member comprises a pair of brake pads on opposite sides of the brake member and a caliper with a hydraulic actuating unit for clamping the brake pads into engagement the brake member along a braking axis. The piston of the hydraulic actuating unit cooperates with a first brake pad and a bearing surface on the caliper cooperates with a second brake pad. The center or area of the bearing surface is circumferentially offset upstream or behind the braking axis relative to the direction of rotation of the brake member but the actuating unit is centered with respect to the first brake pad.
Abstract: A band brake assembly includes a band which carries a friction lining for engagement with a rotatable member. A casing surrounds the band and a hydraulic actuator cooperates with a pair of links which are engaged with respective ends of the band. When the hydraulic actuator is operated, the hydraulic actuator is moved toward the rotatable member such that the pair of links are pivoted oppositely about the moving hydraulic actuator. The pivoting links are coupled to the band such that movement of the hydraulic actuator causes the band to contract the friction lining into engagement with the rotatable member. The pair of links are optionally provided with rollers which roll on the casing and the hydraulic actuator when the latter is operated. It is also possible to eliminate the casing so that the rollers roll on the band when the hydraulic actuator is operated.
April 3, 1978
Date of Patent:
April 15, 1980
The Bendix Corporation
Donald D. Johannesen, Orla Lee Holcomb, Jr., Andrew F. Kazmierzak
Abstract: In a spreading disc brake relative angular movement of the pressure plates to initiate the application of the brake is effected by a fluid pressure actuator acting on a pull-rod through a pivotal thrust coupling so arranged as to confine rocking movement of the pull-rod to a single plane normal to the brake axis.