Disk brake assembly
OwnerYvon Rancourtinventor
Life of this patent
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Abstract
An annular disk brake assembly having a housing mounted to a vehicle and a rotor disk mounted to a wheel of the vehicle. Annular brake pads extend parallel to the rotor disk within the housing and are mounted thereto with at least one brake pad being movable axially by an oil applied bladder mounted to the housing to move the first brake pad axially against the rotor disk. The rotor disk is adapted to slide axially to engage the second brake pad when pressure is applied to the rotor disk by the first brake pad and the bladder.
Claims9
A disk brake assembly for a vehicle wheel wherein the wheel includes a hub journaled to an axle on the vehicle, the disk brake assembly comprising a housing mounted to the vehicle and at least an annular rotor disk within the housing and means mounting the rotor disk to the wheel comprising a hub adapter adapted to be mounted for rotation with the wheel, the hub adapter including a cylindrical outer surface, the at least one annular rotor disk including a central opening defined by an inner cylindrical surface, and means to allow the at least one annular rotor disk to slide axially on the hub adapter but to restrain the at least one annular rotor disk against rotary circumferential movement relative to the hub adapter, the at least one annular rotor disk having at least a first annular friction surface and the housing including a first annular brake shoe provided adjacent the first annular friction surface of the at least one annular rotor disk and the first annular brake shoe being movable axially towards and away from the first friction surface, means provided for restraining the first annular brake shoe from rotating with the at least one annular rotor disk, the housing further includes an extension depending from the concentric wall located on the opposite side of the at least one annular rotor disk from the first brake shoe, and a second brake shoe is provided on the extension facing a second friction surface on the at least one annular rotor disk, the housing including an annular wall parallel to the first brake shoe, and an annular fluid expandable bladder extending between the first annular brake shoe and the annular wall, whereby upon expansion of the bladder the first brake shoe moves axially to frictionally engage the first friction surface of the at least one annular rotor disk and to move the at least one annular rotor disk towards the second brake shoe;
- at least one movable energy storage member is located between the outer cylindrical surface of the hub adapter and the inner cylindrical surface of the at least one annular rotor disk and arranged such that when the at least one annular rotor disk is moved axially towards the second brake shoe under the axial force which is applied by the fluid within the expandable bladder, the movable energy storage member is deformed to store energy such that when the fluid is released from the expandable bladder, the stored energy in the movable energy storage member will be effective to disengage the second friction surface of the at least one annular rotor disk from the second brake shoe.
A disk brake assembly for a vehicle wheel wherein the wheel includes a hub journaled to an axle on the vehicle, the disk brake assembly comprising a housing mounted to the vehicle and at least an annular rotor disk within the housing and means mounting the disk to the wheel, the disk having at least a first radial planar annular friction surface and the housing including a first annular brake shoe provided adjacent the first friction surface of the disk and the brake shoe being movable axially towards and away from the first friction surface, means provided for restraining the first brake shoe from rotating with the disk, the housing including an annular first wall means adjacent to the first brake shoe, and an annular fluid expandable bladder extending between the first annular brake shoe and the wall means, whereby upon expansion of the bladder the first brake shoe moves axially to frictionally engage the first friction surface of the disk, characterized in that means are provided for disengaging the first brake shoe from the first friction surface of the rotor disk comprising at least one rolling seal provided between an axially generated surface of the brake shoe and an axially generated cylindrical surface of the first wall means which extends parallel to and adjacent the axially generated surface of the brake shoe such that the rolling seal can store energy when force is being applied on the first brake shoe to frictionally engage the first frictional surface of the rotor disk by means of the fluid expandable bladder and whereby the stored energy is sufficient to retract the first brake shoe from the first friction surface of the rotor disk when fluid is released from the expandable bladder.
Dependencies are inferred from the claim text.