Brakes – Wheel – Axially movable brake element or housing therefor
Patent
1990-03-01
1991-07-23
Butler, Douglas C.
Brakes
Wheel
Axially movable brake element or housing therefor
188 727, 188106F, F16D 5504
Patent
active
050335910
ABSTRACT:
A compound disc brake comprises a pair of pressure plates with a ball and ramp camming mechanism, one of the plates comprises a driven plate keyed to a rotating axle shaft to be braked, and the other plate comprises a servo plate carried from the driven plate by the camming mechanism. The servo plate has a torque-transmitting structure in the form of a separate annular disc keyed to the outer peripheral edge of the servo plate. The torque-transmitting structure transmits torque applied to that region by a primary braking apparatus to the central region of the servo plate. Retardation of the servo plate by the primary braking apparatus causes the pressure plates to separate axially and move into engagement with relatively stationary braking surfaces in the brake housing whereafter servo braking occurs. The brake includes a mechanically operable parking brake which acts on the torque-transmitting structure and comprises an annular ring concentric with the shaft and having camming elements to produce axial movement when it is moved angularly by an arm extending through a circumferential slot. The annular ring of the parking brake may comprise a hydraulic annular piston which is also used for normal service braking, or may be a separate ring.
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patent: 3734242 (1973-05-01), Klaue
patent: 3899051 (1975-08-01), Grosseau
patent: 4358002 (1982-11-01), Price et al.
patent: 4550810 (1985-11-01), Price et al.
patent: 4685541 (1987-08-01), Price et al.
patent: 4736820 (1988-04-01), Price et al.
patent: 4795003 (1989-01-01), Colgate
patent: 4800993 (1989-01-01), Weber
Butler Douglas C.
Lucas Industries Public Ltd. Co.
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