Brakes – Wheel – Axially movable brake element or housing therefor
Patent
1976-09-29
1978-10-24
Halvosa, George E. A.
Brakes
Wheel
Axially movable brake element or housing therefor
74110, 188 729, 192 7024, 192 93R, F16D 6516
Patent
active
041216970
ABSTRACT:
Caliper brake assembly using a cam structure to actuate brake shoes to permit selection of a wide range of braking forces and to increase design flexiblity. The assembly has a frame journalling a pair of opposed arms with opposed brake shoes hinged adjacent opposed inner ends of the arms to brake a disc sandwiched between the shoes. The cam structure includes a cam member having a cam surface which cooperates with a brake actuator so that the cam surface is displaced by the actuator. A pair of cam followers cooperate with the respective arms and the cam surface during brake actuation to rotate each arm about a respective hinge axis relative to the frame so as to force the shoes against the disc. In one embodiment the cam member is displaced parallel to the hinge axes and each cam follower includes a swivellably mounted roller to accommodate swinging of the arms. In an alternative embodiment, the cam has double-acting wedges in which the actuator effectively floats between the arms. A lever, or a spring within the actuator, permits the brake to be engaged without fluid pressure thus permitting the brake to be used as a static brake also.
REFERENCES:
patent: 343680 (1886-06-01), Tribe
patent: 1751646 (1930-03-01), Nieman
patent: 2162775 (1939-06-01), Dick
patent: 2791123 (1957-05-01), Thomsen
patent: 3628639 (1971-12-01), Daley, Jr.
patent: 3929209 (1975-12-01), Peckham, Jr.
patent: 3986584 (1976-10-01), Wright et al.
Fandrich Helmut Edward
Kobelt Jacob
Halvosa George E. A.
Kobelt Jacob
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