Brakes – Wheel – Transversely movable
Patent
1979-07-10
1981-02-17
Halvosa, George E. A.
Brakes
Wheel
Transversely movable
188195, 188341, 192 75, F16D 5124, F16D 6509
Patent
active
042509815
ABSTRACT:
A vehicle drum brake has a shoe mounted on a back plate, one end of the shoe engaging an actuator and the other end engaging an abutment. To avoid the use of a fluid pressure control valve to vary the braking effort of the brake in dependence upon vehicle loading, the abutment is in the form of a roller which engages an arcuate member on the shoe, the roller being movable laterally of the shoe to vary the braking effort for a given actuating force. The roller may be connected to a pivoted lever which is rotatably mounted in the back plate and which is connected to a sprung part of the vehicle by a linkage. Movement of the sprung part due to changes in vehicle loading rotates the lever and moves the roller.
REFERENCES:
patent: 1385482 (1921-07-01), Carter
patent: 2081521 (1937-05-01), White
patent: 3386538 (1968-06-01), Cairns et al.
Harvey Geoffrey
Margetts Hugh G.
Wilson Alexander J.
Halvosa George E. A.
Lucas Industries Limited
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