US PATENT SUBCLASS 188 / 72.1
.~.~ With means for actuating brake element

Current as of: June, 1999
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188 /   HD   BRAKES

*  DD  WHEEL {10}
71.1  DF  .~ Axially movable brake element or housing therefor {8}
72.1.~.~ With means for actuating brake element {5}
72.2  DF  .~.~.~> Self-force-increasing means
72.3  DF  .~.~.~> And means for retracting brake element
72.4  DF  .~.~.~> By fluid pressure piston {2}
72.7  DF  .~.~.~> By inclined surface (e.g., wedge, cam or screw) {1}
72.9  DF  .~.~.~> By pivoted lever

DEFINITION

Classification: 188/72.1

(under subclass 71.1) Apparatus provided with means to press said component toward said rotating member so that the friction surface contacts the radially-extending surface, the operation of said means being initiated by a user of the brake.

(1) Note. In the operation of a brake or both of the surfaces (i.e., that on the rotating disc and that on the nonrotating brake element) will wear by attrition of the surfaces, thus tending to increase the space that should normally exist between the surfaces during nonoperation of the brake. The actuator that moves the brake element toward the disc for braking usually has only a limited range of operation, thus it is necessary to adjust the brake element toward the disc to compensate for such wear. In most devices the actuator mechanism is separate from the adjustor mechanism, but in all instances the actuator applies the brake whereas the adjuster is operated during nonapplication and the difference is readily apparent.