Mechanical disc brake having an automatic slack adjustor

Details Mechanical disc brake having an automatic slack adjustor Mechanical disc brake having an automatic slack adjustor

1975-09-02

1976-08-24

Kunin, Stephen G.

Brakes

Wheel

Axially movable brake element or housing therefor

188 728, 188196F, F16D 6556

Patent

active

039761681

ABSTRACT:
A mechanical disc brake comprising a caliper housing having a cylinder bore, with a piston slidably disposed therein which bears at one end against one of the friction pads. Mounted in the outer end of the cylinder bore is an end plate having a screw-threaded bore to receive a power screw. One end of the power screw extends outwardly beyond the end plate and has a lever fixed thereto, which is operated by an air cylinder or other power device. A radially extending head on the inner end of the power screw abuts against a thrust bearing on the end of an adjuster screw that is screw-threaded into the skirt of the piston. A spiral spring is attached at one end to the power screw and at the other end to the adjuster screw, and exerts torque on the adjuster screw tending to rotate the latter in the direction to advance the adjuster screw toward the power screw head whenever there is any axial clearance between the adjuster screw and the power screw. The piston is returned a predetermined small amount (0.010 to 0.040 inch) when the brake is released, by a spring-pressed friction ring surrounding the piston, through which the latter slides in small increments as the brake pads wear.

REFERENCES:
patent: 2949173 (1960-08-01), Peras
patent: 3186521 (1965-06-01), Chouings
patent: 3331472 (1967-07-01), Swift
patent: 3378109 (1968-04-01), Bauman
patent: 3590964 (1971-07-01), Krause
patent: 3592299 (1971-07-01), Erdmann
patent: 3767016 (1973-10-01), Hurt
patent: 3768602 (1973-10-01), Burnett
patent: 3812935 (1974-05-01), Pringle
patent: 3851737 (1974-12-01), Hewins

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