Automatic adjusting mechanism for a disc brake assembly having a

Details Automatic adjusting mechanism for a disc brake assembly having a Automatic adjusting mechanism for a disc brake assembly having a

1989-11-13

1991-08-13

Oberleitner, Robert J.

Brakes

Wheel

Axially movable brake element or housing therefor

188 729, 188106F, 188196D, F16D 5518

Patent

active

050388959

ABSTRACT:
A disc brake mechanism, including an integral mechanical parking brake assembly and having automatic wear adjustment features, is disclosed. The adjusting mechanism comprises an axial thrust screw having one end exposed to atmospheric pressure to create an axial hydraulic differential pressure acting thereacross. An adjusting nut is threadably received on the thrust screw and normally engages a hydraulic actuating piston such that the adjusting nut is free to rotate with respect to the thrust screw and piston. Hydraulic pressures acting upon the thrust screw create opposing forces, the resultant of which is applied to a resisting mechanical spring. So long as the hydraulic pressure is below a predetermined value, the resultant hydraulic force acting upon the thrust screw is insufficient to overcome the resisting spring force and the thrust screw remains stationary. As the hydraulic piston moves upon hydraulic actuation of the brake, the adjusting nut is biased to rotatingly advance relative to the thrust screw, thereby adjusting for friction pad wear. As hydraulic pressure increase above the predetermined value, the resultant hydraulic force acting upon the thrust screw is sufficient to overcome the resisting mechanical spring, and the thrust screw in combination with the adjusting nut translates toward the piston. This causes the adjusting nut to frictionally engage the piston preventing any further advance of the adjusting nut relative to the thrust screw, thereby ending the adjustment cycle.

REFERENCES:
patent: 3610373 (1971-10-01), Burnett
patent: 3688875 (1972-09-01), De Hoff et al.
patent: 3767016 (1973-10-01), Hurt
patent: 3833095 (1974-09-01), Engle
patent: 3835961 (1974-09-01), Troester et al.
patent: 3920103 (1975-11-01), Hariakawa
patent: 4454933 (1984-06-01), Hunnicutt et al.
patent: 4544045 (1985-10-01), Runkle
patent: 4691809 (1987-09-01), Le Marchand et al.
patent: 4702354 (1987-10-01), Ingram et al.

Affiliated with

Also associated with

Rating

Automatic adjusting mechanism for a disc brake assembly having a does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic adjusting mechanism for a disc brake assembly having a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic adjusting mechanism for a disc brake assembly having a will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1521624