Integrated parking brake for disc brake
AssigneePerformance Friction Corporation
InventorsDonald L. Burgoon, Mark Wagner, Darin Cate
Life of this patent
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Abstract
A parking brake actuator for a disc brake caliper having at least one service piston. The parking brake actuator includes a tapered collet having an axial bore for receiving the service piston; a release piston, said release piston in axially alignment with the service piston and said tapered collet, said release piston having an internally disposed taper for co-acting with the taper of said tapered collet; and a biasing means, said biasing means structured and arranged to apply a force to said release piston sufficient to place the parking brake actuator in an actuated condition.
Claims26
A parking brake actuator for a disc brake caliper having at least one service piston, said parking brake actuator comprising:
- a tapered collet having an axial bore for receiving the service piston;
- a release piston, said release piston in axially alignment with the service piston and said tapered collet, said release piston having an internally disposed taper for co-acting with the taper of said tapered collet;
- and
- a biasing means, said biasing means structured and arranged to apply a force to said release piston sufficient to place the parking brake actuator in an actuated condition.
A disc brake having an integral parking brake, comprising a disc brake caliper having a service brake piston slideably disposed within an annular locking means.
A disc brake caliper having at least one integral parking brake actuator, comprising:
- at least one service brake piston slideably disposed within the caliper;
- a tapered collet having an axial bore for receiving and surrounding an outer circumference of said service brake piston;
- an annular release piston surrounding an outer circumference of said collet;
- and
- biasing means disposed at an end of and in contact with said release piston.
A disc brake caliper having an integral parking brake comprising a parking brake actuator structured and arranged to apply an actuation force in a direction away from a disc brake pad disposed within said caliper to lock a service brake piston and effect the braking action of said parking brake.
A method of actuating a parking brake having a parking brake actuator, the parking brake actuator including an annular locking means disposed about a brake piston, the annual locking means including a tapered collet having an axial bore for receiving the brake piston, an annular release piston surrounding the tapered collet, and biasing means disposed at one end of said release piston, the method comprising the steps of:
- a) removing hydraulic pressure from a first end of the release piston;
- b) decompressing the biasing means to exert a force against a second end of the release piston;
- c) forcing the release piston in a direction so as to wedge an inner surface taper against an outer surface taper of the tapered collet;
- d) applying radial pressure to the tapered collet and thereby to an outer circumferential surface of the brake piston, fixing the position of the brake piston;
- and
- e) maintaining a brake pad in pressurized contact against a rotor, so as to lock the parking brake.
Dependencies are inferred from the claim text.