Invention Grant
US07731001B1 Disc brake 有权
盘式制动器

Disc brake
Abstract:
A retraction arrangement for moving a piston in a bore of a caliper to a position of rest after each brake application. The retraction arrangement includes a cylindrical body with a plurality of inward projecting fingers that engage and apply a radial spring force on the piston. Each finger is defined by a cylindrical section that transitions into a first arcuate section that transitions into a radial section that transition into a second arcuate section that engages the piston. The second arcuate section moves with the piston during a brake application causing the fingers to pivots with respect to the cylindrical body resulting in a decrease in the radial spring force while creating an increasing axial spring force in each finger. On termination of the brake application, the axial spring force returns the piston to the position of rest to establish a running clearance between a friction member and the rotor.
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