Disc brake assembly
AssigneeThe Bendix Corporation
InventorsIrving R. Ritsema, James J. Colpaert
Life of this patent
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Abstract
A disc brake includes a caliper assembly (12) cooperating with a pair of friction elements ((14, 16) to brake a rotor (10). A pin assembly (30) supports the caliper assembly (12) and includes a bolt (34) defining an axial spacing for a sleeve (36) which engages the caliper assembly (12) via a resilient bushing (32). The sleeve is permitted to move axially through a clearance (62) with each brake application and a spring (38) biases the sleeve and caliper to always retract through the clearance upon termination of braking.
Claims11
A disc brake assembly comprising a torque member secured to a nonrotatable portion of a vehicle, a caliper assembly movably disposed relative to the disc by means of at least one pin assembly connecting the caliper assembly to the torque member, a pair of friction elements cooperating with the caliper assembly during braking to engage the disc to retard rotation of the latter, and the pin assembly including a bolt threadably coupled to the torque member and extending through an opening in the caliper assembly, a resilient bushing engaged to the caliper assembly and extending through the caliper assembly opening, and a sleeve disposed between the resilient bushing and the bolt, characterized by said sleeve cooperating with said bolt to define a predetermined axial clearance therebetween, said predetermined axial clearance providing for said sleeve to move with said caliper assembly and said resilient bushing initially during braking, said resilient bushing moving relative to said sleeve after said predetermined axial clearance is taken up between said sleeve and bolt during braking in order to define an adjusted position for said resilient bushing and caliper assembly relative to said sleeve in response to wear of said friction elements, and said pin assembly further including a resilient member extending between said sleeve and said bolt to bias said sleeve to a position maintaining said predetermined axial clearance between said sleeve and said bolt.
A pin assembly for carrying a vehicle caliper assembly which is movable during braking to engage at least one friction element with a rotor, said pin assembly comprising:
- a bolt secured at one end to a nonrotatable portion of said vehicle adjacent said rotor, said bolt defining an outer recess extending axially from said one end to an opposite end forming a head;
- a sleeve disposed within said outer recess and cooperating with said bolt head to define a predetermined axial clearance at one end of said sleeve remote from said rotor;
- and
- a resilient member extending between said sleeve and said bolt head to bias said sleeve away from said bolt head and toward said rotor to a rest position within said outer recess;
- said sleeve being movable with said caliper assembly away from said rotor to take up said predetermined axial clearance and load said resilient member during braking and said resilient member cooperating with said caliper assembly via said sleeve upon termination of braking to return said sleeve in the direction of said rotor to its rest position and to return said caliper assembly to its rest position.
Dependencies are inferred from the claim text.