Disc brake assembly and method
AssigneeGarlock Inc.
InventorDennis N. Denton
Life of this patent
Estimating the term…
Abstract
A disc brake assembly 10 and method for preventing binding of disc brake caliper slider pins 34 in bushing seals 14 of a disc brake caliper 18. The bushing seal 14 is a unitary, molded, tubular article including a molded tubular elastomeric body 44 having a hydraulically formed tubular polytetrafluoroethylene liner 46 bonded to the I.D. of the elastomeric body and having a polytetrafluoroethylene scraper lip 48 adjacent the inboard end 50 of the bushing seal for scraping foreign particles off of the slider pin 34 to keep them out of the bushing seal 14 where they could cause binding. The bushing seal 14 also has a smooth tapering O.D. surface such that it can be easily installed in a slider pin bore 30.
Claims13
A method for preventing binding of a disc brake slider pin in a bushing of a disc brake caliper comprising:
- (a) inserting, into a slider pin bore of a disc brake caliper, a unitary, one-piece, molded, tubular bushing seal including a molded tubular elastomeric body and a simultaneously hydraulically formed tubular polytetrafluoroethylene liner bonded to the inside diameter of said elastomeric body, said liner including a polytetrafluoroethylene scraper lip adjacent the inboard end of said bushing seal for scraping foreign particles off of the below-recited slider pin as said caliper and bushing seal move relative to said slider pin, said scraper lip portion of said liner being bonded to and being in direct contact with a portion of said elastomeric body, said portion of said elastomeric body being located directly radially outwardly from said scraper lip and being solid and continuous throughout its radial dimension such that said portion of said body provides an elastomeric backing for holding said scraping lip in scraping contact with said slider pin, and
- (b) installing a disc brake slider pin through said bushing seal, such that said polytetrafluoroethylene scraper lip is in scraping contact with said slider pin.
Apparatus comprising a disc brake assembly including an adaptor, at least one disc brake slider pin connected to said adaptor, a caliper having at least one slider pin bore, a bushing seal positioned in said at least one slider pin bore, said at least one slider pin being movably located inside of said at least one bushing seal whereby said caliper is movably mounted on said adaptor, and a pair of movable disc brake pads mounted on said adaptor, said at least one bushing seal comprising a unitary, one-piece, molded, tubular bushing seal including a molded, tubular, elastomeric body and a simultaneously, hydraulically formed tubular polytetrafluoroethylene liner bonded to the inside diameter of said elastomeric body, said liner having a polytetrafluoroethylene scraper lip adjacent the inboard end of said bushing seal in scraping contact with the outside diameter surface of said at least one slider pin extending therethrough, said scraper lip portion of said liner being bonded to and being in direct contact with a portion of said elastomeric body, said portion of said elastomeric body being located directly radially outwardly from said scraper lip and being solid and continuous throughout its radial dimension such that said portion of said body provides an elastomeric backing for holding said scraper lip in scraping contact with said slider pin.
Dependencies are inferred from the claim text.