Hybrid brake assembly with friction pads of different compositions
AssigneePneumo Abex Corporation
InventorJohn P. Kwolek
Life of this patent
Estimating the term…
Abstract
A hybrid brake assembly is provided with both a resin-bonded metallic friction pad element and a resin-bonded non-asbestos, non-metallic friction pad element and hydraulic cylinder/piston elements for simultaneously actuating both friction pad elements in a vehicular braking operation.
Claims6
In a vehicular wheel brake assembly, in combination:
- a first friction-generating friction pad assembly having a metallic backing plate element and a resin-bonded metallic friction pad element joined to the backing plate element;
- a second friction-generating friction pad assembly having a metallic backing plate element and a resin-bonded non-asbestos, non-metallic friction pad element joined to the backing plate element;
- and
- means for simultaneously activating said first and second friction pad assemblies to generate friction at the surfaces of said resin-bonded metallic friction pad element and said resin-bonded non-asbestos, non-metallic friction pad element.
A resin-bonded brake friction pad element comprising approximately from 25 to 60 parts metallic particles, approximately from 5 to 15 parts resin binder particles, approximately from 10 to 25 parts carbonaceous particles, approximately from 0 to 8 parts abrasive particles, approximately from 3 to 25 parts filler particles, and approximately from 1 to 10 parts friction particles, all said parts proportions being on a percentage weight basis.
A brake friction pad element comprising approximately from 10 to 25 parts fiber particles excluding asbestos fiber particles, approximately from 8 to 20 parts resin binder particles, approximately from 2 to 18 parts carbonaceous particles, approximately from 2 to 20 parts abrasive particles, approximately from 20 to 40 parts filler particles, and approximately from 5 to 20 parts friction particles, all said parts proportions being on a percentage weight basis.
Dependencies are inferred from the claim text.