Brake lining for a drum brake assembly
AssigneeFederal-Mogul Products, Inc.
InventorWeiming Liu
Life of this patent
Estimating the term…
Abstract
An improved drum brake assembly for reducing braking vibrations and noise. The improved assembly includes a pair of shoes, each extending through an arc and presenting an outer shoe surface. A pair of brake linings of a friction material are coupled to the outer shoe surface. Each of the brake linings has an upper surface and a pair of oppositely facing chamfered edges. Each chamfered edge has an arc length of no less than one inch and is disposed at an angle of between ten and twenty-five degrees from the tangent of the upper surface where it meets the chamfered edge.
Claims20
A brake lining for a drum brake assembly of a heavy-duty vehicle comprising:
- said brake lining being of a friction material and having an upper surface and presenting a pair of oppositely facing chamfered edges which extend through less than an entire thickness of said brake lining, and
- wherein said oppositely facing chamfered edges are the only chamfered edges on said brake lining and comprise between twenty-five and thirty-five percent of the arcuate length of said brake lining and wherein each of said chamfered edges is disposed at an angle of between ten and twenty-five degrees from the tangent of said upper surface where it meets said chamfered edge.
A shoe for a drum brake assembly of a heavy-duty vehicle comprising:
- said shoe extending through an arc and presenting an outer shoe surface;
- at least one brake lining coupled to said outer shoe surface and being of a friction material;
- said brake lining having an upper surface and presenting a pair of oppositely facing chamfered edges which extend through less than an entire thickness of said brake lining;
- and
- wherein said oppositely facing chamfered edges are the only chamfered edges on said brake lining and comprise between twenty-five and thirty-five percent of the arcuate length of said brake lining and wherein each of said chamfered edges is disposed at an angle of between ten and twenty-five degrees from the tangent of said upper surface where it meets said chamfered edge.
A drum brake assembly for slowing a vehicle having a drum with a circular drum surface comprising:
- a pair of shoes, each extending through an arc and presenting an outer shoe surface;
- at least one brake lining coupled to at least one of said outer shoe surfaces and being of a friction material;
- said brake lining having an upper surface and presenting a pair of oppositely facing chamfered edges which extend through less than the entire thickness of said brake lining;
- and
- wherein said oppositely facing chamfered edges are the only chamfered edges on said brake lining and comprise between twenty-five and thirty-five percent of the arcuate length of said brake lining and wherein each of said chamfered edges is disposed at an angle of between ten and twenty-five degrees from the tangent of said upper surface where it meets said chamfered edge.
Dependencies are inferred from the claim text.