Flanged brake shoe
AssigneeRfpc Holding Corp.
InventorA. Gary Bowden
Life of this patent
Estimating the term…
Abstract
A brake shoe includes a backing plate configured to interface with a brake head of a vehicle. The backing plate includes a main body and a flange attached to the main body and configured to align the brake shoe on a wheel of the vehicle. The brake shoe also includes a composition friction material disposed on the backing plate, which defines a brake surface for engaging the wheel. The brake shoe may have one or more dimensional characteristics for facilitating alignment of the brake shoe with the wheel, e.g., a ratio of a shortest horizontal distance to a shortest vertical distance of the brake shoe may be at least 1.07 and no more than 1.25, or a ratio of a length of the main body of the brake shoe to a length of the flange may be at least 1.3 and not more than 1.7.
Claims24
A brake shoe comprising:
- a backing plate configured to interface with a brake head of a vehicle, the backing plate comprising a main body and a flange attached to the main body and configured to align the brake shoe on a wheel of the vehicle;
- and
- a composition friction material disposed on the backing plate and defining a brake surface for engaging the wheel of the vehicle, wherein a ratio of a length of the main body of the brake shoe to a length of the flange is at least 1.3 and not more than 1.7.
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A brake shoe comprising:
- a backing plate configured to interface with a brake head on a vehicle;
- a composition friction material disposed onto the backing plate to form a brake surface of the brake shoe for engaging a wheel of the vehicle, the composition friction material comprising two opposing ends and two opposing lateral sides;
- and
- at least one wear indicator formed in the backing plate and the composition friction material at an intersection of one of the opposing ends, one of the lateral sides, and the backing plate,
- wherein the at least one wear indicator comprises a width of no less than 3 millimeters and no more than 7 millimeters,
- wherein the at least one wear indicator further comprises a length of no less than 15 millimeters and no more than 25 millimeters, and
- wherein the at least one wear indicator further comprises a depth of no less than 9 millimeters and no more than 11 millimeters.
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A brake shoe comprising:
- a backing plate configured to interface with a brake head of a vehicle, the backing plate comprising a main body and a flange attached to the main body and configured to align the brake shoe on a wheel of the vehicle;
- a composition friction material disposed onto the backing plate to form a brake surface of the brake shoe for engaging a wheel of the vehicle, the composition friction material comprising two opposing ends and two opposing lateral sides;
- at least one tread conditioning insert disposed within the composition friction material and comprising a wheel conditioning surface which forms a working surface with the brake surface of the brake shoe that contacts the wheel during braking;
- and
- at least one wear indicator formed in the backing plate and the composition friction material at an intersection of one of the opposing ends, one of the lateral sides, and the backing plate.
Dependencies are inferred from the claim text.