Back to results
US 7,424,936 B2Granted
Brake pad with wear indicator
OwnerWilliam Thomas McClellaninventor
Life of this patent
Estimating the term…
Abstract
A brake pad includes a backing plate and a friction material layer attached to the backing plate. At least one inner layer is disposed within the friction material layer. The inner layer has a color different than the friction material layer.
Claims9
A brake pad for a wheel, comprising:
- a backing plate;
- an outer friction material layer attached to said backing plate, hidden from outside the wheel and shedding particles, visible from outside the wheel, upon being worn, said outer friction material layer having a lateral extent and a vertical extent;
- and
- a plurality of inner friction material layers formed of the same friction material as said outer friction material layer, disposed within and completely surrounded by said outer friction material layer for maintaining brake pad integrity, structural strength, internal cohesiveness and adhesive bonding from said backing plate to an outer face of said outer friction material layer, said plurality of inner friction material layers being hidden from outside the wheel, having a color different than said outer friction material layer and shedding particles, visible from outside the wheel, of said color different than said outer friction material layer upon being worn, said plurality of inner friction material layers being disposed only in part of said lateral extent and only in part of said vertical extent of said outer friction material layer to slowly increase and prevent an inward spread of the particles.
1 more element
A brake pad for a wheel, comprising:
- a backing plate;
- an outer friction material layer attached to said backing plate, having a lateral extent, being hidden from outside the wheel and shedding particles, visible from outside the wheel, upon being worn;
- and
- at least one inner friction material layer disposed within and completely surrounded by said outer friction material layer, said at least one inner friction material layer being hidden from outside the wheel, having a color different than said outer friction material layer and shedding particles, visible from outside the wheel, of said color different than said outer friction material layer upon being worn, and said at least one inner friction material layer being disposed only in approximately an outer half of said lateral extent, to slowly increase and prevent an inward spread of the particles.
1 more element
Dependencies are inferred from the claim text.