Disc brake assembly
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsKiyotaka Murai, Kenji Takahashi
Life of this patent
Estimating the term…
Abstract
A disc brake assembly having a pair of brake shoes to be pressed into contact with a disc rotor secured for rotation with a road wheel of an automotive vehicle, wherein the brake shoes each are provided with a pair of laterally spaced friction pad members respectively formed in a trapezoid configuration the outer sides of which are formed as hypotenuse, and wherein a distance between upper opposite ends of each pair of the friction pad members is determined to be less than about {fraction (1/12)} of the circumferential length of said disc rotor.
Claims3
A disc brake assembly having a pair of brake shoes each with a friction pad member to be pressed into contact with a disc rotor having a circumferential length secured for rotation with a road wheel of an automotive vehicle, wherein upon contact with the brake shoes, the disc rotor oscillates at a three-nodes diametric mode.
- wherein each friction pad member of said brake shoes has an upper portion with a total width determined to be less than substantially {fraction (1/12)} of the circumferential length of said disc rotor at a position where said rotor is brought into frictional engagement with the upper portion of said friction pad member so that the friction pad member reduces oscillation frequencies of said disc rotor so that occurrence and level of brake noises noticeably decrease,
- wherein each friction pad member comprises a pair of laterally spaced friction pads respectively formed in an approximately trapezoidal shape, wherein the outer sides of each friction pad are formed as an oblique side having an upper outermost end, and wherein a distance between said upper outermost opposite ends of each pair of said friction pads is determined to be less than substantially {fraction (1/12)} of the circumferential length of said disc rotor.
A disc brake assembly having a pair of brake shoes each with a friction pad member to be pressed into contact with a disc rotor having a circumferential length secured for rotation with a road wheel of an automotive vehicle, wherein upon contact with the brake shoes, the disc rotor oscillates at a three-nodes diametric mode,
- wherein each friction pad member of said brake shoes has an upper portion with a total width determined to be less than substantially {fraction (1/12)} of the circumferential length of said disc rotor at a position where said rotor is brought into frictional engagement with the upper portion of said friction pad member so that the friction pad member reduces oscillation frequencies of said disc rotor so that occurrence and level of brake noises noticeably decrease,
- wherein each friction pad member comprises a pair of laterally spaced rectangular friction pads, and wherein a distance between upper outermost opposite ends of each pair of said friction pads is determined to be less than substantially {fraction (1/12)} of the circumferential length of said disc rotor.
A disc brake assembly having a pair of brake shoes to be pressed into contact with a disc rotor secured for rotation with a road wheel of an automotive vehicle,
- wherein each of said brake shoes has a friction pad member having an upper portion opposite a lower portion, the upper portion having an upper width less than a lower width of the lower portion, and the upper width in total is less than about {fraction (1/12)} of a circumferential length of said disc rotor at a position where said disc rotor is brought into frictional engagement with the upper portion of said friction pad member,
- wherein each of said friction pad members is formed in at least two laterally spaced portions and wherein the upper width and lower width are measured at outside edges of outermost laterally spaced portions.
Dependencies are inferred from the claim text.