Vehicle disc brakes of the liquid cooled type
AssigneeLucas Industries Limited
InventorsRoy Campbell, Anthony G. Price, Andrew P. Green
Life of this patent
Estimating the term…
Abstract
A rotatable member for a brake of the liquid cooled type comprises a disc provided on opposite sides with annular braking faces. The disc incorporates a plurality of angularly spaced liquid supply slots which extend through the material of the disc and radially outwards from a position inwardly of the inner peripheral edges of the braking faces. A portion at the inner end of each slot is of a circumferential length greater than the remainder of the slot. The member may comprise a braking member for the brake, or it may be separate from the brake and act as a pump member in the form of a turbo disc.
Claims19
A rotatable braking member for a brake of the liquid-cooled type comprising a rotatable disc having an annular braking surface adapted for engagement with a relatively stationary braking surface of a brake in which said member is to be fitted, said annular braking surface having an inner peripheral edge and an outer peripheral edge, and the disc incorporates a plurality of angularly spaced liquid supply grooves in the form of slots which extend completely through the material of the disc, each said slot having a redial arm portion and a circumferential arm portion extending substantially perpendicularly to said radial arm portion, said radial arm portions extending radially outwards from respective circumferential arm portions of said slots which are disposed at a position inward of said inner peripheral edge of said annular braking surface, and wherein said circumferential arm portion of each said slot is of a circumferential length greater than any portion of the circumferential width of said associated radial arm portion.
A self-energising disc brake of the liquid-cooled type comprising a housing containing cooling liquid and defining a sump, at least one rotatable friction braking member disposed within said housing and slidably keyed to a shaft to be braked, annular braking surfaces on opposite sides of said braking member, relatively stationary braking surfaces in said housing, and actuating means for urging said annular braking surfaces and said relatively stationary braking surfaces into engagement to apply said brake, wherein each said annular braking surface has an inner peripheral edge and an outer peripheral edge, and said braking member incorporates a plurality of angularly spaced liquid supply grooves in the form of slots which extend completely through the material of the braking member and radially outwards from a position inwardly of said inner peripheral edges of said braking surfaces, each said slot having a radial arm portion and a circumferential arm portion extending substantially perpendicularly to said radial arm portion, said radial arm portions extending radially outwards from respective circumferential arm portions of said slots which are disposed at a position inward of said inner peripheral edge of said braking surface, and wherein said circumferential arm portion of each said slot is of a circumferential length greater than any portion of the circumferntial width of said associated radial arm portion.
A brake of the liquid cooled type comprising a housing containing cooling liquid and defining a sump, braking means disposed within said housing, and a rotatable pump member for circulating said cooling liquid through said braking means, wherein said pump member comprises a rotatable disc defining an annular pumping surface having an inner peripheral edge and an outer peripheral edge, and said disc incorporataes a plurality of angularly spaced liquid supply grooves in the form of slots which extend completely through the material of the disc and radially outwards from a position inwardly of the inner peripheral edge, each said slot having a radial arm portion and a circumferential arm portion extending substantially perpendicularly to said radial arm portion, said radial arm portions extending radially outwards from respective circumferential arm portions of said slots which are disposed at a position inward of said inner peripheral edge of said pumping surface, and wherein said circumferential arm portion of each said slot is of a circumferential length greater than any portion of the circumferential width of said radial arm portion of said associated radial arm portion.
Dependencies are inferred from the claim text.