Abstract: A disc brake comprises at least two axially slidable brake discs. The brake discs are mounted for axial sliding movement under the dynamic conditions of use by means of a series of circumferentially spaced wire springs or leaf springs each of which simultaneously receives the at least two brake discs on the axially-extending structure of the spring. As a result, initiation of braking causes simultaneous axial sliding movement of the entire spring and multiple disc assembly as a unit, thereby achieving a more balanced braking action and more even friction pad wear.

Abstract: A disc brake system of the kind comprising an axially fixed hub and at least one slideable brake disc comprises a resilient device acting between the disc and the hub to control certain aspects of the movement of the brake disc during use. Despite the thermal differential arising in use between the brake disc and the central hub due to the localized heat generation of the brake system and the mass and thermal capacity differences between the hub and the brake disc, whereby the hub would be expected to provide a more satisfactory mounting, the resilient device acting between the disc and the hub to control the disc dynamics is mounted on the disc.

Abstract: A disc brake (3) of the kind comprising an axially fixed hub (2) and at least one slidable brake disc (4, 6) comprises resilient means (10) acting between the disc (4, 6) and the hub (2) to control certain aspects of the movement of the brake disc (4, 6) during use. The resilient means (10), is of a leaf spring format, acting between the disc (12, 14) and the hub to control the disc dynamics is mounted on the disc (4, 6). This leads to advantages in terms of spring structure and cost and independence of the resilient bias with respect to disc position and disc (12, 14) relationship to another disc (if present) and with respect to simplicity of mounting and avoidance of dirt entrapment. The mounting of the resilient means comprising clipping the resilient means over a drive key (12) of the disc (4, 6) though an aperture (23) defined within the resilient means (10) and having associated stiffening elements or strips (26a, 26b).

Abstract: A disc brake (10) comprises at least two axially slidable brake discs (12, 14). The brake discs are mounted for axial sliding movement under the dynamic conditions of use by means of a series of circumferentially spaced wire springs (42) or leaf springs each of which simultaneously receives the at least two brake discs on the axially-extending structure of the spring. As a result, initiation of braking causes simultaneous axial sliding movement of the entire spring and multiple disc assembly as a unit, thereby achieving a more balanced braking action and more even friction pad wear.

Abstract: A disc brake system of the kind comprising an axially fixed hub and at least one slideable brake disc comprises a resilient device acting between the disc and the hub to control certain aspects of the movement of the brake disc during use. Despite the thermal differential arising in use between the brake disc and the central hub due to the localized heat generation of the brake system and the mass and thermal capacity differences between the hub and the brake disc, whereby the hub would be expected to provide a more satisfactory mounting, the resilient device acting between the disc and the hub to control the disc dynamics is mounted on the disc. Such provides independence of the resilient bias with respect to disc position and disc relationship to another disc and with respect to simplicity of mounting and avoidance of dirt entrapment.

Abstract: A disc brake (3) of the kind comprising an axially fixed hub (2) and at least one slidable brake disc (4, 6) comprises resilient means (10) acting between the disc (4, 6) and the hub (2) to control certain aspects of the movement of the brake disc (4, 6) during use. The resilient means (10), is of a leaf spring format, acting between the disc (12, 14) and the hub to control the disc dynamics is mounted on the disc (4, 6). This leads to advantages in terms of spring structure and cost and independence of the resilient bias with respect to disc position and disc (12, 14) relationship to another disc (if present) and with respect to simplicity of mounting and avoidance of dirt entrapment. The mounting of the resilient means comprising clipping the resilient means over a drive key (12) of the disc (4, 6) though an aperture (23) defined within the resilient means (10) and having associated stiffening elements or strips (26a, 26b).

Abstract: A disc brake rotor (10; 50) provides two oppositely-facing annular friction surfaces (20, 22). The rotor (10; 50) comprises a first portion (16) which provides one of said annular surfaces (20), and a second portion (18) which provides the other of said annular surfaces (22). The first and second portions (16, 18) ar arranged in spaced parallel relationship and are joined by vanes (32) between which are defined cooling ducts (34). The ducts (34) extend radially of the rotor (10; 50) and are arranged so that, as the rotor (10; 50) is rotated, air passes through the ducts (34) and acts to cool the rotor (10; 50). In order to increase cooling efficiency, the transverse cross-sectional area of each duct (34) decreases progressively between an inlet (36) to the duct (34) and an intermediate region (40) thereof and increases between said intermediate region and an outlet (38) of the duct (34).

Abstract: A disc brake rotor comprises mounting portion, a first friction portion which provides an annular friction surface, a second friction portion which provides the other of annular friction surface, a connecting portion which joins the mounting portion to the first friction portion, and vanes which extend between the friction portions and support the second friction portion. The vanes define cooling ducts extending radially outwardly of the rotor. The first and the second friction portions vary in thickness in radial directions, the first friction portion having its greatest thickness at a radius which is greater than the radius at which the second friction portion has its greatest thickness.