Societe Anonyme Francaise Du Ferodo

Leonce E Rogier

Jean-Claude Depoisier

A brake having axially-expanding brake shoes, comprises an actuating block radially located in a peripheral annular groove formed in a rotating member. The actuating block possesses along its axis, a plurality of cylinders in which slide pistons which apply the brake shoes against the braking surfaces formed by the opposite radially-extending faces of the groove. According to the invention, the actuating block comprises a single, solid, center support plate, and the ends of the cylinders project axially over the transverse faces of this support plate.

Brake with axially expanding brake shoes

A method of providing an improved friction surface and a friction element having such an improved friction surface are disclosed. A surface of a metallic friction element, e.g. a brake pad or a brake disc or drum, is metal-sprayed with a metallic substance which defines asperities the average roughness Ra of which ranges between 3 and 60 microns. Preferably, at least some of the asperities have heights ranging between 20 and 40 microns for a base width between 0.5 and 1 mm.

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St Denis, France

Leonce E Rogier