Abstract: A rigid and deformable hydraulic seal for a force-applying mechanism, the seal being interposed between a piston and a housing cavity. This seal is generally cup-shaped and has an annular outer end portion that is rigidly retained in a peripheral groove of the housing cavity. Adjacent to this end portion is a half torus or single convolution hoop portion open toward the cavity, with the seal further including a generally cylindrical side surface and a circular bottom portion, with this seal, together with the cavity, defining a fluid-tight variable volume chamber. Fluid pressure supplied to this chamber causes plastic deformation of the seal and permits relative motion to occur between the piston and housing.

Abstract: A brake retractor assembly in which the automatic adjustment apparatus includes a perforated drag tube and a ball carried by an adjusting pin engageable with the tube. The ball is slightly larger than the inside diameter of the tube so that as the brake wears the ball is forced into the tube causing successive sections between the perforations to rupture and provide the necessary adjustment for wear.

Abstract: A multiple disc brake having a brake actuating annular pressure plate energized by a plurality of circumferentially arranged fluid pressure responsive pistons housing brake adjusting/reset members including a deformable fixed tube and associated movable ball for deforming the same wherein the deformable tube is engageable with spaced apart fixed stops and spring actuated from one stop to a second stop upon release of the brake to establish a predetermined brake running clearance.

Abstract: An automatically operative brake adjuster includes a cup-shaped member attached to a brake carrier member, with this member cooperating with a stepped bore in the carrier member to form an annular chamber having spaced opposed end surfaces. An annular follower member, slidably received and spring-biased within the annular chamber, has flange portions on opposite ends, with these flange portions cooperating with the opposed end surfaces to limit the movement of the follower member in both the brake-release and the brake-application directions. A piston, extending freely through the annular chamber, includes a tapered portion that carries a deformable hollow member in the annular chamber and is interference-fitted therewith.