Abstract: A normally closed check valve has an ephemeral seal on the entry side thereof which blocks fluid flow through the check valve at pressure differentials acting across the check valve which would normally open the check valve and cause fluid flow to occur through the check valve. The ephemeral seal is a high viscosity material which when heated to a temperature well above the normally encountered ambient temperature will become of sufficiently low viscosity to flow from the check valve entry and be removed from blocking the opening of the check valve. The ephemeral seal is usually so heated by operation of the mechanism in which the check valve and ephemeral seal are installed, such operation normally creating sufficient heat to heat the ephemeral seal to that temperature which causes it to be of sufficiently low viscosity to flow away from the check valve entry. The mechanism disclosed which uses the check valve and a preferred embodiment of the ephemeral seal is a disc brake caliper assembly.

Abstract: A noise and heat insulator is incorporated in a brake shoe retainer assembly which holds the shoe to the disc brake piston.

Abstract: A disc brake torque-taking bracket has integral bolt-like extensions passing through openings in caliper housing ears. Boot seals are provided on both sides of the ears. This requires no mounting bolts or locking devices, permits non-critical caliper machining in the mounting area, and is easily assembled.

Abstract: A caliper mounting boss has a nylon guide sleeve lined with a rubber support bushing through which the caliper mounting bolt extends. The nylon guide sleeve has one end snapping into a groove on the mounting bolt. The bore in the mounting boss through which the assembly extends has wiper seals at each end.

Abstract: Resilient rings are fitted between the caliper and the mounting bolts to provide free caliper movement and permanent corrosion protection. One resilient ring has internal lands contracting the mounting bolt and positioned within the caliper. The lands act as a rubber spring with memory which retracts the caliper, reducing brake drag. Reduced rubber contact area with the mounting bolt reduces adhesion of the rubber to the bolt. The resilient ring may alternatively have external lands which grip or slip on the caliper housing instead of the mounting bolt. A seal may be provided as an extension of the one resilient ring to protect the mounting bolt surface.

Abstract: A disc brake pad assembly has clench tabs extending through rubber-like grommets in openings in a caliper housing leg so that the grommets are retained in the openings and the brake pad assembly is retained on the housing leg. The grommets provide a noise dampening action during braking to reduce brake noise.