Brakes – Wheel – Axially movable brake element or housing therefor
Patent
1985-07-05
1989-03-07
Butler, Douglas C.
Brakes
Wheel
Axially movable brake element or housing therefor
188370, F16D 5518
Patent
active
048098213
ABSTRACT:
Disc brake assembly (10) includes a phenolic piston (16) disposed within a bore (14) of a housing (11), the piston (16) movable relative to the housing (11) in order to engage brake shoe pads (18, 20) with the disc (22) of the brake assembly. An interior seal ring (42) and an exterior boot seal (60) are disposed between the bore (14) and piston (16) in order to prevent contaminants from entering into the bore and damaging the phenolic piston. Located between an annular groove (40) receiving the interior seal ring (42) and an exterior opening (50) receiving one end of the exterior boot seal (60), is a land (70). The land (70) is protected by a corrosion resistant barrier (80) which protects the land from oxidation and subsequent lock-up of the phenolic piston (16), and provides a low friction surface for engagement with the slidable piston.
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Allied-Signal Inc.
Butler Douglas C.
Decker Ken C.
Palguta Larry J.
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