Expansible chamber devices – With guide or seal on cylinder end portion for piston or... – Non-metallic seal means between piston or member and end...
Patent
1978-08-01
1980-10-21
Maslousky, Paul E.
Expansible chamber devices
With guide or seal on cylinder end portion for piston or...
Non-metallic seal means between piston or member and end...
277165, 277170, 188 718, 188196P, F16J 1518
Patent
active
042287260
ABSTRACT:
An improved seal is disclosed for hydraulically sealing a piston-cylinder assembly used in activation of a floating caliper disc brake. The improved seal comprises an annular groove circumscribing the cylinder wall within which a ring type elastomeric seal is seated so as to sealingly engage the piston. The floor of the annular groove has a flat portion and sloped portion. By varying the ratio of the flat portion to the sloped portion a desired axial force resisting retraction of the piston into the cylinder may be pre-determined thereby preventing excessive brake shoe drag upon the rotor.
REFERENCES:
patent: 1400422 (1921-12-01), Curtis
patent: 2116705 (1938-05-01), Marx et al.
patent: 3377076 (1968-04-01), Burnett
patent: 3421604 (1969-01-01), Hobbs
patent: 3497038 (1970-02-01), Schrader et al.
patent: 3998466 (1976-12-01), Kondo
patent: 4156532 (1979-05-01), Kawaguchi et al.
Evans Anthony C.
Rinker Kurt H.
Kelsey Hayes Co.
Maslousky Paul E.
Skinkiss Ralph J.
Wangerow Ronald W.
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