The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 21, 1980
Filed:
Aug. 01, 1978
Applicant:
Inventors:
Kurt H Rinker, Ann Arbor, MI (US);
Anthony C Evans, Westland, MI (US);
Assignee:
Kelsey Hayes Co., Romulus, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F16J / ;
U.S. Cl.
CPC ...
92168 ; 277165 ; 277170 ; 188 718 ; 1881 / ;
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.