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:
Apr. 01, 1997
Filed:
Mar. 17, 1995
Applicant:
Inventors:
Kinzo Kobayashi, Yamanashi-ken, JP;
Shinichi Izumi, Yamanashi-ken, JP;
Shinji Suzuki, Yamanashi-ken, JP;
Shinichi Nakayama, Yamanashi-ken, JP;
Assignee:
Tokico Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16D / ; F16D / ;
U.S. Cl.
CPC ...
188 7335 ; 188 725 ; 188370 ; 188 7337 ; 92172 ;
Abstract
A disc brake having a plurality of pistons with the same outer diameter fitted in a cylinder portion of a caliper on at least one side of a disc so that the pistons cause a pad to press against the disc. At least one of the pistons has a relatively large wall thickness so that it is different from the other pistons in pad pressing area, and its natural frequency falls outside the range of from 20 Hz to 20 kHz, thereby suppressing the generation of brake noise.