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.

Date of Patent:
Nov. 13, 1979

Filed:

Jan. 26, 1978
Applicant:
Inventor:

Yutaca Hagiwara, Fujisawa, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16D / ;
U.S. Cl.
CPC ...
188 / ; 116208 ; 188 735 ; 192 / ;
Abstract

A disc brake is provided with a warning device or sensor made of a springy material. The sensor is mounted within an space between a friction disc and pad assembly and a yoke, and has a tongue portion formed with a section adapted to rub on a rotating disc at an area disposed outside of the contact surface. When a friction pad is worn out to a predetermined thickness, the section rubs on the disc, emitting an audible warning sound to alert the driver that something is wrong and he should take appropriate action.


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Hagiwara, Yutaca. (1979). Warning device for indicating wear of friction pads in disc brake (U.S. Patent No. 4174024). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4174024

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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