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. 16, 2001
Filed:
Mar. 02, 2001
William Gronowicz, Jr., Westland, MI (US);
Yazaki North America, Inc., Canton, MI (US);
Abstract
A sensor is attached to a backing plate of a brake pad. The sensor comprises a metal arm extending to one side of the brake pad. The metal arm is electrically insulated from the backing plate. A tab made from a dielectric material projects from a free end of the arm in the same direction that the brake pad extends from the backing plate. The tab is bonded to the arm by an electrically conductive paste. The tab has a wear face spaced from the backing plate the same distance as a brake surface of the brake pad. When a brake is applied by a vehicle operator, both the brake pad brake surface and the tab wear face frictionally engage a brake rotor fixed to a wheel hub. The dielectric material is selected so the tab wears at the same rate as the brake pad. A lead wire connected to the arm enables the capacitance of the tab to be measured by a grounded capacitance meter when the brake is applied. The capacitance changes as the dielectric material wears away. The capacitance is used to indicate the remaining amount of brake pad life on a digital readout.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile