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:
Jul. 22, 2025
Filed:
Dec. 22, 2022
GM Global Technology Operations Llc, Detroit, MI (US);
Heewook Lee, Oakland Township, MI (US);
Zhongyi Liu, Troy, MI (US);
Anil K. Sachdev, Rochester Hills, MI (US);
Tyson Whittier Brown, Royal Oak, MI (US);
Ratandeep Singh Kukreja, Auburn Hills, MI (US);
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Abstract
A brake drum having a composite structure includes a cylindrical body defining an inner friction surface and an outer surface. The cylindrical body includes a drum core comprising an Al—Si alloy, the drum core including an inner surface, and an outer surface of the drum core defining the outer surface of cylindrical body. The cylindrical body includes a thermal barrier layer comprising a thermally insulating material on the inner surface of the drum core, and a wear-resistant layer comprising an Fe—Al—Si—Zr alloy on the inner surface of the drum core over the thermal barrier layer, the wear-resistant layer defining the inner friction surface of the cylindrical body.