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. 09, 2019
Filed:
Nov. 03, 2016
Hyundai Motor Company, Seoul, KR;
Jae Young Lee, Yongin-si, KR;
Yoon Joo Rhee, Suwon-si, KR;
Byung Chan Lee, Suwon-si, KR;
Jai Min Han, Suwon-si, KR;
Yoon Cheol Kim, Suwon-si, KR;
Hyundai Motor Company, Seoul, KR;
Abstract
A vehicle brake pad includes a back plate layer, an underlayer, an adhesive layer that mediates between the back plate layer and the underlayer, and a friction material layer, wherein the vehicle brake pad does not include a shim and wherein at least one of the back plate layer, the adhesive layer, and the underlayer has a loss factor of 0.2 or higher, calculated according to the following Equation 1, at temperatures from −100 to 300° to damp noise of a frequency range of 200 to 20,000 Hz at temperatures from −100 to 300°: (Equation 1) Loss factor η=(f−f)/f, where η is a loss factor, fis a noise frequency, fis a minimum value of amplitude of a noise frequency when a noise level is reduced by 3 dB, and fa maximum value of amplitude when the noise level is reduced by 3 dB.