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:
Feb. 20, 2024
Filed:
Apr. 26, 2021
Aisin Corporation, Kariya, JP;
Tohken Thermo Tech Co., Ltd, Neyagawa, JP;
Chengji Jin, Kariya, JP;
Hodo Suzuki, Kariya, JP;
Masaki Kajino, Nagoya, JP;
Kazuya Kitamura, Osaka, JP;
Naoyuki Omori, Osaka, JP;
AISIN CORPORATION, Kariya, JP;
TOHKEN THERMO TECH CO., LTD, Neyagawa, JP;
Abstract
A low friction wear film includes a chromium layer provided on a surface of a metal substrate, a tungsten carbide layer provided on a surface of the chromium layer, and a diamond-like carbon layer as a top layer provided on a surface of the tungsten carbide layer. The tungsten carbide layer includes a chromium-tungsten carbide gradient layer and a tungsten carbide uniform layer. In the tungsten carbide layer, a tungsten-concentrated layer in which a tungsten simple substance is present is not provided at a boundary between the chromium-tungsten carbide gradient layer and the tungsten carbide uniform layer.