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:
Nov. 06, 2012
Filed:
Dec. 01, 2008
Hirotaka Ito, Kobe, JP;
Kenji Yamamoto, Kobe, JP;
Hirotaka Ito, Kobe, JP;
Kenji Yamamoto, Kobe, JP;
Kobe Steel, Ltd., Kobe-shi, JP;
Abstract
A diamond-like carbon film for sliding parts which is applied to the sliding surface of sliding parts, the diamond-like carbon film including at least two layers, one being a lower layer of diamond-like carbon (referred to as DLC hereinafter) and the other being an upper layer of DLC placed thereon, wherein the lower layer has a hardness no lower than 20 GPa and no higher than 45 GPa, a Young's modulus no lower than 250 GPa and no higher than 450 GPa, and a thickness no smaller than 0.2 μm and no larger than 4.0 μm, and the upper layer has a hardness no lower than 5 GPa and lower than 20 GPa, a Young's modulus no lower than 60 GPa and no higher than 240 GPa, and a thickness no smaller than 1.0 μm and no larger than 10 μm. The diamond-like carbon film has both good durability and low frictional coefficient.