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. 26, 2011
Filed:
Feb. 02, 2007
Yoshihiro Kuroda, Itami, JP;
Satoru Kukino, Itami, JP;
Tomohiro Fukaya, Itami, JP;
Sumitomo Electric Hardmetal Corp., Hyogo, JP;
Abstract
An object is to raise both the wear resistance and chipping resistance of diamond sintered compacts while taking advantage of the characteristics of highly chipping-resistant microfine-grain diamond sintered compacts. A sintered diamond layeris formed by sintering diamond grains and a binder on a cemented carbide substrate. This sintered diamond layercomprises a main diamond layerand a Co-rich diamond layerthat is present between the main diamond layerand the cemented carbide substrateand that has a Co content larger than that of the main diamond layer; the main diamond layer has a residual compressive stress of 1.5 GPa to 3 GPa.