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:
Oct. 16, 2001
Filed:
Apr. 21, 1999
Katsuhito Yoshida, Hyogo, JP;
Yasunobu Ogata, Hyogo, JP;
Junichi Shiraishi, Hyogo, JP;
Tetsuo Nakai, Hyogo, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A polycrystal diamond tool is provided whose heat resistance, strength and anti-adhesion property are improved by modifying the porosity of a diamond sintered compact and which comprises a diamond sintered compact, sintered under ultra-high pressure and high temperature, brazed onto a tool substrate, in which the cutting edge vicinity part consists of 85 to 99 volume % of the diamond sintered compact material consisting of diamond grains bonded with each other and the balance of pores, and the other part than the cutting edge vicinity part consists of diamond grains and the balance of a brazing material.