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:
May. 11, 1993
Filed:
Oct. 07, 1991
Noriyuki Nishio, Sendai, JP;
Nihon Cement Co. Ltd., Tokyo, JP;
Nihon Ceratec Co. Ltd., Sendai, JP;
Abstract
A diamond tool which generates little vibrations, can be used in high temperature environments and can be produced with excellent yield has at least a shank portion (2) in contact with a diamond chip (1) and formed from a reaction-sintered silicon carbide material having a thermal expansion coefficient close to that of the diamond chip by using a diamond granule, and a method for producing the diamond tool which comprises contacting a diamond chip with an ingredient layer mixed with a diamond granule and a carbonaceous source, placing a metallic silicon powder on the surface of the layer, and then reaction-sintering it in vacuum or in a non-oxidizing atmosphere by heating, thereby forming a reaction-sintered silicon carbide material having a coefficient of thermal expansion close to that of a diamond chip, at least, in the shank portion at which a diamond chip is in contact.