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:
Apr. 21, 1992
Filed:
Jul. 06, 1990
Andrew I Lloyd, Parkhurst, Johannesburg, Transvaal, ZA;
Other;
Abstract
A method of producing an abrasive body which consists of an abrasive compact sandwiched between layers of cemented carbide. The method includes the steps of providing an unbonded structure comprising a layer of ultra-hard abrasive particles sandwiched between two carbide layers. Each carbide layer is a layer of cemented carbide or a layer containing the components necessary to produce cemented carbide. The two carbide layers and the sandwiched layer each contain a binder metal selected from cobalt, nickel, iron and the like. The concentration of binder metal in the sandwiched layer is less than the concentration of the binder metal in one of the carbide layers, and is higher than the concentration in the binder metal in the other carbide layer. The unbonded structure is subjected to conditions of elevated temperature suitable to produce the abrasive body.