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:
Dec. 21, 1993
Filed:
Apr. 03, 1992
Applicant:
Inventor:
Maximilian Stock, Azmoos, CH;
Assignee:
Hilti Aktiengesellschaft, Furstentum, LI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23B / ;
U.S. Cl.
CPC ...
408144 ; 407119 ; 408145 ;
Abstract
A tool bit for machining a hard material includes a carrier member (1) supporting polycrystalline diamond platelets (2) with the platelets including a hard metal base member (2a) and a diamond-type layer (2b) supported by the base body. At least the diamond-type layer (2b) is covered by a hard metal layer (3). The hard metal layer (3) serves a carbon diffusion block, whereby the tool bit can be used for machining ferroalloys. Without such a hard metal layer (3) chemical wear occurs due to carbon interaction.