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:
Mar. 30, 1993
Filed:
Jun. 17, 1991
Applicant:
Inventor:
William M Jordan, Abingdon, VA (US);
Assignee:
GTE Valenite Corporation, Troy, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
175432 ; 761082 ; 228189 ;
Abstract
A U-shaped sheet metal brazing shim for disposition within a groove in a drill bit body to encircle the edge area of a plate-type cutting insert. Brazing alloy is provided to form bonds between the shim and opposed surfaces on the cutting insert and drill bit body. Closely spaced holes extend across essentially the entire surface of the metal sheet to provide thermal stress relief within the brazed joint. Border areas of the sheet are left unperforated so that edges of the sheet are relatively smooth and free of sharp projections that could cut into a person's hand while the shim is being handled or repositioned.