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:
Nov. 01, 1988
Filed:
Aug. 10, 1987
Applicant:
Inventor:
Naresh J Kar, Westminster, CA (US);
Assignee:
Smith International, Inc., Newport Beach, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C21D / ;
U.S. Cl.
CPC ...
148 165 ; 148152 ; 148903 ; 148905 ;
Abstract
A cone blank for a rotary cone rock bit is forged, rough machined, carburized and heat-treated, followed by the formation of insert holes therein. Inserts are then pressed into the insert holes. The finished cone is subsequently sprayed with hardfacing cladding material in powdered form. The powder is thereafter densified and fused with a laser source to give a hard, erosion-resistant clad layer on the outer surface, including in the immediate vicinity of the inserts.