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:
Feb. 08, 1983
Filed:
Sep. 10, 1980
Applicant:
Inventor:
Eric F Drake, Pearland, TX (US);
Assignee:
Reed Rock Bit Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
175374 ; 175410 ; 51307 ;
Abstract
Cutting teeth for rolling cutter bits, including cutter inserts, cutter teeth formed in place, or formed separately and welded in place, etc., are formed by powder metallurgy as a densified powder metallurgical composite of at least two varying phases, said composite having a substantially continuous mechanical property gradient therethrough. One of said phases is preferably a refractory compound and another phase is a binder metal or alloy. The gradient is from one mixture of said phases in one region having hardness or wear resistant properties to another mixture of said phases in another region having toughness properties.