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. 29, 1983
Filed:
May. 13, 1981
Applicant:
Inventor:
Duane W Wallace, Houston, TX (US);
Assignee:
Reed Rock Bit Company, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21K / ; E21B / ;
U.S. Cl.
CPC ...
175365 ; 7610 / ; 7610 / ; 7610 / ; 175356 ;
Abstract
A method of making a rolling cutter drill bit involving the steps of forming a body member having an upper portion adapted to be threaded and passaging therein, forming at least one arcuate recess in the lower end of the body member, providing a lug assembly comprising a lug member having a bearing journal carrying a rolling cutter and an arcuate surface adapted to be received in the recess, and securing the lug assembly in the recess with the arcuate surface of the lug member in engagement with the arcuate recess. A drill bit made according to the foregoing method is also disclosed.