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:
May. 27, 1986
Filed:
Aug. 22, 1984
Applicant:
Inventor:
Michael S Oliver, Lafayette, LA (US);
Assignee:
Smith International, Inc., Newport Beach, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ; E21B / ;
U.S. Cl.
CPC ...
175227 ; 175337 ; 175374 ;
Abstract
This invention discloses a method to protect the lubrication reservoir system for sealed bearing rotary cone rock bits. A multiplicity of flush-type tungsten carbide inserts are positioned in each leg of the rock bit surrounding the lubrication reservoir cover cap. The inserts prevent erosion of the leg around the cover cap, thus protecting the snap ring that secures the cover cap within the reservoir chamber.