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:
Dec. 21, 1976
Filed:
Aug. 28, 1975
Applicant:
Inventor:
Robert L Dixon, Brea, CA (US);
Assignee:
Smith International, Inc., Newport Beach, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16C / ;
U.S. Cl.
CPC ...
308-82 ; 175337 ;
Abstract
A drill bit construction of the rotary cutter type in which cutter journals extend downwardly from the bit body and toward each other at an angle, the provision of bearing sleeves removably mounted on the journals and rotary cutters removably and rotatably mounted on the bearing sleeves, permitting the replacement of the bearing sleeves or the customary roller or ballbearings and also permitting replacement of the rotary cutter itself if the latter has become worn or damaged.