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:
Apr. 07, 1981
Filed:
Aug. 20, 1979
Applicant:
Inventors:
Gary M Crase, Cypress, CA (US);
Kurt M Trzeciak, Irvine, CA (US);
Assignee:
Smith International, Inc., Newport Beach, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F16C / ;
U.S. Cl.
CPC ...
308-82 ; 175371 ; 308174 ; 308230 ;
Abstract
A bearing assembly, for a drive shaft connected to an in-hole motor rotor to drive a bit and a housing connected to the motor stator has sets of oppositely acting thrust bearings having corresponding members of bearings and parts at opposite sides of a thrust member on the shaft. Plural sets of thrust bearings are shown between spaced radial bearings to optimize load distribution.