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:
Jun. 06, 1989
Filed:
Dec. 14, 1987
Applicant:
Inventor:
Robert E Barrows, Fincastle, VA (US);
Assignee:
Ingersoll-Rand Company, Woodcliff Lake, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
175321 ; 175415 ; 279 / ; 279 99 ; 285 92 ;
Abstract
Disclosed is a means for retaining drill chucks for down hole drills including a circumferential groove cut in both the drill chuck and the wear sleeve, into which it is inserted, in complimentary mating orientation whereby the circumferential groove forms a channel which is filled with ball bearings, for example through access ports provided in the wear sleeve. The ball bearings prevent uncoupling and may be removed readily thereafter permitting removal of the chuck.