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:
Jul. 30, 1985
Filed:
Oct. 25, 1983
Applicant:
Inventor:
Werner Kleine, Achim-Uesen, DE;
Assignee:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
175384 ; 175262 ;
Abstract
An improved boring tool comprising a longitudinal groove in its shaft and a two-armed tool within the groove is provided for boring an enlargement within a hole. The two-armed tool has a rear actuating arm and a forward cutting arm and is tiltably supported in the groove for tilting between an ineffective position, in which its actuating arm extends out of the groove for cooperating with the edge of the outer end of the hole, and effective positions in which the cutting arm reaches out of the groove for cutting the enlargement into the wall of the hole when the edge of the open end of the hole forces the actuating arm into the groove.