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:
Feb. 05, 1991
Filed:
Dec. 22, 1988
Applicant:
Inventor:
Benoit Amaudric du Chaffaut, Versailles, FR;
Assignee:
Institut Francais du Petrol, Rueil Malmaison, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
175325 ; 175 83 ; 166237 ;
Abstract
A centering device for an assembly, particularly for drilling, having at least one centering device relative to which the assembly rotates. A driving arrangement is provided for rotationally driving the centering device, with the driving arrangement including a friction clutch in the form of, for example, a disk clutch, cone clutch, or drum clutch.
Amaudric du Chaffaut, Benoit. (1991). Centering device that can be engaged or disengaged, specifically for a (U.S. Patent No. 4989679). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4989679
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile