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:
Mar. 02, 1982
Filed:
Oct. 20, 1980
Jean-Michel Boudeau, Le Fayet, FR;
Michel Logue, Sainte-Foy-les-Lyon, FR;
Claude Parisot, Le Fayet, FR;
Abstract
A nippled joint utilizes a biconical threaded nipple, for joining the ends of graphite electrodes. This new joint involves a particular machining of the threads of each end of the nipple or of the two electrode seats into which the nipple is screwed, which allows a variable clearance to be produced along the threading, this clearance passing through a minimum value into a zone located between a tenth and a quarter of the height of the engaged threading, measured from the base of each seat. A stop system which is produced by shifting at least one thread of the nipple or of the corresponding electrode seat, allows the clearance to be distributed on both sides of the joining plane of the two electrodes. The joint finds great utility in the assembly of electrode columns in an arc furnace and allows them to endure extremely severe thermomechanical strains without breaking.