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. 09, 1993
Filed:
Jan. 09, 1990
Applicant:
Inventors:
Assignee:
Paul Wurth S.A., Luxembourg, LU;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
266271 ; 269234 ; 2692 / ; 254 / ;
Abstract
A method for opening the taphole of a shaft furnace by withdrawing a rod, held in the hardened sealing compound of the taphole, includes engaging a coupling device onto the end of the rod, gripping the rod using a clamp longitudinally displaceable by a hydraulic jack, pulling out the rod by a length corresponding to the stroke of the jack and repeating this operation until the rod is completely withdrawn from the taphole.
Metz, Jean. (1993). Device for opening the taphole of a shaft furnace (U.S. Patent No. 5192489). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5192489
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile