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:
Dec. 13, 1994
Filed:
Aug. 23, 1993
Applicant:
Inventors:
Alfred Henn, Rodenbach, DE;
Michael Schafer, Altenstadt, DE;
Assignee:
Leybold Aktiengesellschaft, Hanau, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22D / ;
U.S. Cl.
CPC ...
266236 ; 222602 ; 266272 ;
Abstract
An apparatus for opening and closing a bottom tap opening in a vacuum induction melting and casting furnace with a movable closing body, a plug rod for example, and a drive unit for the displacement of the closing body, the closing body being made of ceramic material and connected by levers to a coupling element, which has a compression spring to limit the maximum closing force of the closing body, and is displaceable by an electric motor drive.