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:
Jan. 23, 2007
Filed:
Nov. 26, 2002
Hans-josef Giertz, Ratingen, DE;
Klaus Dieter Ruthemann, Gelsenkirchen, DE;
Jürgen George, Bochum, DE;
Franz Liesewitz, Mülheim a.d.Ruhr, DE;
Horst Schröder, Dortmund, DE;
Friedrich Wilhelm Cyris, Duisburg, DE;
Hans-Josef Giertz, Ratingen, DE;
Klaus Dieter Ruthemann, Gelsenkirchen, DE;
Jürgen George, Bochum, DE;
Franz Liesewitz, Mülheim a.d.Ruhr, DE;
Horst Schröder, Dortmund, DE;
Friedrich Wilhelm Cyris, Duisburg, DE;
Deutsche Montan Technologie GmbH, Essen, DE;
Abstract
A coke-oven door has an annular periphery normally juxtaposed with an annular door frame. A seal assembly for the door has at least two flexible, relatively displaceable, metallic, and annular membranes each having an annular inner periphery and an annular outer periphery and a U-section channel fixed to the outer periphery of only one of the membranes, open toward the door, and having annular inner and outer edges. The other membrane bears on the one membrane and therethrough on the channel. A mount secures the inner peripheries of the membranes to the periphery of the door. A spring urges the edges of the channel with a spring force against the door frame.