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:
Aug. 12, 1980
Filed:
Dec. 14, 1978
Applicant:
Inventor:
Hermann Bottenbruch, Dusseldorf, DE;
Assignee:
Karrena GmbH, Dusseldorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E04F / ; F23L / ;
U.S. Cl.
CPC ...
98 58 ; 52249 ; 110184 ;
Abstract
A chimney comprises an external shaft and an inner lining sub-divided into several portions arranged one above the other, each portion having an inner and an outer shell with an annular space containing compressed air therein at a higher pressure than the flue gas, each portion of the inner lining being carried by a support construction so as to be spaced from the external shaft.