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:
Jun. 07, 1977
Filed:
Dec. 04, 1975
David H Kannapell, Prospect, KY (US);
American Air Filter Company, Inc., Louisville, KY (US);
Abstract
A damper assembly for high temperature or corrosive gases including a flow through housing with a damper blade disposed therein, the damper blade including a metallic plate member attached to a transversely extending support member which extends through openings in the side walls of the housing. The plate member includes means for receiving refractory thereon wherein the refractory substantially covers the plate member and is divided into a plurality of preselected sections, each section being separated by a material having a relatively low disintegrating temperature whereby upon initial heating of the damper assembly to temperatures higher than the disintegrating temperature of the relatively low disintegrating material, the said material disintegrates thereby leaving spacing in the refractory for expansion and contraction over a wide range of temperatures.