With Cooling Patents (Class 137/310)
  • Patent number: 4027654
    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.
    Type: Grant
    Filed: December 4, 1975
    Date of Patent: June 7, 1977
    Assignee: American Air Filter Company, Inc.
    Inventor: David H. Kannapell