초록 ▼

A metal chimney comprised of prefabricated double-walled sections packed with compressible mineral fiber insulation material between the inner and outer metal walls. Each section has a male end and a female end constructed so that a plurality of sections can be interconnected together end-to-end and

A metal chimney comprised of prefabricated double-walled sections packed with compressible mineral fiber insulation material between the inner and outer metal walls. Each section has a male end and a female end constructed so that a plurality of sections can be interconnected together end-to-end and will maintain structural integrity while also reducing heat conductivity and gas leakage from the inner wall to the outer wall. The female end of each section has a flexible, diaphragm like insulation retainer and seal, while the male end utilizes a rigid spider comprised of spaced apart spoke portions between inner and outer walls in combination with an annular wafer of thin nonmetallic sheet material. After installation, the flexible diaphragm seal is compressed against the rigid spider and annular wafer allowing the insulation to form a gas seal, which is maintained even if these wafers or diaphragm seals are consumed by chimney heat.

대표청구항 ▼

A prefabricated double-walled chimney section adapted to be connected to a similar section to form a chimney column, said section comprising: a cylindrical inner imperforate wall member; a cylindrical outer wall member having a greater diameter than and spaced radially outwardly from said inner wall

A prefabricated double-walled chimney section adapted to be connected to a similar section to form a chimney column, said section comprising: a cylindrical inner imperforate wall member; a cylindrical outer wall member having a greater diameter than and spaced radially outwardly from said inner wall member, thereby forming an annular cavity for a quantity of compressible fibrous insulation material between said inner and outer wall members; male coupling means at one end of said section including a plurality of relatively narrow and rigid structural members attached to and extending between end portions of said inner and outer wall members; female coupling means at the other end of said section including spaced apart end portions of said wall members for receiving said male coupling means, a flexible and partially movable annular retainer member of relatively low heat conducting material extending between said spaced apart end portions for holding said insulation in place between said inner and outer wall members, and means in said outer wall member for holding said retainer member against the end of the insulation material between said wall members.