|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||285/1331 ; 285/367 ; 285/373 ; 285/419|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 25 인용 특허 : 5|
A multiple walled metal chimney formed of a plurality of axially joined chimney sections each of which utilizes positionally captured spacer rings. Joint clamps are used to connect the chimney sections for formation of the complete chimney conduit. The spacer rings are positionally captured between annular shoulders formed in the inner and outer walls of the chimney sections to eliminate welding of the rings. The rings may include an expansion joint to allow circumferential expansion and contraction of the ring with the walls.
A multiple walled metal chimney comprising: at least two chimney sections having a cylindrical inner wall member with a radially extending flange at each end, a cylindrical outer wall member in concentric spaced-apart relationship to said inner wall member, said outer wall member having a diameter greater than said inner wall member to form an annulus between said wall m embers, and a pair of corrugated spacer rings positionally captured within said annulus between said wall members proximate the ends of said chimney section, said wall members including ...