초록 ▼

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

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.

대표청구항 ▼

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 g

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 annular shoulders extending into said annulus to prevent longitudinal movement of said spacer rings, said shoulders engaging said spacer rings; said spacer rings including a plurality of corrugations and overlapping ends which form an expansible seam, said corrugations separated by planar segments which engage said inner wall member and include a pair of side wall segments extending perpendicular to said wall members, an intermediate segment which engages said outer wall member, and a pair of connecting segments formed at an angle to said intermediate segments and extending between said intermediate segment and said side wall segments; an inner clamp means extending around adjoining end flanges of adjacent chimney sections to joint one chimney section with another chimney section in axial alignment, said clamp means including means for securing said inner clamp means; and an outer clamp means extending around said outer wall members of adjacent chimney sections for closing the gap between adjacent outer wall members, said outer clamp means including flanges which are received in annular grooves formed in said outer wall members to facilitate attachment of said outer clamp means, said annular grooves corresponding to said annular shoulders of said outer wall members.