Multiple walled chimney
AssigneeAmerican Metal Products Company
InventorJames W. Annestedt, Sr.
Life of this patent
Estimating the term…
Abstract
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.
Claims25
A double-walled chimney section for forming a chimney stack, said chimney section adapted to be joined with a similar chimney section, said chimney section comprising:
- an inner wall member and an outer wall member in concentric spaced-apart relationship, said outer wall member having a diameter greater than said inner wall member to form an annulus between said wall members;
- at least one spacer ring positionally captured within said annulus to maintain the concentric spaced apart relationship to said inner and outer wall members;
- and
- means for preventing longitudinal movement of said at least one spacer ring positionally captured within said annulus;
- said spacer ring formed of a continuous band having the ends thereof in overlapping contact and including a plurality of corrugated sections, each of said corrugated sections separated by a substantially planar segment engaging said inner wall and including an intermediate substantially planar segment a pair of outer segments formed perpendicular to said wall members, and a pair of connecting segments extending between said intermediate segment and said outer segments.
A triple-walled chimney section for forming a chimney stack, said chimney section adapted to be joined with a similar chimney section, said chimney section comprising:
- an inner wall member;
- an intermediate wall member in concentric spaced apart relationship to said inner wall member, said intermediate wall member having a diameter greater than said inner wall member to form a first annulus between said inner and intermediate wall members;
- an outer wall member in concentric spaced apart relationship to said intermediate wall member, said outer wall member having a diameter greater than said intermediate wall member to form a second annulus between said intermediate and outer wall members;
- at least one spacer ring positionally captured within each of said first and second annulus to maintain the concentric spaced apart relationship of said wall members;
- and
- means for preventing longitudinal movement of said spacer rings positionally captured within said first annulus and second annulus.
In a multiple walled chimney formed by joining multiple walled chimney sections in adjoining axial alignment, each of said multiple walled chimney sections having at least two wall members in concentric spaced apart relationship, the outer wall member having a diameter greater than the inner wall member to form an annulus therebetween, at least one spacer ring positionally captured between the wall members to maintain the concentric spaced apart relationship of the wall members, said at least one spacer ring comprising:
- a continuous band having the ends thereof joined in an overlapping seam, said band including a plurality of identical corrugations to maintain the spaced apart relationship of the wall members, each of said corrugations being separated from an adjacent corrugation by a planar segment which engages one of the wall members, said corrugations including an intermediate segment which engages the other of the wall members and forms the apex of said corrugation, a pair of outer side segments formed perpendicular to the wall members, and a pair of connecting segments extending between said intermediate segment and said side segments.
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.
Dependencies are inferred from the claim text.