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An expansion and length adjustment joint for use with a double walled metal chimney, the chimney having an inner flue wall and an outer casing wall, the adjustment joint having an inner sliding sleeve with a flange at one end thereof. An upper flue wall connecting band is sealingly disposed around t

An expansion and length adjustment joint for use with a double walled metal chimney, the chimney having an inner flue wall and an outer casing wall, the adjustment joint having an inner sliding sleeve with a flange at one end thereof. An upper flue wall connecting band is sealingly disposed around the inner sliding sleeve flange and a flange of the inner flue wall. A gasket retaining collar is secured against the inner sliding sleeve, thus retaining a flue gas seal therealong with thermal expansion.

대표청구항 ▼

An expansion and length adjustment joint for a metal chimney having an upper and lower chimney section, each of the chimney sections including an outer casing wall and an inner flue wall, the flue walls of the chimney sections having flanges at the ends thereof which extend radially outwardly, the e

An expansion and length adjustment joint for a metal chimney having an upper and lower chimney section, each of the chimney sections including an outer casing wall and an inner flue wall, the flue walls of the chimney sections having flanges at the ends thereof which extend radially outwardly, the expansion and length adjustment joint comprising: an inner sliding sleeve cylindrical in shape and having a radial flange at one end therearound, the radial flange of the inner sliding sleeve disposed adjacent to the radial flange of the upper flue wall, the inner sliding sleeve extending downwardly and received adjacent to the inner circumference of the lower flue wall; an upper flue wall connecting band circular in shape and disposed around the adjacent radial flanges of the inner sliding sleeve and the upper flue wall and securing the radial flanges together in a tight seal; a gasket retaining collar having an outwardly extending radial flange at one end therearound, the radial flange of the gasket retaining collar disposed adjacent the radial flange of the lower flue wall, the gasket retaining collar further including a groove therearound; a gasket adapted for receipt in the groove of the gasket retaining collar; a lower flue wall connecting band circular in shape and disposed around the adjacently disposed radial flange of the gasket retaining collar and the radial flange of the lower flue wall and securing the radial flanges together in a tight seal; and gasket compression means attached to the gasket retaining collar for compressing the gasket therein against the outer circumference of the inner sliding sleeve.