Expansion joint for prefabricated double-walled metal chimney

Details Expansion joint for prefabricated double-walled metal chimney Expansion joint for prefabricated double-walled metal chimney

1976-09-23

1977-06-14

Callaghan, Thomas F.

Pipe joints or couplings

With casing, lining or protector

Insulated

285133R, 285302, 285373, F16L 3900

Patent

active

040293432

ABSTRACT:
An expansion and length adjustment joint for a prefabricated double-walled metal chimney is disclosed. The joint provides for easy installation of the chimney at a job site without cutting of chimney sections. To prevent escape of flue gases, at least one gasket is positioned on one inner wall member for sliding engagement against the other inner wall member.

REFERENCES:
patent: 1824422 (1931-09-01), Badger
patent: 2850264 (1958-09-01), Grable
patent: 3208539 (1965-09-01), Henderson
patent: 3427051 (1969-02-01), White et al.
patent: 3544135 (1970-12-01), Hoerrner
patent: 3583730 (1971-06-01), Kozlowski
patent: 3902744 (1975-09-01), Stone

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