Connection joint for prefabricated metal chimney

Details Connection joint for prefabricated metal chimney Connection joint for prefabricated metal chimney

1976-09-23

1977-06-14

Callaghan, Thomas F.

Pipe joints or couplings

With casing, lining or protector

Insulated

138148, 285133R, 285373, F16L 3900

Patent

active

040293440

ABSTRACT:
A prefabricated metal chimney formed of double wall sections which can be connected so that the inner pipe joints are substantially air or smoke tight. The inner pipes of adjacent sections have end flanges which engage and are held together by an inner band member. Attached near each opposite end of the outer wall member for each section is a spacer band with circumferentially spaced apart tab means. Inter tab means extend radially outwardly from the band and is fixed to the outer pipe wall while inner tab means is held to the inner pipe by the inner band member.

REFERENCES:
patent: 2362557 (1944-11-01), Jahns
patent: 2679867 (1954-06-01), Epstein
patent: 2894537 (1959-07-01), Carr
patent: 3226135 (1965-12-01), Epstein
patent: 3889715 (1975-06-01), Lilja et al.
patent: 3902744 (1975-09-01), Stone

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