Prefabricated chimney-shaft

Details Prefabricated chimney-shaft Prefabricated chimney-shaft

1978-09-25

1981-10-13

Arola, Dave

Pipe joints or couplings

For branched path

T-type

285424, 285183, F16L 3900

Patent

active

042944740

ABSTRACT:
A prefabricated chimney-shaft constructed from an outer sheath surrounding an inner sheath, in which the end portions of the inner and the outer sheaths are interconnected by perpendicularly positioned tie members having bent-over rims joining the sheaths, such that at one end the rims project a longitudinal distance out of the outer sheath, and at the other end the tie member and rims are recessed a longitudinal distance from the end of the outer sheath.

REFERENCES:
patent: 601542 (1898-03-01), Barnes
patent: 2091608 (1937-08-01), Ostendorf
patent: 2851288 (1958-09-01), Kinkead
patent: 3226135 (1965-12-01), Epstein
patent: 3872780 (1975-03-01), Zonias

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