Pipe joints or couplings – With casing – lining or protector – Insulated
Patent
1980-04-07
1984-04-10
Arola, Dave W.
Pipe joints or couplings
With casing, lining or protector
Insulated
285158, 285325, 285406, F16L 3726, E04H 722
Patent
active
044414030
ABSTRACT:
An aeration fan mounting system having a wall adapter and a fan housing with aligned interior surfaces and held in end-to-end alignment with each other by support bracket assemblies having insertion rings extending outwardly from both the wall adapter and fan housing and also having brackets for holding the insertion rings adjacent each other.
REFERENCES:
patent: 348556 (1886-09-01), Grueninger
patent: 958043 (1910-05-01), Stockley
patent: 3941409 (1976-03-01), Rameau
patent: 4037527 (1977-07-01), Steffen
Arola Dave W.
Sturges Hiram A.
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