Patent
1980-10-03
1984-04-10
Yuen, Henry C.
98 66R, F24F 1308
Patent
active
RE0315494
ABSTRACT:
A unitary metal vent apparatus for securement to the roof of a building is formed from a single aluminum disk, into the form of a first flange portion, a tubular second portion, a cap-shaped third portion, and a vent hole portion disposed between the tubular portion and the cap portion. Preferably, the apparatus is produced by spinning a tubular protrusion in an aluminum disk, drilling vent holes, and collapsing the end of the tubular protrusion to form a cap-shaped portion.
REFERENCES:
patent: 2277982 (1942-03-01), Hosbein
patent: 2625094 (1953-01-01), Bonforte
patent: 3079853 (1963-03-01), Smith
patent: 3238862 (1966-03-01), Smith et al.
patent: 3311047 (1967-03-01), Smith
patent: 3421429 (1969-01-01), Stone
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patent: 3593478 (1971-07-01), Mason
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patent: 3783767 (1974-01-01), Stalker
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Marathon Bur Insulvent, Aluminum Insulation Breather, by Marathon Roofing Products Inc.
Marathon XL Platic Insulation Breather by Marathon Roofing Products, Inc.
Telemark VB Roof Vents, by Engineered Specialty Products, Inc.
Airexpeler Exhausters, p. 251 of Heating Ventilating Air Conditioning Guide 1960, (Th 7201-H6).
Ballard James W.
Ballard Larry R.
Bonnici Charles
Yuen Henry C.
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