Stoves and furnaces – Liquid heater – Open-top vessel that may include lid
Patent
1989-01-05
1990-03-13
Jones, Larry
Stoves and furnaces
Liquid heater
Open-top vessel that may include lid
126350R, 220444, 220445, 220447, 220 67, 220 68, 220431, F24H 100, B65D 2518
Patent
active
049075691
ABSTRACT:
A hot water heater (40) has an inner storage tank (2), a lower skirt ring (42, 60, 74, 84, 110, 116) supporting and spacing the tank above a support surface (10a), and an outer jacket (46, 66, 80, 90, 98, 104, 122) around the inner storage tank and spaced outwardly therefrom to define an annular cavity space (22) therebetween. The skirt ring mates with the outer jacket and forms a dam sealing the annular space. Foamed insulation introduced as a liquid into the annular space hardens to form an annular insulation layer (13) around the inner storage tank. The dam prevents leakage of liquid therepast. Inwardly and outwardly extending skirt ring flanges (44, 62, 78, 88, 114, 120) are disclosed, together with various outer jacket constructions (46, 66, 80, 90, 98, 104, 122), including turned lower end flanges (52, 102, 108), and straight lower ends (68, 81, 92, 126).
REFERENCES:
patent: 3012958 (1961-12-01), Vixler
patent: 3253731 (1966-05-01), Fink et al.
patent: 3378162 (1968-04-01), Smith
patent: 4303190 (1981-12-01), Ditto et al.
patent: 4372028 (1983-02-01), Clark et al.
patent: 4447377 (1984-05-01), Denton
patent: 4477399 (1984-10-01), Tilton
patent: 4527543 (1985-07-01), Denton
patent: 4628184 (1986-12-01), West
patent: 4632792 (1986-12-01), Clark
patent: 4736509 (1988-04-01), Nelson
patent: 4744488 (1988-05-01), Nelson
patent: 4749532 (1988-06-01), Pfeffer
patent: 4790290 (1988-12-01), Chevalier et al.
A.O. Smith Corporation
Jones Larry
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