Electric resistance heating devices – Heating devices – Tank or container type liquid heater
Patent
1993-03-19
1996-11-12
Paschall, Mark H.
Electric resistance heating devices
Heating devices
Tank or container type liquid heater
392453, 392457, F24H 120
Patent
active
055748228
ABSTRACT:
A water heater including a steel water tank having a bottom plate and a deep drawn body portion welded together, the tank having a glass lining and openings to receive and discharge water; foam insulation surrounding the body portion; an outer covering surrounding the foam insulation; a bottom pan connected to the outer covering adjacent the bottom plate; and a heater connected to the tank. Also disclosed is a method of making a water heater including forming a steel water tank by welding together a bottom plate and a deep drawn body portion; lining the formed steel water tank with a glass coating; placing foam insulation forming liquids into a substantially rigid outer covering to form foam insulation having an interior portion with an open end and sized and shaped to substantially match the shape of the body portion of the water tank; positioning the water tank into the interior portion of the foam insulation; and covering the bottom plate of the water tank with a bottom pan and connecting the bottom pan to the outer covering.
REFERENCES:
patent: 2237808 (1941-04-01), Berg
patent: 3143636 (1964-08-01), Lupovici
patent: 4866250 (1989-09-01), Pasbrig
patent: 4969420 (1990-11-01), McKeon
patent: 5081696 (1992-01-01), Beck
patent: 5175414 (1992-12-01), Hara et al.
patent: 5251282 (1993-10-01), Hanning et al.
patent: 5313876 (1994-05-01), Hilger et al.
Bradford White Corporation
Miller Austin R.
Paschall Mark H.
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