Method of making a water heater construction

Details Method of making a water heater construction Method of making a water heater construction

1992-05-05

1993-05-11

Eley, Timothy V.

Metal working

Method of mechanical manufacture

Assembling or joining

264 465, B29C 6722, B23P 1904

Patent

active

052089649

ABSTRACT:
A water heater construction and method includes arranging the inner water tank and the surrounding outer shell in an inverted orientation and positioning the outer shell into a cover which is arranged with clearance openings for the plumbing connections extending from the top of the tank to extend therethrough. With the tank, shell and cover in an inverted and assembled condition, the annular clearance space defined between the tank and shell is filled, at least the majority, with liquid, foam-in-place insulation. By inverting the water heater and injecting liquid foam insulation material, the clearance space above the inner water tank is foamed first thereby assuring that the foam material at this location will have greater uniformity in foam density and cell structure than at the lower portion of the annular space so as to provide enhanced thermal efficiency at the most critical location.

REFERENCES:
patent: 3793411 (1974-02-01), Stonitsch 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: 4586227 (1986-05-01), Cornell
patent: 4628184 (1986-12-01), West
patent: 4736509 (1988-04-01), Nelson
patent: 4744488 (1988-05-01), Nelson
patent: 4749532 (1988-06-01), Pfeffer
patent: 4828325 (1989-05-01), Brooks

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