Method of making water heater construction

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

1987-01-29

1988-04-12

Moon, Charlie T.

Metal working

Method of mechanical manufacture

Assembling or joining

29455R, 29460, 126375, 126376, 220444, 220452, 220469, 264 469, B23P 1102

Patent

active

047365099

ABSTRACT:
A method of making the water heater construction includes the steps of locating a sleeve of insulation material around the exterior wall surface of the inner tank extending from proximate the bottom end of the inner tank and extending upwardly longitudinally thereof a predetermined distance less than the full length of the inner tank, folding the top end of the insulation sleeve back over itself to form an annular cuff at the top end of the sleeve, and positioning the outer shell concentrically over the inner tank whereupon the annular cuff is compressed between the interior wall surface of the outer shell and exterior wall surface of the inner tank. The annular space above the annular cuff of the sleeve is then filled with an expandable foam insulation material which is allowed to foam in situ.

REFERENCES:
patent: 3921273 (1975-11-01), Kondo et al.
patent: 4104783 (1978-08-01), Schultz et al.
patent: 4372028 (1983-02-01), Clark et al.
patent: 4384905 (1983-05-01), Gros
patent: 4413392 (1983-11-01), Otani et al.
patent: 4447377 (1984-05-01), Denton
patent: 4477399 (1984-10-01), Tilton

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