F - Mech Eng,Light,Heat,Weapons – 24 – D
Patent
F - Mech Eng,Light,Heat,Weapons
24
D
122/84
F24D 17/00 (2006.01)
Patent
CA 1151480
ABSTRACT The specification describes a water heater which comprises a tank, a jacket surrounding the tank and spaced therefrom so as to provide an insulating space. The jacket includes a cylindrical jacket member and a cover member on the top of the jacket member to close off the top of the insulating space. The heater further comprises an insulating wall mounted in the insulating space which includes an envelope member in the form of an elongated relatively thin tube. The envelope member has an inner tubular wall, an outer tubular wall spaced from the inner tubular wall and the space between the inner and outer tubular walls is enclosed at the lower ends by a bottom wall. The inner and outer tubular walls are interconnected longitudinally by opposing end wall edges. The space between the inner and outer tubular walls is opened at the top. The insulating wall further includes a one-piece cylindrical wall of insulating material which has been foamed-in-place inside the envelope member. The insulating wall member is comprised of a closed cell rigid polyurethane foam material having gas captured in the closed cells thereof. The specification also describes a method of insulating a water tank.
363690
Macrae & Co.
State Industries Inc.
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