Method of making a foam insulated water heater
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United States of America Patent
Stats
-
Jun 11, 1991
Issued Date -
N/A
app pub date -
Oct 3, 1989
filing date -
Jun 11, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of insulating a water heater with an expandable foam insulating material is provided. The expandable foam insulating material has an initial viscosity of<300 cps, a flow index.gtoreq.about 0.7, a gel index.gtoreq.about 0.8 and generates a maximum pressure of.ltoreq.about 1.0 psig. The foam is injected into the annular space between the water tank and the outer jacket. Preferably, the foam is injected into a sleeve, which acts to confine the foam during its most liquid state, positioned within this space. The foam is preferably injected into the annular space between the tank and the jacket while the top cover is removed. In this way, the injected foam can be distributed more evenly around the circumference of the tank.
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Family
International Classification(s)
Cited Art Landscape
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