Electric resistance heating devices – Heating devices – Tank or container type liquid heater
Reexamination Certificate
2005-01-25
2005-01-25
Campbell, Thor (Department: 3742)
Electric resistance heating devices
Heating devices
Tank or container type liquid heater
C392S441000
Reexamination Certificate
active
06847782
ABSTRACT:
Hot water dispersing systems having a self-resetting heater control switch that prevents heater burn-up if the water tank becomes empty, and a variable volume expansion chamber having a flexible bladder that is designed to withstand a pressure of at least 300 pounds per square inch.
REFERENCES:
patent: 4263498 (1981-04-01), Meyers
patent: 5778679 (1998-07-01), Celorier et al.
Anaheim Manufacturing Company
Float Kenneth W.
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