Electric resistance heating devices – Heating devices – Tank or container type liquid heater
Reexamination Certificate
1999-08-12
2001-06-05
Walberg, Teresa (Department: 3742)
Electric resistance heating devices
Heating devices
Tank or container type liquid heater
C392S447000, C392S475000
Reexamination Certificate
active
06243535
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention has for its object a steam generator and more particularly a steam generator for domestic apparatus such as irons or steam cleaners for example.
Conventionally, steam generators for domestic apparatus comprise a hermetically sealed receptacle, provided with a water inlet and a steam outlet as well as a safety valve, in which is disposed a heating body. These steam generators have drawbacks particularly due to the fact that the heating body in contact with water becomes covered with scale and is difficult to descale and that it is necessary to provide sealed passages through the wall of the receptacle to supply electricity to the heating body.
SUMMARY OF THE INVENTION
The present invention has for its object a steam generator adapted to overcome the mentioned drawbacks.
The object of the present invention is the provision at low cost of a reliable, durable, easily descalable steam generator of high quality particularly as to its lifetime and its possibilities of adjusting the power delivered to the heating body. Another object of the present invention is to prevent the heating body from being in contact with water contained in the sealed receptacle.
The present steam generator is distinguished by the characteristics recited herein.
REFERENCES:
patent: 4414037 (1983-11-01), Friedheim
patent: 5367607 (1994-11-01), Hufnagel et al.
patent: 5835680 (1998-11-01), Glucksman et al.
patent: 5881207 (1999-03-01), DeBourg et al.
patent: 11 17 228 (1961-11-01), None
patent: 32 23 193 (1983-12-01), None
patent: 44 43 798 (1996-03-01), None
patent: 0 238 955 (1987-09-01), None
Campbell Thor
Ecovap S.A.
Walberg Teresa
Young & Thompson
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