Electric resistance heating devices – Heating devices – Tank or container type liquid heater
Reexamination Certificate
2000-12-04
2001-11-20
Walberg, Teresa (Department: 3742)
Electric resistance heating devices
Heating devices
Tank or container type liquid heater
C392S441000, C392S445000
Reexamination Certificate
active
06321036
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a water heater, and more particularly to an electric water heater can immediately provide hot water unlimited hot water.
2. Description of Related Art
Electric water heaters are widely used to heat water for baths, washing clothes, cooking and so on. There are two types of conventional electric water heaters. One has a tank to store heated water, and the other one only has heating elements to heat the water. The water heater with tank can keep the water at a desired high temperature and provide hot water to a user immediately. However, this type of water heater needs a large space in which to locate the tank. Making a space for the hot water tank can be a major inconvenience. In addition, it is needs a huge amount of electrical power to heat the cold water that flows into the tank when the hot water is depleted.
Although the other type of water heater does not need the space for a tank, this type of the conventional water heater cannot provide hot water immediately. A period of time is needed to heat the water. In addition, the temperature of the water heated by the conventional water heater is unstable, especially in a place where the water pressure is unstable. This makes use of this type of the conventional water heater also inconvenient.
To overcome the shortcomings, the present invention tends to provide an improved electric water heater to mitigate or obviate the aforementioned problems.
SUMMARY OF THE INVENTION
The main objective of the invention is to provide an improved electric water heater that can immediately provide unlimited hot water. The water heater has a base, a tank mounted on the base, a partition wall mounted in the tank and at least one electric heating element. The partition wall divides the tank into a heating chamber and a reservoir. At least one heating element extends into the heating chamber. A cool-water supply pipe extends into the heating chamber to supply cool water to the tank when a user uses the hot water stored in the reservoir. This can immediately provide unlimitedly hot water at a desired high temperature to a user. In addition, the space for locating the tank can be reduced.
Other objects, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
REFERENCES:
patent: 3962560 (1976-06-01), Braathen
patent: 4514617 (1985-04-01), Amit
patent: 4637347 (1987-01-01), Troy
Campbell Thor
Huang Chao-Lin
Kolisch Hartwell Dickinson & McCormack & Heuser
Walberg Teresa
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