Liquid purification or separation – Recirculation – Serially connected distinct treating or storage units
Reexamination Certificate
2000-07-17
2002-01-29
Lithgow, Thomas M. (Department: 1724)
Liquid purification or separation
Recirculation
Serially connected distinct treating or storage units
C210S195200, C210S257200, C210S266000, C210S416300
Reexamination Certificate
active
06342155
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an apparatus for making fluoridated and sterilized drinking water.
2. Description of the Related Art
FIG. 1
illustrates a conventional apparatus
10
for making drinking water. The apparatus
10
includes a pre-treating filter
11
for removing large particles from the water, a pump
16
connected to an outlet of the pre-treating filter
11
for transporting the water to downstream thereof, an active carbon filter
12
connected to the pump
16
for removing colorants and for deodorizing the water, a fine filtration filter
13
connected to an outlet of the active carbon filter
12
for removing fine particles from the water, a reverse osmosis filter
14
connected to an outlet of the fine filtration filter
13
for removing ultra fine particles, heavy metals, and germs from the water so as to make the water drinkable, and a storage tank
15
connected to an outlet of the reverse osmosis filter
14
for storing the drinking water.
The aforesaid apparatus
10
is disadvantageous in that the apparatus
10
can not provide fluoridated drinking water. Moreover, since the active carbon in the active carbon filter
12
can react with oxygen in the water that passes therethrough, the oxygen level in the water is reduced considerably, thereby adversely affecting the quality of the drinking water. Furthermore, the quality of the water in the storage tank
15
tends to worsen when the apparatus
10
is inactive for a long period of time due to a rapid growth of germs in the storage tank
15
.
SUMMARY OF THE INVENTION
Therefore, the object of the present invention is to provide an apparatus for making fluoridated and sterilized drinking water that is capable of overcoming the aforementioned problems.
According to the present invention, an apparatus for making fluoridated and sterilized drinking water comprises: a housing; a filter assembly mounted inside the housing and having a downstream end; a water storage tank mounted inside the housing and including an inlet connected to and in fluid communication with the downstream end of the filter assembly, and an outlet; a circulating unit disposed inside the housing and having a first end connected to and in fluid communication with the outlet of the water storage tank, and a second end connected to and in fluid communication with the water storage tank for returning water to the water storage tank; a UV sterilizing unit connected to the circulating unit between the first and second ends and adapted to sterilize the water flowing through the circulating unit; a fluoridating unit connected to the circulating unit between the first and second ends and adapted to add fluorine to the water flowing through the circulating unit; and a water supply part connected to the circulating unit between the first and second ends and downstream of the UV sterilizing unit and the fluoridating unit and adapted to supply the sterilized and fluoridated drinking water.
REFERENCES:
patent: 4969991 (1990-11-01), Valadez
patent: 5108590 (1992-04-01), Disanto
patent: 5582717 (1996-12-01), Disanto
patent: 5817231 (1998-10-01), Souza
patent: 5873996 (1999-02-01), Rozelle et al.
Kintech Technology Co., Ltd.
Ladas and Parry
Lithgow Thomas M.
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