Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Fluid pressure responsive
Reexamination Certificate
1997-03-06
2001-04-17
Drodge, Joseph W. (Department: 1723)
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Fluid pressure responsive
C137S487500, C137S488000, C210S106000, C210S110000, C210S120000, C210S243000
Reexamination Certificate
active
06217753
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Technical Field of the Invention
This invention generally relates to a water purifier, and more particularly, to a water purifier for a beverage dispenser or other beverage serving apparatus.
2. Description of the Prior Art
In general, a beverage dispenser is connected to a faucet of a water pipe so as to conduct treated water suitable for drining, for example, a chlorinated water, from the water pipe through a pipe member and to the beverage dispenser.
Since it is demanded that the water which will be conducted into the beverage dispenser be clear and harmless, it is required to remove detrimental substances, such as for example, trihalomethane (CHX
3
) and offensive odor substances, such as for example, 2-MIB, and minute particles, such as for example, Fe system substances coming off from an inner wall of the water pipe, from the water which will be conducted into the beverage dispenser. Accordingly, it is preferable to dispose a water purifier within the pipe member which links the faucet of the water pipe to the beverage dispenser.
However, conventional water purifiers may allow water to flow from the beverage dispenser to the water pipe. Therefore, pollutants, such as for example, the germs which are unexpectedly propagated at the beverage dispenser, may be unintentionally conducted to the water pipe through the pipe member together with the water when it is allowed to erroneously flow from the beverage dispenser to the water pipe.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a water purifier which can completely prohibit water from flowing therethrough at a time when the water may attempt to erroneously flow backwardly through the water purifier.
According to the present invention, an apparatus for processing water includes a conduit having a first end and a second end opposite to the first end, and a water processing mechanism, such as a water purifying device. The water purifying device is disposed in the conduit between the first and second ends thereof.
The first end of the conduit is arranged to conduct an object water to be processed into the conduit. The second end of the conduit is arranged to conduct the water processed at the water purifying device to a location outside of the apparatus.
The water processing apparatus further comprises a prohibiting mechanism for prohibiting a flow of the water through the conduit at a time when the water may attempt to flow through the conduit from the second end to the first end.
The prohibiting mechanism comprises a detector, such as a pressure detector, for detecting whether the processed water is required to be conducted to the location outside of the apparatus through the second end of the conduit and a regulating device, such as an electromagnetic valve, for regulating the conducting of the object water into the conduit through the first end thereof in response to a detecting result from the pressure detector.
The regulating device is arranged such that it operates to close the first end of the conduit at a time when the pressure detector detects that the processed water is not required to be conducted to the location outside of the apparatus through the second end of the conduit.
BRIEF DESCRIPTION OF THE DRAWINGS
The novel features of the present invention are set out with particularity in the appended claims, but the invention will be understood more fully and clearly from the following detailed description of the invention as set forth in the accompanying drawings.
The single drawing is a block diagram of a water purifier in accordance with one embodiment of the present invention.
REFERENCES:
patent: 662632 (1900-11-01), Vail
patent: 3730885 (1973-05-01), Makrides et al.
patent: 4801375 (1989-01-01), Padilla
patent: 5254243 (1993-10-01), Carr et al.
patent: 5494573 (1996-02-01), Schoenmeyr et al.
patent: 2659869 (1991-09-01), None
patent: 2-90988 (1990-03-01), None
patent: 2-207883 (1990-08-01), None
Chiku Toshiya
Takigawa Satoshi
Banner & Witcoff , Ltd.
Drodge Joseph W.
Sanden Corporation
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