Water treatment vessels and cartridges therefor
First Claim
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1. A water treatment vessel comprising:
- a water treatment cartridge;
an elapsed time indicator; and
denominating means, separate from the indicator, for denominating a portion of the indicator corresponding to a desired elapsed time so as to allow a user to see when the indicator indicates the desired elapsed time.
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Abstract
A water treatment vessel is adapted for receiving, in use, an elapsed time indicator. The vessel comprises denominating means, for denominating a portion of the indicator corresponding to a desired elapsed time, so as to allow a user to see when the indicator indicates the desired elapsed time. The denominating means may comprise one or more windows such that only a selected portion of the indicator is visible. The vessel is arranged to activate the indicator automatically when it is installed.
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Citations
22 Claims
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1. A water treatment vessel comprising:
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a water treatment cartridge;
an elapsed time indicator; and
denominating means, separate from the indicator, for denominating a portion of the indicator corresponding to a desired elapsed time so as to allow a user to see when the indicator indicates the desired elapsed time. - View Dependent Claims (3, 4, 5, 7, 9, 13, 17, 18, 19, 20)
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2. A water treatment vessel, comprising:
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an elapsed time indicator; and
means for denominating a portion of the indicator corresponding to a desired elapsed time, so as to allow a user to see when the indicator indicates the desired elapsed time. - View Dependent Claims (6, 8, 10, 11, 12, 14, 15, 16)
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- 21. A water treatment cartridge having an elapsed time indicator comprising a first reservoir containing a colored indicator fluid and a migration medium, arranged such that said fluid is initially isolated from said migration medium, but on the application of pressure to the reservoir said fluid is brought into contact with the migration medium such that the fluid is caused to migrate along the migration medium, the extent of said migration giving an indication of elapsed time since activation.
Specification