Filter cartridge assembly for water treatment device
AssigneePUR Water Purification Products, Inc.
InventorsJohn D. Tanner, David J. Emmons, Erik G. Orwoll
Life of this patent
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Abstract
A filter cartridge end-of-life mechanism and a filter cartridge assembly for a water treatment device. The end-of-life mechanism comprises a float which is moved along an escapement path each time the device is filled. A counting mechanism connected to the float provides a continuous visual indication of the amount of useful life remaining in the filter cartridge. The cartridge assembly includes a tray detachably connected to a filter cartridge. The tray is positioned beneath the outlet end of the cartridge to remove water treatment particles from the treated water.
Claims19
A filter cartridge end-of-life mechanism for a gravity-fed water treatment device, comprising:
- a float which rises when the water treatment device is filled, and falls after the water has been treated;
- and
- means for counting the number of times the water treatment device has been filled, including an escapement mechanism wherein said float is advanced along an escapement path each time said float rises and falls.
A filter cartridge end-of-life mechanism for a gravity-fed water treatment device, comprising:
- means for counting the number of times the water treatment device has been filled, including a member moved by the water;
- and
- means, in cooperation with said fill-counting means, for providing a continuous visual indication of the amount of useful life remaining in the filter cartridge.
A filter cartridge assembly for a water treatment device, comprising:
- a filter cartridge containing water treatment material and having an upper inlet end and a lower outlet end;
- and
- a tray positioned beneath said outlet end, detachably connected to said filter cartridge and separable from the water treatment device, said tray being constructed and arranged such that treated water flowing from said outlet end flows generally toward said inlet end and out of said tray, and said tray including a notch extending upwardly from a bottom of said tray to reduce the surface tension of the treated water on an underside of said bottom.
Dependencies are inferred from the claim text.