Liquid purification or separation – With alarm – indicator – register – recorder – signal or...
Patent
1998-06-02
2000-03-07
Drodge, Joseph W.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
210 91, 210100, 210469, 210482, 116264, 116284, 222 23, B01D 35143, B01D 1712, B01D 35027
Patent
active
060335572
ABSTRACT:
A filter use device is adapted for use with various types of containers, such as, liquid containers for water coolers in which the device includes a cap to be threaded onto an open end of the container, a filter cartridge in the cap which retains a conventional filter and a resilient pawl which is engageable with a disk having an indicator aligned with a slot in the cap and engageable with ratchet teeth to incrementally advance the indicator each time that the cap is threaded onto the end of the container; and when the indicator reaches the end of the slot is shifted to prevent any further advancement of the disk or passage of water through the filter or device and thereby signify the end of the life of the filter and the need for replacement of the filter. The number of rachet teeth may be varied in accordance with the number of containers with which the filter is to be used. In an alternate form, a resetting wrench is provided to return the pawl to its starting point for reuse with a replacement filter without discarding the entire cap.
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Gebhard Albert W.
Parker Robert M.
Drodge Joseph W.
Reilly John E.
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