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Water Filter Patent
 

Orally operable water filter

An orally operable water filter includes an outer covering formed of a flexible, water impervious material and which defines an elongate enclosure. A flexible microporous filter membrane, having a pore size of not more than one micron, is disposed within the elongate enclosure and divides the enclosure into respective fluid inlet and fluid outlet compartments, such that the outlet may be placed in the mouth of the user and the fluid inlet may be contacted with a source of water to be filtered by drawing the water through the filter using oral suction. Furthermore, the filter includes a flexible separator, disposed at least in the outlet compartment, for preventing the blocking of fluid over the surface of the filter membrane.

Water filter unit and dispenser

A replaceable water filter unit which can be used with a water pitcher, water bottle, or other such water dispensing device utilizes activated charcoal particles which are sandwiched between a pair of pads which may be fabricated of polyester felt batting material. The pads and charcoal particles sandwiched therebetween are installed in a frusto-conical housing with the pads in tight abutment against the side walls of the housing. The opposite end walls of the housing are apertured and each of the pads is installed directly opposite one of these end wall portions. The housing is removably installed in the outlet portion of the water dispensing device such that the water passes through the pads and the charcoal particles when being dispensed.

Home water filter

A water filter apparatus is provided, which is especially useful in filtering out chemicals from tap water. The filter includes upper and lower vessels and a filter assembly between them which includes activated charcoal for adsorbing chemicals. The filter assembly includes a filter housing with inlet holes near the bottom of the upper vessel and a filter vent near the top of the upper vessel for releasing gas produced during filtering through the activated charcoal. A ring-shaped preliminary filter lies around the inlet holes, to avoid blocking the upward passage of gas through the vent. The filter extends partially through the holes, to lie closely along the path of upwardly-flowing gas bubbles, so the bubbles tend to drag along gas forming at the inside of the preliminary filter. A cap assembly on the upper vessel permits the escape of vented gas while avoiding splashing. The container is preferably placed in a refrigerator during filtering, to aid in adsorption of chemicals.

Household water filter system

A portable water filter for household use is disclosed, comprising a pair of releasably connected, upper and lower sections. A water faucet is connected by a line having a severe flow restriction to the lower section for discharge into the bottom thereof. The two sections are connected by a threaded collar having an integral wall separating the two sections with aperture means at its center for upward flow of water from the lower to the upper section. Each section contains two filtering materials, one of which in each section is a plurality of nested, cup-shaped, paper filter elements sealed by a mating ring to the interior surface of the respective section. The walls of the sections are transparent to permit viewing of the filter materials, thereby visually indicating the need for filter replacement by the degree of discoloration thereof.


Water filter having a filter use time indicator
Water filter with strainer scraping means
Orally operable water filter
Hinge down refrigerator water filter

PAT. NO. Title
101 4767544 Orally operable water filter
102 4764274 Water filter unit and dispenser
103 4749484 Home water filter
104 4740296 Household water filter system
105 4714546 Potable water filter
106 4686037 Water filter apparatus
107 4674538 Device for regulating water flow in a water filter
108 4666601 Water filter
109 4605499 Water filter
110 4545905 Filter backwash water saver and water filter to clean swimming pool filter
111 4529518 Industrial water filter with stationary screen
112 4515692 Water filter
113 4504389 Water filter
114 4448695 Effluent water filter device and method
115 4362618 Water filter
116 4301009 Water filter
117 4287067 Water filter for radiators
118 4283283 Water filter
119 4267042 Water filter, in particular for aquarium water
120 4206055 Household water filter
121 4151092 Portable water filter
122 4025438 Water filter device
123 4013562 Portable water filter
124 3935106 Water filter assembly

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