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US 4,283,283 AGranted
Water filter
AssigneeBon Aqua, Inc.
InventorGeorge M. Zimmerman
Life of this patent
Estimating the term…
Abstract
A water filter including a cup into which water may be filled, and a replaceable filter cartridge removably receivable within the lower portion of the cup, with the cartridge including a hollow body having top and bottom openings across which first and second sheets of filter material extend, and with a mass of activated carbon being contained within a chamber in the body of the replaceable cartridge and confined between the two sheets of filter material.
Claims9
A water filter comprising:
- a cup having a top opening through which water may be filled into the cup, and having a bottom outlet through which filtered water discharges;
- and
- a replaceable filter cartridge removably received within a lower portion of said cup and through which the water flows to said outlet;
- said replaceable cartridge including a hollow body adapted to be removably placed in said lower portion of the cup and containing a chamber and a top opening through which water flows downwardly into the chamber and a bottom opening through which water discharges from the chamber toward said outlet;
- said replaceable cartridge including a first sheet of filter material extending across said top opening of the cartridge body and peripherally sealed to the body about said top opening, a second sheet of filter material extending across said bottom opening of the cartridge body and peripherally sealed to the body about said bottom opening, and a mass of activated carbon contained within said chamber between said first and second sheets of filter material and retained in the chamber by said sheets;
- said lower portion of the cup having a cylindrical vertically extending side wall, an annular bottom wall extending inwardly at the lower end of said side wall and containing said outlet at its center, and an annular essentially horizontal flange extending horizontally outwardly from and about the upper end of said side wall and connected peripherally to an upper portion of said cup;
- said body of the replaceable cartridge having a vertical cylindrical side wall extending about said chamber and having an outer surface of greater diameter than the internal diameter of said side wall of the lower portion of the cup to be forced fit therein frictionally retaining the cartridge in the cup while permitting it to be forced therefrom for replacement;
- said body of the cartridge having an annular bottom wall extending horizontally inwardly from the lower extremity of said side wall of the cartridge body and containing said bottom opening, said second sheet of filter material being received at the upper side of said bottom wall of the cartridge body and being peripherally fusion sealed thereto;
- said body of the cartridge having an annular horizontal flange extending outwardly from and about the upper extremity of said side wall of the cartridge body and fusion sealed to the periphery of said first sheet of filter material;
- said bottom opening of the cartridge body and said second sheet of filter material being smaller than said upper opening of the cartridge body and said first sheet of filter material, and being larger than said bottom outlet of the cup.
7 more elements
A water filter comprising:
- a cup having a top opening through which water may be filled into the cup, and having a bottom outlet through which filtered water discharges;
- and
- a replaceable filter cartridge removably received within a lower portion of said cup and through which the water flows to said outlet;
- said lower portion of the cup having a side wall extending thereabout;
- said cup having a generally horizontal wall extending outwardly from and about an upper end of said side wall;
- said replaceable cartridge including a hollow body which is adapted to be removably placed in said lower portion of the cup and containing a chamber and which has a top opening through which water flows downwardly into the chamber and a bottom opening through which water discharges from the chamber toward said outlet;
- said replaceable cartridge including a first sheet of filter material extending across said top opening of the cartridge body and peripherally sealed to the body about said top opening, a second sheet of filter material extending across said bottom opening of the cartridge body and peripherally sealed to the body about said bottom opening, and a mass of activated carbon contained within said chamber between said first and second sheets of filter material and retained in the chamber by said sheets;
- said body of the cartridge having a side wall which is a close fit within said side wall of the lower portion of the cup in a relation preventing flow of water downwardly therebetween to require that water flowing to said outlet pass through said filter sheets and said activated carbon;
- said body of the cartridge having a peripheral flange extending generally horizontally outwardly from the upper end of said side wall of the cartridge body and received above said generally horizontal wall of the cup;
- said cup having an upper portion containing and defining an upper water receiving compartment above the top of said cartridge and above the top of said flange and having a side wall extending about said compartment and projecting upwardly higher than the flange from the periphery of said generally horizontal wall of the cup;
- said upper compartment within the upper portion of the cup above said cartridge and said flange being larger in horizontal and vertical dimension and in volume than said lower portion of the cup which contains said cartridge.
8 more elements
Dependencies are inferred from the claim text.