초록 ▼

A filter for a conventional water jug having a valved tap near the bottom of its cylindrical side wall comprises a pan-like case member that seats in the bottom of the jug and has a filter cartridge removably sealed across its open top. An aperture in the axially short cylindrical side wall of the c

A filter for a conventional water jug having a valved tap near the bottom of its cylindrical side wall comprises a pan-like case member that seats in the bottom of the jug and has a filter cartridge removably sealed across its open top. An aperture in the axially short cylindrical side wall of the case member communicates its interior with the inwardly projecting tubular tap inlet. A radially projecting tubular collar on the case member cooperates with an O-ring to provide a seal between the interior of the case member and the tap inlet. A tacky, water-insoluble adhesive area on the underside of the bottom wall of the case member secures it to the bottom wall of a jug. The filter cartridge can comprise blow molded shell halves, filter paper discs, and activated charcoal confined between the discs.

대표청구항 ▼

A filter unit for installation in a water jug of the type having a side wall, a substantially flat bottom wall, a top opening through which the jug can be filled and which can be closed by a cover, and a valved outlet tap extending through said side wall at a level near said bottom wall, said tap de

A filter unit for installation in a water jug of the type having a side wall, a substantially flat bottom wall, a top opening through which the jug can be filled and which can be closed by a cover, and a valved outlet tap extending through said side wall at a level near said bottom wall, said tap defining an inwardly facing annular shoulder at the interior of said side wall and having an axially short tubular inlet portion that is concentrically surrounded by said shoulder and projects beyond the same into the interior of the jug, said filter unit comprising: A. a pan-like case member having (1) a substantially flat bottom case wall adapted to overlie said bottom wall of the jug, (2) a side case wall projecting up from said bottom case wall, said side case wall (a) having a top rim extending therearound that lies in a single plane and (b) having an aperture therethrough at one side of said case member, and (3) a tubular collar portion projecting radially outwardly from the side case wall and sealed thereto around said aperture, said collar portion having a diameter to surround said tubular inlet portion of the tap and to have its outer end sealed to said shoulder; B. tacky, water-insoluble adhesive means on the bottom of said bottom case wall, spaced from said one side of the case member, whereby the case member is secureable to the bottom wall of a jug; and C. an axially short filter cartridge of a width to be closely receivable within said side case wall and having opposite top and bottom end surfaces through which water to be filtered can flow successively, said filter cartridge having a radially outwardly projecting circumferential flange extending therearound which is spaced above its bottom end surface and which sealingly engages said top rim all around the same and supports the cartridge with its bottom end surface spaced above said bottom case wall.