# US 5,707,518 A · Refrigerator water filter

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,707,518 A
- Document ID: US5707518A
- Status: Granted
- Kind: A
- Application number: 08/587,635
- Filed: 1996-01-17
- Granted: 1998-01-13
- Earliest claimed: 1996-01-17
- Assignees: White Consolidated Industries, Inc.
- Inventors: Donald A. Coates; Robert C. Russell; Kenneth E. Morris; Walton E. Sparks; Rickie L. Gunderson
- Web page: https://patentgrep.com/patent/US5707518A

## CPC

- F25D 23/126: {Water cooler}
- B01D 35/153: Anti-leakage or anti-return valves
- B01D 35/30: Filter housing constructions
- B01D 35/31: including arrangements for environmental protection, e.g. pressure resisting features
- B01D 29/15: arranged for inward flow filtration
- B01D 2201/301: Details of removable closures, lids, caps, filter heads
- F25D 2323/121: the refrigerator is characterised by a water filter for the water/ice dispenser
- F25D 2400/06: Refrigerators with a vertical mullion
- F25D: REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR (refrigerated showcases A47F3/04; thermally-insulated vessels for domestic use A47J41/00; refrigerated vehicles, see the appropriate subclasses of classes B60 - B64; containers with thermal insulation in general B65D81/38; heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants, or materials for the production of heat or cold by chemical reactions other than by combustion C09K5/00; thermally-insulated vessels for liquefied or solidified gases F17C; air-conditioning or air-humidification F24F; refrigeration machines, plants, or systems F25B; cooling of instruments or comparable apparatus without refrigeration G12B)
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)

## Abstract

A water filter assembly mounted to an inner surface of a refrigerator and accessible from within a refrigeration compartment of the refrigerator. The filter assembly includes a first housing part, a second housing part, and a replaceable filter cartridge. The first and second housing parts cooperate to define a fluid-tight chamber for receipt of the filter cartridge. The first housing part includes an inlet port through which unfiltered water may be introduced into the chamber and an outlet port through which filtered water may exit the chamber. The second housing part surrounds a portion of the first housing part and provides a volume sufficient to hold the filter cartridge and any water within the chamber when the second housing part is released from the first housing part to replace the filter cartridge, and thereby prevents or minimizes spillage of water from the filter assembly during filter cartridge replacement. A shield member is disposed within the refrigeration compartment and cooperates with a cabinet wall to define a filter compartment which surrounds the filter assembly. A heater disposed within the filter compartment adjacent the filter assembly and is operable to heat the filter assembly to prevent freezing of water contained therein.

## Claims

### Claim 1

A water filter assembly for a refrigerator, said assembly being positioned within a refrigeration compartment of the refrigerator and comprising a filter housing and a replaceable filter cartridge, said filter housing including a first housing part and a second housing part, said first and second housing parts being releasably secured to one another in a fluid tight manner and cooperating to define a chamber for receipt of said filter cartridge, wherein said first housing part integrally includes a mounting bracket to facilitate securing of the filter assembly to an internal surface of the refrigerator and includes an inlet through which unfiltered water may enter the chamber and an outlet through which filtered water may exit the chamber, said second housing part being bowl-shaped and including a wall which is radially spaced from said first housing part and radially surrounds a portion of said first housing part.

### Claim 2 (depends on 1)

A water filter assembly according to claim 1, wherein said second housing part is bowl shaped and has an available volume sufficient to contain all of the water within said chamber to thereby minimize spillage when said second housing part is removed from said first housing part.

### Claim 3

A water filter assembly for a refrigerator, said assembly comprising a filter housing and a replaceable filter cartridge, said filter housing including a first housing part and a second housing part which cooperate to define a chamber for receipt of said filter cartridge, wherein said first housing part includes an inlet through which unfiltered water may enter the chamber and an outlet through which filtered water may exit the chamber, wherein said second housing part has a bowl-shaped bottom portion from which a generally cylindrical wall upwardly extends, said cylindrical wall including a first portion and a second portion, said first portion being located at a bottom of said cylindrical wall and including a threaded inner surface which threadably engages a threaded outer surface of said first housing part to secure said first and second housing parts together, said threaded inner surface being generally adjacent a junction of said cylindrical wall and said bowl-shaped bottom portion, said second portion of said cylindrical wall having a relatively smooth inner surface and extending upwardly from said first portion.

### Claim 4 (depends on 3)

A water filter assembly according to claim 3, wherein said first and second housing parts are releasably secured to one another in a fluid tight manner.

### Claim 5 (depends on 4)

A water filter assembly according to claim 4, wherein said second housing part radially surrounds a portion of said first housing part.

### Claim 6 (depends on 5)

A water filter assembly according to claim 5, wherein said second housing part is bowl-shaped, and includes a wall which surrounds said first housing part.

### Claim 7 (depends on 6)

A water filter assembly according to claim 6, wherein said bowl shaped second housing part has an available volume sufficient to contain all of the water within said chamber to thereby minimize spillage when said second housing part is removed from said first housing part.

### Claim 8 (depends on 3)

A water filter assembly according to claim 3, wherein said first housing part is adapted to be secured to an internal surface of the refrigerator.

### Claim 9 (depends on 8)

A water filter assembly according to claim 8, wherein said first housing part integrally includes a mounting bracket to facilitate securing the filter assembly to an internal surface of the refrigerator.

### Claim 10 (depends on 3)

A water filter assembly according to claim 3, wherein said second housing part cylindrical wall radially surrounds a portion of said first housing part.

### Claim 11 (depends on 3)

A water filter assembly according to claim 3, wherein said first and second housing parts are releasably secured to one another in a fluid tight manner.

### Claim 12 (depends on 3)

A water filter assembly according to claim 3, wherein said first housing part integrally includes a mounting bracket to facilitate securing of the filter assembly to an internal surface of the refrigerator.

### Claim 13 (depends on 3)

A water filter assembly according to claim 3, wherein said bowl shaped second housing part has an available volume sufficient to contain all of the water within said chamber to thereby minimize spillage when said second housing part is removed from said first housing part.