# US 2008/0184685 A1 · Frame and cassette filter

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- Number: US 2008/0184685 A1
- Document ID: US20080184685A1
- Status: Published application
- Kind: A1
- Application number: 12/024,747
- Filed: 2008-02-01
- Published: 2008-08-07
- Earliest claimed: 2007-02-02
- Assignees: Carl Freudenberg KG
- Inventors: Jurgen Kempf; Rainer Kaffenberger
- Web page: https://patentgrep.com/patent/US20080184685A1

## CPC

- B01D 46/0005: {Mounting of filtering elements within casings, housings or frames (B01D46/2422 takes precedence)}
- B01D 46/0013: {Modules}
- B01D 2265/025: making use of ramps or cams
- B01D 2265/028: Snap, latch or clip connecting means
- 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

With respect to the task of creating a frame for holding a filter element, the frame being easy to install following the inexpensive production thereof, a frame for receiving a filter element, comprising four wall elements (1, 2), which rest against one another on installation edges (3, 4) and form a peripheral wall (5), is characterized in that two wall elements (1, 2), respectively, are configured identically. Furthermore a cassette filter is provided.

## Claims

### Claim 1

A frame for receiving a filter element, comprising four wall elements, which rest against one another on installation edges and form a peripheral wall, characterized in that two wall elements, respectively, are configured identically.

### Claim 2 (depends on 1)

The frame according to claim 1, characterized in that on the installation edges means for fixing and connecting the wall elements, are configured.

### Claim 3 (depends on 1)

The frame according to claim 1, characterized in that on the installation edges, means for latching the wall elements, are configured.

### Claim 4 (depends on 2)

The frame according to claim 2, characterized in that two wall elements, respectively, comprise detent lugs, and two wall elements, respectively, comprise holders for the detent lugs.

### Claim 5 (depends on 1)

A frame according to claim 1, characterized in that insertion tapers are provided on the wall elements.

### Claim 6 (depends on 1)

A frame according to claim 1, characterized in that reinforcing ribs are associated with the wall elements.

### Claim 7 (depends on 1)

A frame according to claim 1, characterized in that installation handles are disposed on at least two wall elements.

### Claim 8 (depends on 1)

A frame according to claim 1, characterized in that retaining bars are provided on at least two wall elements.

### Claim 9 (depends on 1)

A frame according to claim 1, characterized in that the wall elements comprise strips protruding from the wall.

### Claim 10 (depends on 9)

The frame according to claim 9, characterized in that the strips have a U-profile, are hollow, and comprise concave stabilizing bars.

### Claim 11 (depends on 9)

The frame according to claim 9, characterized in that the strips form a head frame.

### Claim 12 (depends on 1)

A frame according to claim 1, characterized in that the wall elements are configured as injection-molded parts.

### Claim 13 (depends on 1)

A cassette filter, comprising a frame according to claim 1 and a filter element held by the frame.