# US 8,784,656 B2 · Preliminary filter for a fuel delivery unit

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- Number: US 8,784,656 B2
- Document ID: US8784656B2
- Status: Granted
- Kind: B2
- Application number: 12/668,288
- Filed: 2008-06-06
- Published: 2010-07-22
- Granted: 2014-07-22
- Earliest claimed: 2007-07-10
- Assignees: Continental Automotive GmbH
- Applicants: Holger Wehner
- Inventors: Holger Wehner
- Web page: https://patentgrep.com/patent/US8784656B2

## CPC

- F02M 37/50: Filters arranged in or on fuel tanks
- B01D 35/027: rigidly mounted in or on tanks or reservoirs (B01D35/04 takes precedence)
- B01D 35/0273: {Filtering elements with a horizontal or inclined rotation or symmetry axis submerged in tanks or reservoirs}
- F02M 37/10: submerged in fuel, e.g. in reservoir
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- 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 preliminary filter for a fuel delivery unit of a motor vehicle, with a filter fabric which is tensioned by a supporting edge. The supporting edge is manufactured integrally with a connecting piece for connection to the fuel delivery unit and with transverse webs and supporting ribs. The preliminary filter has few components to be assembled and can be manufactured particularly cost-effectively.

## Claims

### Claim 1

A prefilter for a fuel delivery unit comprising:
a connection piece configured to couple the prefilter to the fuel delivery unit;
at least one web;
a frame, integrally formed with the connection piece, the at least one web configured to connect the frame and the connection piece;
a filter fabric, the frame configured to support the filter fabric, a portion of the filter fabric being sealingly fastened to the frame, wherein the frame is adapted to be selectively connected to the filter fabric;
at least one support rib extending along the height of the frame from the connection piece to a portion of the filter fabric located distal to the connection piece; and
at least two transverse webs, each connecting one side of the frame to an opposite side of the frame.

### Claim 2 (depends on 1)

The prefilter as claimed in claim 1, wherein the frame has at least one support margin, the at least one support margin having a face abutting the filter fabric, the face of the support margin being fastened to the filter fabric.

### Claim 3 (depends on 2)

The prefilter as claimed in claim 2, wherein the support margin is configured to tension the filter fabric.

### Claim 4 (depends on 1)

The prefilter as claimed in claim 1, wherein the frame is configured as a closed frame.

### Claim 5 (depends on 1)

The prefilter as claimed in one of claims 1, wherein
the connection piece is arranged parallel to a height axis of the frame and arranged on a first longitudinal face of the frame, and
the at least two transverse webs are adapted to support the filter fabric on a side of the frame opposite the connection piece.

### Claim 6 (depends on 1)

The prefilter as claimed in claim 1, wherein the at least one transverse web is arranged offset with respect to the connection piece.

### Claim 7 (depends on 2)

The prefilter as claimed in claim 2, the at least one support rib comprising a plurality of support ribs configured to support the filter fabric.

### Claim 8 (depends on 1)

The prefilter as claimed in claim 1, wherein the connection piece comprises a flange for sealing connection to the filter fabric.

### Claim 9 (depends on 1)

The prefilter as claimed in claim 1, wherein the frame is manufactured from plastic.

### Claim 10 (depends on 9)

The prefilter as claimed in claim 9, wherein the frame is manufactured by injection molding.

### Claim 11 (depends on 1)

The prefilter as claimed in claim 1, wherein the frame has two end faces, and separate portions of the filter fabric are sealingly fastened to each of the two end faces.

### Claim 12 (depends on 2)

The prefilter as claimed in claim 2, wherein the support margin has two end faces, and separate portions of the filter fabric are sealingly fastened to each of the two end faces.