# US 7,607,548 B2 · Closure cap, especially for closing the connection of an oil filter

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- Number: US 7,607,548 B2
- Document ID: US7607548B2
- Status: Granted
- Kind: B2
- Application number: 10/514,340
- Filed: 2003-05-13
- Published: 2006-04-27
- Granted: 2009-10-27
- Earliest claimed: 2002-05-13
- Inventors: Josef Dagn
- Web page: https://patentgrep.com/patent/US7607548B2

## CPC

- F01M 11/03: Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means (filters B01D)
- B65D 2251/08: Closures specially adapted for closing container mouths of differing size or configuration, e.g. screw/snap combination
- F01M: LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES

## Abstract

The invention relates to a closure cap, especially for closing a screw neck of an oil filter connection in motor vehicles. An elastically expandable nut element (5,20) is arranged in the closure cap. Said nut element is such that it can be placed on screw necks (3) of various diameters, engaging with the outer thread of the screw neck.

## Claims

### Claim 1

Closure cap, especially for closing the screw neck of an oil filter connection in motor vehicles, wherein in the closure cap an elastically expandable nut element is arranged, which is suitable for being mounted on screw necks of different diameter, such that the nut element engages with the outer thread of a screw neck, wherein the nut element is designed in the form of a two- or multi-arm spring clip formed from a strip of resilient material which is positioned in a rotation-proof way in the closure cap and has spring arms for engagement in the thread of a screw neck, wherein on free ends of the spring arms, a portion is bent inwards for forming an inclined surface, to which a horizontal portion is connected whose free edge is inclined relative to the longitudinal axis for engagement with the thread of a screw neck.

### Claim 2 (depends on 1)

Closure cap according to claim 1, wherein a flange portion provided with a ring seal is provided with prestress in the axial direction, wherein the flange portion comes to bear on the surface surrounding the screw neck.

### Claim 3 (depends on 2)

Closure cap according to claim 2, wherein the flange portion is formed conically and is elastically deformable.

### Claim 4 (depends on 1)

Closure cap according to claim 1, wherein a flange portion is provided which comes to bear on the surface surrounding the screw neck and has a ring seal.

### Claim 5 (depends on 1)

Closure cap according to claim 1, wherein the spring arms are positioned inward from the inner surface of the cap to form an air gap between the spring arms and the inner surface of the cap to allow radial motion depending on the diameter of the screw neck when engaging the thread of the screw neck.