# US 10,119,883 B2 · Evacuable flexible leakage test chamber

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- Number: US 10,119,883 B2
- Document ID: US10119883B2
- Status: Granted
- Kind: B2
- Application number: 15/126,470
- Filed: 2015-03-12
- Published: 2017-04-06
- Granted: 2018-11-06
- Earliest claimed: 2014-03-18
- Assignees: Inficon GmbH
- Applicants: INFICON GmbH
- Inventors: Hendrik van Triest; Silvio Decker
- Web page: https://patentgrep.com/patent/US10119883B2

## CPC

- G01M 3/3281: {removably mounted in a test cell}
- G01M 3/32: for containers, e.g. radiators
- G01M 3/3209: {Details, e.g. container closure devices}
- G01M: TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR

## Abstract

An evacuable flexible test chamber (10) for a leakage test of a test piece, having a wall (12) surrounding a test chamber volume (36), is characterized in that at least a portion of said wall is made up of two layers (18, 20) of wall material of which at least the layer (20) facing said test chamber volume (36) is made from a flexible material, and that between said two layers (18, 20) an overpressure as compared to the atmosphere surrounding said test chamber (10) is adapted to be created.

## Claims

### Claim 1

An evacuable flexible test chamber for a leakage test of a test piece, said test chamber comprising a wall surrounding a test chamber volume, wherein
at least a portion of said wall is made up of two layers of wall material of which at least a layer facing said test chamber volume is made from a flexible material, and between said two layers an overpressure as compared to the atmosphere surrounding said test chamber is adapted to be created,
the wall surrounding the test chamber volume is made up of two partial walls fittingly placed on each other, of which a first partial wall forms a bottom of the test chamber and a second partial wall forms a cover of the test chamber,
the layer facing away from the test chamber volume is of rigid configuration,
the layer of flexible material is permanently convexly bulged towards the test piece in an open condition of the chamber, and
between the two layers, the overpressure as compared to the atmosphere surrounding the test chamber prevails.

### Claim 2 (depends on 1)

The evacuable flexible test chamber according to claim 1, wherein the flexible material is a film.

### Claim 3 (depends on 1)

The evacuable flexible test chamber according to claim 1, wherein between the two layers, a gas, a liquid, a foam or a gel is contained.

### Claim 4 (depends on 1)

The evacuable flexible test chamber according to claim 1, wherein a pressure measuring instrument for measuring the pressure between the two layers is provided.

### Claim 5 (depends on 1)

The evacuable flexible test chamber according to claim 1, wherein the wall comprises a layer of a gas-conducting material on its side facing the test chamber volume.

### Claim 6 (depends on 1)

The evacuable flexible test chamber according to claim 1, wherein said overpressure is in the range of 80 mbar to 120 mbar.

### Claim 7 (depends on 1)

A method for a leakage test of a test piece located in a test chamber according to claim 1, wherein the overpressure between the layers is created before said chamber is closed.

### Claim 8 (depends on 7)

The method according to claim 7, wherein the tightness of the wall is checked by monitoring the pressure between the layers.

### Claim 9 (depends on 7)

The method according to claim 7, wherein a check as to whether a test piece is in the test chamber is performed by monitoring the pressure between the two layers when said test chamber is being closed.