Device for detecting leaks in flexible articles
AssigneeLeybold-Heraeus GmbH
InventorJoachim Marx
Life of this patent
Estimating the term…
Abstract
A device adapted to detecting leaks in an article having readily deformable walls has conventional arrangements for performing a leak detection by overpressure or by vacuum and has a deformable backup wall for engagement with the walls of the article. The backup wall is, on its face oriented towards the article, so configured that between the backup wall and the article there is obtained a coherent fluidtight space which may be evacuated.
Claims19
A device for detecting leaks in an article which includes a readily deformable wall having opposite inner and outer sides;
- the improvement comprising:
- a. a flexible backup wall having opposite inner and outer sides and being arranged for positioning inside an article;
- b. closure means secured to said backup wall for defining, together with said outer side of said backup wall and the inner side of an article wall, a coherent space;
- c. means for generating a pressure difference between the pressures in said coherent space and at said inner side of said backup wall for causing said backup wall to deform and to engage, with its outer side, the inner side of the article wall for supporting the article wall while maintaining the coherence of said space;
- d. means for generating a pressure difference between the pressures in said coherent space and at the outer side of the article wall for causing test gas to penetrate into said coherent space through any leak in the article wall;
- and
- e. detector means communicating with said coherent space for sensing test gas therein.
A device for detecting leaks in an article which essentially consists of a readily deformable signle planar wall having opposite first and second sides;
- the improvement comprising:
- a. a flexible backup wall having opposite first and second sides and a generally planar course;
- b. closure means secured to said backup wall for defining, together with said first side of said backup wall and the first side of the article wall, a coherent space;
- said closure means including a flange member for engaging perimetrical portions of the article wall;
- c. means for generating a pressure difference between the pressures in said coherent space and at said second side of said backup wall for causing said backup wall to deform and to engage with said first side the first side of the article wall for supporting the article wall while maintaining the coherence of said space;
- d. means for generating a pressure difference between the pressures in said coherent space and at the second side of the article wall for causing test gas to penetrate into said coherent space through any leak in the article wall;
- e. detector means communicating with said coherent space for sensing test gas therein;
- and
- f. a coupling nipple for maintaining communication between said coherent space and said detector means.
A device for detecting leaks in an article which includes a readily deformable wall having opposite first and second sides;
- the improvement comprising:
- a. a flexible backup wall having opposite first and second sides;
- b. a plurality of spaced article-engaging means provided on said first side of said backup wall;
- c. closure means secured to said backup wall for defining, together with said first side of said backup wall and the first side of an article wall, a coherent space;
- d. means for generating a pressure difference between the pressures in said coherent space and at said second side of said backup wall for causing said backup wall to deform and to contact, with said article-engaging means, the first side of the article wall for supporting the article wall at a plurality of predetermined spaced locations while maintaining the coherence of said space;
- e. means for generating a pressure difference between the pressures in said coherent space and at the second side of the article wall for causing test gas to penetrate into said coherent space through any leak in the article wall;
- and
- f. detector means communicating with said coherent space for sensing test gas therein.
A device for detecting leaks in an article which includes a readily deformable wall, comprising:
- a. means for generating a pressure difference between the pressures at opposite sides of the article wall for causing test gas to pass from the relatively high pressure side to the relatively low pressure side through any leak in the article wall;
- b. detector means for sensing test gas at said relatively low pressure side;
- c. a flexible backup wall for engaging the article wall;
- and
- d. a plurality of spaced article-engaging means carried by that side of said flexible backup wall which is oriented towards the article for maintaining at all times a coherent space between said backup wall and the article.
Dependencies are inferred from the claim text.