Filter element and method for the production thereof
First Claim
Patent Images
1. A filter element, comprising:
- a filter cylinder having a filter mat web arranged in a series of folds adjacent to one another at least in individual areas thereof, each of said folds having two radial members extending radially inwardly and connected by a crown on radial outward fold ends, said filter mat web having two web ends extending a height of said filter mat web and connected to one another at a junction point forming said filter mat web into an annular element, two of said folds being adjacent to said junction point and on opposite sides thereof;
a fluid permeable support tube surrounding said filter cylinder; and
a retaining device with retaining elements overlapping said two of said folds on outer surfaces of said radial members thereof remote from said junction point;
whereby, when fluid to be filtered flows through said filter element from an interior thereof to an exterior thereof, said retaining device resists bulging of said two of said folds and separation of said web ends of said filter mat web.
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Abstract
A filter element includes a filter cylinder whose outer side rests against a fluid-permeable supporting tube (15). The inside (3) of the filter cylinder can be flown through by the fluid to be filtered. The filter cylinder is formed by a filter mat web. The filter mat web has a series of folds (9) that rest against one another at least in areas. Both ends of the filter mat web are joined to one another at a junction (5) to form an annular body (1). The filter element includes a device that acts upon the junction (5) to prevent, in the area of the junction (5), a bulging of the folds (9) caused by the flow of the fluid.
12 Citations
10 Claims
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1. A filter element, comprising:
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a filter cylinder having a filter mat web arranged in a series of folds adjacent to one another at least in individual areas thereof, each of said folds having two radial members extending radially inwardly and connected by a crown on radial outward fold ends, said filter mat web having two web ends extending a height of said filter mat web and connected to one another at a junction point forming said filter mat web into an annular element, two of said folds being adjacent to said junction point and on opposite sides thereof; a fluid permeable support tube surrounding said filter cylinder; and a retaining device with retaining elements overlapping said two of said folds on outer surfaces of said radial members thereof remote from said junction point; whereby, when fluid to be filtered flows through said filter element from an interior thereof to an exterior thereof, said retaining device resists bulging of said two of said folds and separation of said web ends of said filter mat web. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification