US 5,630,940 AGranted

Filter device for the filtration of fluids

AssigneeMinnesota Mining and Manufacturing Company

InventorsLeonard M. Van Rossen, Bertus Dijkman

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Abstract

The filter device (10), provided for the filtration of fluids, comprises two interconnected material structures (14,16) forming a filter unit (12). The two material structures (14,16) are mechanically stable, at least one of the two material structures (14,16) being elastically deformable. The two material structures (14,16) are connected to each other at opposite connecting sites, with one (16) of the material structures forming an arch between the connecting sites. This arch has been generated by elastic deformation of the respective material structure (16) so that this material structure (16) is mechanically biased. A stretching movement of this material structure (16) is prevented by the connection of this material structure (16) to the other material structure (14) which in turn is of substantially plane configuration and is tensioned. Each thus constructed filter unit (12) offers high stability against the forces generated by the fluid flow so that a filter element (10) comprising such filter units can be inserted without additional constructions or elements which maintain the arched structure of the curved one material structure (16).

Claims19

Dependent claims

A filter device for the filtration of fluids, comprising at least one filter element comprising

at least one filter unit formed of a first material structure extending in a planer configuration and a second material structure which is curved in a substantially curved shape which first and second material structures are mechanically stable and connected to each other and of which at least the second material structure comprises a filter material,
wherein the second material structure is formed from a plastic, elastically deformed support structure curved in at least one substantially curved shape while being elastically deformed and attached to the support structure is a fibrous filter material having little or no resistance to bending, which second material structure is connected to said first material structure at two adjacent side edges of each curved shape, the side edges forming side flanges of said filter unit limiting each curved shape, wherein said support structure is elastically deformed and generates flexural restoring forces such that when the first and second material structures are connected, the substantially planar first material structure receives the flexural and restoring forces from the substantially curved second material structure thus subjecting the first material structure to tensile stress while the curved shape of the second material structure provides mechanical stability resisting deformation of the second material structure by fluid flow during filtration.

Dependencies are inferred from the claim text.

Facts

Application: 08/513,882Filed 30 Aug 1995
Priority: DE 43 10 664.11 Apr 1993
Granted: 20 May 1997
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

B01D 46/521
Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material: using folded, pleated material
B01D 46/0036
With additional separating or treating functions: by adsorption or absorption
B01D 46/12
Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces: in multiple arrangements
B01D 2275/10
Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours: multiple layers