US 5,509,950 AGranted

Filter device for the filtration of gases and/or fluids

AssigneeMinnesota Mining and Manufacturing Company

InventorsPeter van de Graaf, Jos Valkenburg

Life of this patent

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Abstract

The filter device (10) has a filter element (12) including a filter medium (20) arranged in zig-zag shaped pleats. On its two longitudinal sides extending in the pleating direction (36), the filter medium (20) is provided with stabilizing strips (34) bonded thereto for stabilizing the zig-zag-shaped pleated configuration of the filter medium (20). During use of the filter device (10), the filter element (12) is arranged within a filter element holding frame (14) which is inserted in a holding members, e.g. in the air inlet shaft (18) of an air conditioning system. Due to a certain inherent stability of shape of the filter medium (20) and the stabilizing strips (34), the filter element (12) is sufficiently firm and has a self-supporting construction. The filter element (12) is easy to handle and can be inserted into the filter element holding frame (14) in a simple manner. Except for the actual filter medium (20), the filter element (12) requires little extra material, i.e., for the stabilizing strips (34), in order to ensure stability of the device. Thus, when replacing the filter element (12), the quantity of waste material to be disposed of in addition to the filter medium (20) is extremely small.

Claims13

Dependent claims

A filter device for the filtration of gases and fluids comprising:

a filter element having two longitudinal sides and two transverse sides comprising a filter medium, pleated in a zig-zag manner in a pleating direction, and two thermoplastic stabilizing strips, wherein said filter medium, on said two longitudinal sides extending in the pleating direction, is provided with said stabilizing strips for stabilizing the zig-zag shaped pleated configuration of the filter medium, said stabilizing strips being bonded to two longitudinal edges of the filter medium along the entire longitudinal sides of the filter element,
a filter element holding frame having longitudinal and transverse frame portions and top and bottom faces said top face being adapted for insertion of the filter element therein and for removal of the filter element therefrom, said filter element holding frame having receiving means for inserting therein and removing therefrom two end portions of the filter element filter medium at the filter element transverse sides,
a sealing medium being arranged between the filter element and the filter element holding frame,
wherein when the filter element is inserted in the filter element holding frame the sealing medium is in abutment with inner sides of said longitudinal frame portions of the filter element holding frame and the two end portions of the filter medium on the filter element transverse sides are inserted in said receiving means provided on said transverse frame portions of the filter element holding frame so that the filter element can be freely removed and disposed of without disposing of the filter element holding frame.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 08/347,370Filed 2 Dec 1994
Priority: DE 9209362 U11 Jul 1992
Granted: 23 Apr 1996
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

B01D 46/521
Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material: using folded, pleated material
B01D 46/0005
Casings; Housings; Frame constructions: mounting of filtering elements within casings, housings or frames
B01D 46/10
Filters or filtering processes specially modified for separating dispersed particles from gases or vapours: particle separators, e.g. dust…
B60H 3/0608
Filtering: filter arrangements in the air stream