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US 12,286,345 B2Granted
Filter assembly
Assignee3M Innovative Properties Company
InventorsHannah L. Stoughton, Tommie W. Kelley, Windy A. Santa Cruz, Matthew W. Gorrell, John B. Stender, Christine L. McCool, Michael L. Elam, Michael S. Schuffert, Jackson H. Hedden, Frank Tyneski, John M. Vernon
Life of this patent
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Abstract
Filter assemblies are disclosed. In particular, filter assemblies including a filter media and an overlay portion covering the filter media are disclosed. Such filter assemblies may provide both acceptable filtering capacity and cleanable visible front surfaces.
Claims14
A filter assembly, comprising:
- a filter media including a web having first and second major sides, a first major surface, and a thickness, the web including at least one of an oleophilic material or a fire retardant material;
- and
- a filter frame, wherein the filter frame includes an overlay portion, the overlay portion covering, from a top plan view, at least 20% but no more than 80% of the first major surface by area,
- wherein the overlay portion is continuous and defines a plurality of open areas,
- wherein the overlay portion includes a material different from the filter media, and
- wherein the overlay portion curves in the thickness direction of the filter assembly and includes at least one flat surface portion, the flat surface portion defined by having a radius of curvature greater than 10 cm along at least one direction.
3 more elements
A filter assembly, comprising:
- a filter media including a web having first and second major sides, a first major surface, and a thickness, the web including at least one of an oleophilic material or a fire retardant material;
- and
- a filter frame, wherein the filter frame includes an overlay portion, the overlay portion covering, from a top plan view, at least 20% but no more than 80% of the first major surface by area,
- wherein the overlay portion is continuous and defines a plurality of open areas,
- wherein the overlay portion includes a material different from the filter media, and
- wherein the overlay portion includes at least one flat surface portion, wherein the at least one flat surface portion is disposed such that tangent planes forming a non-zero inclination angle with a reference plane normal to the thickness do not vary by more than 20 degrees from an average inclination angle of the at least one flat surface portion.
3 more elements
Dependencies are inferred from the claim text.