Deep filter element suitable for replacing a shallow filter element and having a support frame made from thin stock
First Claim
Patent Images
1. A filter assembly, comprising:
- a filter medium having first and second opposite faces, through which air to be filtered can pass, the first and second opposite faces being separated by a distance; and
a frame including two or more opposing side faces to provide support to the filter medium, each of the two or more opposing side faces having a length perpendicular to the distance between the first and second opposite faces, the frame including a first sheet that includes a first portion that extends along a majority of the length of one of the two or more opposing side faces and a second portion that extends along at least part of the first opposite face and a second sheet that includes a first portion that also extends along a majority of the length of the one of the two or more opposing side faces and a second portion that extends along at least part of the first opposite face, wherein at least part of the second portion of the first sheet that extends along at least part of the first opposite face is secured to at least part of the second portion of the second sheet that extends along at least part of the first opposite face.
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Accused Products
Abstract
A deep format filter element has a peripheral frame with outwardly protruding mounting flanges. The mounting flanges simulate the periphery of a shallow format filter element to allow the deep format filter element to replace the shallow format filter element in many situations.
66 Citations
27 Claims
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1. A filter assembly, comprising:
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a filter medium having first and second opposite faces, through which air to be filtered can pass, the first and second opposite faces being separated by a distance; and a frame including two or more opposing side faces to provide support to the filter medium, each of the two or more opposing side faces having a length perpendicular to the distance between the first and second opposite faces, the frame including a first sheet that includes a first portion that extends along a majority of the length of one of the two or more opposing side faces and a second portion that extends along at least part of the first opposite face and a second sheet that includes a first portion that also extends along a majority of the length of the one of the two or more opposing side faces and a second portion that extends along at least part of the first opposite face, wherein at least part of the second portion of the first sheet that extends along at least part of the first opposite face is secured to at least part of the second portion of the second sheet that extends along at least part of the first opposite face. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A filter assembly, comprising:
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a filter medium having first and second opposite faces, through which air to be filtered can pass, the first and second opposite faces being separated by a distance; and a frame including two or more opposing side faces to provide support to the filter medium, each of the two or more opposing side faces having a length perpendicular to the distance between the first and second opposite faces, the frame including a first sheet that extends along at least a majority of the length of a first side face of the two or more opposing side faces for at least a majority of the distance between the first and second opposite faces, and a second sheet that extends along at least a majority of the length the first side face for at least a majority of the distance between the first and second opposite faces, wherein the second sheet overlaps and is secured to the first sheet along at least a portion of the first side face. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A filter assembly, comprising:
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a filter medium having first and second opposite faces, through which air to be filtered can pass, the first and second opposite faces being separated by a distance; a first cardboard sheet that extends along at least a first side face of the filter medium for at least a majority of the distance between the first and second opposite faces; a second cardboard sheet that extends along at least the first side face of the filter medium for at least a majority of the distance between the first and second opposite faces, the first cardboard sheet overlapping the second cardboard sheet for a majority of the length of the first side face, and the first cardboard sheet secured to the second cardboard sheet along at least part of said one or more side faces; and a flange that extends in a direction laterally away from the filter medium and around at least a portion of the perimeter of the first opposing face, the flange having at least two inside folds that define at least part of a cavity. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. A filter assembly, comprising:
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a filter medium having first and second opposite faces, through which air to be filtered can pass, and a number of side faces that extend between the first and second opposite faces, the first and second opposite faces being separated by a distance; a frame extending along one or more of the side faces to provide support to the filter medium, the frame including a first sheet that includes a portion that extends down along at least part of the first opposing face and a second sheet that includes a portion that also extends down along at least part of the first opposing face, wherein at least part of the portion of the first sheet that extends down along at least part of the first opposing face is secured to at least part of the portion of the second sheet that extends down along at least part of the first opposing face; wherein the first sheet also extends along at least one of the side faces for at least a majority of the distance between the first and second opposite faces; wherein the second sheet also extends along at least one of the side faces for at least a majority of the distance between the first and second opposite faces, and is secured to the first sheet along at least one of the side faces; wherein the second sheet also includes a portion that extends down along at least part of the second opposing face; and wherein the first sheet does not include a portion that extends down along at least part of the second opposing face. - View Dependent Claims (25)
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26. A filter assembly, comprising:
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a filter medium having first and second opposite faces, through which air to be filtered can pass, and a number of side faces that extend between the first and second opposite faces, the first and second opposite faces being separated by a distance; a frame extending along one or more of the side faces to provide support to the filter medium, the frame including a first sheet that includes a portion that extends down along at least part of the first opposing face and a second sheet that includes a portion that also extends down along at least part of the first opposing face, wherein at least part of the portion of the first sheet that extends down along at least part of the first opposing face is secured to at least part of the portion of the second sheet that extends down along at least part of the first opposing face; and a flange that extends in a direction laterally away from the filter medium and around at least a portion of the perimeter of the first opposing face, wherein the flange includes a portion that extends down along at least part of the first opposite face. - View Dependent Claims (27)
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Specification