Devices and methods for aligning filters in a holding frame
First Claim
Patent Images
1. A filter element, compromising:
- an inlet end and an outlet end, the inlet end and the outlet end spaced apart along a central axis at least 3 inches,an extension of filter media extending between the inlet end and the outlet end;
a rectangular header frame at one of the inlet and outlet ends, the rectangular header frame defining a perimeter mating interface having a first lateral span of at least 18 inches and a second lateral span perpendicular to the first lateral span of at least 18 inches, the rectangular header frame having an inner edge facing the central axis and an outer edge facing outwardly away from the central axis;
a keying surface provided along the outer edge, the keying surface being at a location between and spaced from corners of the rectangular header frame; and
wherein the rectangular header frame is configured for seating against a mounting frame or tube sheet having a rectangular seating surface surrounded by an upright wall with a key projection extending over the seating surface, wherein the remainder of the outer edge along a side of the rectangular header frame and the keying surface are adapted to form a gap with the upright wall when installed of at least ⅛
inch to provide clearance for the key projection.
1 Assignment
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Accused Products
Abstract
A filtration system for a gas turbine engine is provided. The filtration system may include a holding frame with a positioning element extending therefrom and a filter element for mounting within the holding frame. The frame of the filter element may include a positioning slot therein such that the positioning element extends into the positioning slot when the filter element is mounted within the holding frame.
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Citations
37 Claims
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1. A filter element, compromising:
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an inlet end and an outlet end, the inlet end and the outlet end spaced apart along a central axis at least 3 inches, an extension of filter media extending between the inlet end and the outlet end; a rectangular header frame at one of the inlet and outlet ends, the rectangular header frame defining a perimeter mating interface having a first lateral span of at least 18 inches and a second lateral span perpendicular to the first lateral span of at least 18 inches, the rectangular header frame having an inner edge facing the central axis and an outer edge facing outwardly away from the central axis; a keying surface provided along the outer edge, the keying surface being at a location between and spaced from corners of the rectangular header frame; and wherein the rectangular header frame is configured for seating against a mounting frame or tube sheet having a rectangular seating surface surrounded by an upright wall with a key projection extending over the seating surface, wherein the remainder of the outer edge along a side of the rectangular header frame and the keying surface are adapted to form a gap with the upright wall when installed of at least ⅛
inch to provide clearance for the key projection. - View Dependent Claims (2, 3, 4)
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5. A filter element, comprising:
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an inlet end and an outlet end, the inlet end and the outlet end spaced apart along a central axis at least 3 inches, an extension of filter media extending between the inlet end and the outlet end; a rectangular header frame at one of the inlet and outlet ends, the rectangular header frame defining a perimeter mating interface having a first lateral span of at least 18 inches and a second lateral span perpendicular to the first lateral span of at least 18 inches, the rectangular header frame having an inner edge facing the central axis and an outer edge facing outwardly away from the central axis; a keying surface provided along the outer edge, the keying surface being at a location between and spaced from corners of the rectangular header frame; and wherein the keying surface is defined by a notch formed in the rectangular header frame, the notch having a notch recess height in the direction of the central axis of between ½ and
1 inches and a notch width perpendicular thereto of at least ¼
inches, and wherein the notch does not extend completely axially through the rectangular header frame in a direction of the central axis. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. A filter element, comprising:
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an inlet end and an outlet end, the inlet end and the outlet end spaced apart along a central axis at least 3 inches, an extension of filter media extending between the inlet end and the outlet end; a rectangular header frame at one of the inlet and outlet ends, the rectangular header frame defining a perimeter mating interface having a first lateral span of at least 18 inches and a second lateral span perpendicular to the first lateral span of at least 18 inches, the rectangular header frame having an inner edge facing the central axis and an outer edge facing outwardly away from the central axis; a keying surface provided along the outer edge, the keying surface being at a location between and spaced from corners of the rectangular header frame; and wherein the keying surface is defined by a notch formed in the rectangular header frame, the notch having a notch width of at least ¼
inches, and wherein the notch extends completely axially through the rectangular header frame in a direction of the central axis. - View Dependent Claims (13, 14)
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15. A filter element, comprising:
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an inlet end and an outlet end, the inlet end and the outlet end spaced apart along a central axis at least 3 inches, an extension of filter media extending between the inlet end and the outlet end; a rectangular header frame at one of the inlet and outlet ends, the rectangular header frame defining a perimeter mating interface having a first lateral span of at least 18 inches and a second lateral span perpendicular to the first lateral span of at least 18 inches, the rectangular header frame having an inner edge facing the central axis and an outer edge facing outwardly away from the central axis; a keying surface provided along the outer edge, the keying surface being at a location between and spaced from corners of the rectangular header frame; and wherein the keying surface is defined at a key location between ½ and
4 inches from a corner of the rectangular header frame, and the keying surface comprises an outer face along the outer edge. - View Dependent Claims (16, 17)
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18. A filter element, comprising:
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an inlet end and an outlet end, the inlet end and the outlet end spaced apart along a central axis at least 3 inches, an extension of filter media extending between the inlet end and the outlet end; a rectangular header frame at one of the inlet and outlet ends, the rectangular header frame defining a perimeter mating interface having a first lateral span of at least 18 inches and a second lateral span perpendicular to the first lateral span of at least 18 inches, the rectangular header frame having an inner edge facing the central axis and an outer edge facing outwardly away from the central axis; a keying surface provided along the outer edge, the keying surface being at a location between and spaced from corners of the rectangular header frame; and wherein the rectangular header frame comprises an axial thickness of between ½ and
1 inches. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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27. A filter element, comprising:
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an inlet end and an outlet end, the inlet end and the outlet end spaced apart along a central axis at least 3 inches, an extension of filter media extending between the inlet end and the outlet end; a rectangular header frame at one of the inlet and outlet ends, the rectangular header frame defining a perimeter mating interface having a first lateral span of at least 18 inches and a second lateral span perpendicular to the first lateral span of at least 18 inches, the rectangular header frame having an inner edge facing the central axis and an outer edge facing outwardly away from the central axis; a keying surface provided along the outer edge, the keying surface being at a location between and spaced from corners of the rectangular header frame; and wherein the keying surface is defined by a positioning notch formed in the rectangular header frame, wherein the notch comprises a notch depth of between 4 mm and 30 mm, and a notch width of between 20and 600 mm, the depth extending into the outer edge toward the central axis, the notch width extending perpendicular thereto. - View Dependent Claims (28, 29, 30, 31)
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32. A filtration system comprising:
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a holding frame comprising a first filter aperture and a second filter aperture adjacent to the first filter aperture; at least one filter clamping system positioned on a first holding frame member of the holding frame and between the first and second filter apertures, wherein the filter clamping system includes a first shoulder bracket extending a first positioning depth from the first holding frame member and a clamp member, wherein the clamp member is rotatable between a filter element clamping position and a filter element releasing position; first and second filter elements, each filter element comprising; an inlet end and an outlet end, the inlet end and the outlet end spaced apart along a central axis at least 3 inches, an extension of filter media extending between the inlet end and the outlet end; a rectangular header frame at one of the inlet and outlet ends, the rectangular header frame defining a perimeter mating interface having a first lateral span of at least 18 inches and a second lateral span perpendicular to the first lateral span of at least 18 inches, the rectangular header frame having an inner edge facing the central axis and an outer edge facing outwardly away from the central axis; a keying surface provided along the outer edge, wherein the keying surface is flush and non-discrete from a remainder of the outer edge along a side of the rectangular header frame, wherein the first and second filter elements are spaced apart by at least the first positioning depth when the first filter element is positioned in the first filter aperture and the second filter element is positioned in the second filter aperture. - View Dependent Claims (33, 34, 35, 36, 37)
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Specification