Inlet frame and filter assembly including an inlet frame
First Claim
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1. An apparatus for supporting a primary filter and a prefilter, the apparatus comprising:
- a plastic frame having a first inlet opening and a first seating surface in surrounding relation to the first inlet opening;
a first set of retainers mounted on the plastic frame, each retainer of the first set of retainers includes a first compression portion that is selectively rotatable via rotation of the retainer relative to the plastic frame between a position over the first seating surface and a position clear of the first seating surface, the first compression portion of each retainer of the first set of retainers being spaced a first distance from the seating surface; and
a second set of retainers mounted on the plastic frame, each retainer of the second set of retainers includes a first compression portion that is selectively rotatable via rotation of the retainer relative to the plastic frame between a position over the first seating surface and a position clear of the first seating surface, the first compression portion of each retainer of the second set of retainers being spaced a second distance from the seating surface, the second distance being different than the first distance.
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Abstract
A filter assembly including a rectangular inlet frame having a rectangular inlet opening configured to receive a primary filter and optionally a prefilter. The filter assembly may include a rectangular outlet frame and a housing body. The rectangular inlet frame may also be used as a housing by itself to support and house primary filters and prefilters. A gridwork including one or more grid dividers may be used in the rectangular inlet frame to provide 2 or more openings for receipt of filters.
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Citations
25 Claims
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1. An apparatus for supporting a primary filter and a prefilter, the apparatus comprising:
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a plastic frame having a first inlet opening and a first seating surface in surrounding relation to the first inlet opening; a first set of retainers mounted on the plastic frame, each retainer of the first set of retainers includes a first compression portion that is selectively rotatable via rotation of the retainer relative to the plastic frame between a position over the first seating surface and a position clear of the first seating surface, the first compression portion of each retainer of the first set of retainers being spaced a first distance from the seating surface; and a second set of retainers mounted on the plastic frame, each retainer of the second set of retainers includes a first compression portion that is selectively rotatable via rotation of the retainer relative to the plastic frame between a position over the first seating surface and a position clear of the first seating surface, the first compression portion of each retainer of the second set of retainers being spaced a second distance from the seating surface, the second distance being different than the first distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An apparatus for use with a primary filter and a prefilter, comprising
a plastic frame defining a plurality of inlet openings, the plurality of inlet openings being defined by a rectangular border wall and at least one divider extending within the rectangular border wall to divide an internal area of the rectangular border wall into the plurality of inlet openings; -
the a rectangular border wall and the at least one divider defining rectangular seating surfaces, each rectangular seating surface surrounding one of the inlet openings; a first set of retainers positioned along both of the rectangular border and the divider spaced from the rectangular seating surface a first distance that is adapted to secure the primary filter against rectangular seating surface; and a second set of retainers offset laterally from the first set of retainers, the second set of retainers positioned along both of the rectangular border and the divider spaced from the rectangular seating surface a second distance greater than the first distance that is adapted to secure the prefilter over the primary filter. - View Dependent Claims (19, 20, 21, 22, 23)
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24. An apparatus for use with a primary filter and a prefilter, comprising
a plastic frame defining a plurality of inlet openings, the plurality of inlet openings being defined by a rectangular border wall and at least one divider extending within the rectangular border wall to divide an internal area of the rectangular border wall into the plurality of inlet openings, the a rectangular border wall and the at least one divider defining rectangular seating surfaces, each rectangular seating surface surrounding one of the inlet openings; -
a plurality of posts arranged along the rectangular border wall and the divider, the posts extending outward from a plane defined by the border wall and the at least one divider in a direction extending away from the rectangular seating surfaces; a first set of retainers positioned along both of the rectangular border and the divider spaced from the rectangular seating surface a first distance that is adapted to secure the primary filter against rectangular seating surface; and a second set of retainers positioned along both of the rectangular border and the divider spaced from the rectangular seating surface a second distance greater than the first distance that is adapted to secure the prefilter over the primary filter. - View Dependent Claims (25)
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Specification