Filter housing for accommodating a plurality of filter sizes
First Claim
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1. A filter housing releasably receiving a filter, the filter housing comprising:
- (a) a duct having a longitudinal axis, an inlet and an outlet spaced from the inlet along the longitudinal axis, the duct having a cross section extending along the longitudinal axis, the duct including a first access port transverse to the longitudinal axis;
(b) a first registration flange extending into the cross section at a first position along the longitudinal axis;
(c) a second registration flange extending into the cross section at a different second position along the longitudinal axis, the first access port being longitudinally intermediate the first registration flange and the second registration flange; and
(d) a first removable seating rail assembly sized to pass through the first access port and releasably engage an inside surface of the duct longitudinally intermediate the first registration flange and the second registration flange, the first seating rail assembly being separate from the filter and including a seating flange extending into the cross section.
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Abstract
A filter housing includes a duct having at least one registration flange and an access port sized to pass a plurality of seating rail assemblies. Each seating rail assembly is releasably engaged with the duct includes a seating flange. By locating the seating rail assembly at a particular distance from the registration flange, a channel of different sizes can be formed for receiving a filter having a corresponding dimension.
14 Citations
19 Claims
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1. A filter housing releasably receiving a filter, the filter housing comprising:
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(a) a duct having a longitudinal axis, an inlet and an outlet spaced from the inlet along the longitudinal axis, the duct having a cross section extending along the longitudinal axis, the duct including a first access port transverse to the longitudinal axis; (b) a first registration flange extending into the cross section at a first position along the longitudinal axis; (c) a second registration flange extending into the cross section at a different second position along the longitudinal axis, the first access port being longitudinally intermediate the first registration flange and the second registration flange; and (d) a first removable seating rail assembly sized to pass through the first access port and releasably engage an inside surface of the duct longitudinally intermediate the first registration flange and the second registration flange, the first seating rail assembly being separate from the filter and including a seating flange extending into the cross section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A filter housing for releasably retaining a filter, the filter housing comprising:
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(a) a duct extending along a longitudinal axis, the duct having a first registration flange for operably engaging the filter, the first registration flange extending transverse to the longitudinal axis and a first access port; (b) a plurality of separate seating rail assemblies, each seating rail assembly including a seating flange extending transverse to the longitudinal axis and a spacing foot extending along the longitudinal axis and defining a predetermined length perpendicular to the seating flange; and (c) a retaining mechanism on at least one of the duct and the seating rail assemblies for releasably and independently retaining the seating rail assemblies within the duct to define a channel sized to receive the filter between the seating flange and the first registration flange. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A filter housing comprising:
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(a) a duct having an upstream end, a downstream end and a constant given cross sectional area along a longitudinal axis between the upstream end and the downstream end; and (b) a first registration flange longitudinally spaced from the upstream end and the downstream end and projecting into the duct intermediate the upstream end and the downstream end to define a second cross sectional area smaller than the given cross sectional area; the duct having an access port intermediate the upstream end and the downstream end exposing the first registration flange. - View Dependent Claims (16, 17, 18, 19)
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Specification