Inline filter apparatus
First Claim
Patent Images
1. An air filter cartridge device for inserting into a duct having an upstream side and downstream side with flow passing from the upstream side to the downstream side through the filter cartridge, comprising:
- structurally self-supporting fluted filtering media having an outer portion, the filter media comprising a plurality of substantially parallel flutes extending along the direction from the upstream side to the downstream side;
an integrally formed impermeable layer enclosing the outer portion of the fluted filter media forming an outer wall of the duct over the fluted filter media and connecting to upstream and downstream portions of the duct; and
,means for forming a seal between the integrally formed impermeable layer and the duct on the downstream side of the filter media when the filter media is inserted into the duct.
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Abstract
A filter device inserts into a duct having flow passing from upstream to downstream. The filter device includes fluted filter media having flutes formed therein. The filter forms a seal between the outer edge of the filter and the downstream side of the duct. The filter media may be rolled or stacked in layers to match the shape of the duct.
632 Citations
28 Claims
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1. An air filter cartridge device for inserting into a duct having an upstream side and downstream side with flow passing from the upstream side to the downstream side through the filter cartridge, comprising:
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structurally self-supporting fluted filtering media having an outer portion, the filter media comprising a plurality of substantially parallel flutes extending along the direction from the upstream side to the downstream side; an integrally formed impermeable layer enclosing the outer portion of the fluted filter media forming an outer wall of the duct over the fluted filter media and connecting to upstream and downstream portions of the duct; and
,means for forming a seal between the integrally formed impermeable layer and the duct on the downstream side of the filter media when the filter media is inserted into the duct. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 10, 11, 23, 24, 25, 26, 27, 28)
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7. A filter device for inserting into a duct having flow passing from an upstream side to a downstream side through the filter, comprising:
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structurally self-supporting fluted filtering media having a plurality of substantially parallel flutes defining an outer portion, wherein the flutes are aligned relative to the flow to provide flow through the filter device substantially longitudinally in a substantially straight line from the upstream side to the downstream side wherein the filtering media comprises alternating first and second flutes having an open upstream face, wherein the first flutes include closed portions recessed a first distance from the upstream face of the flutes and the second flutes include closed portions recessed a second distance greater than the first distance from the upstream face of the flutes; an impermeable protective layer enclosing the outer portion of the filter media; and
,a seal between the protective layer on the downstream side of the filter media and the duct when the filter media is placed in the duct. - View Dependent Claims (21)
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12. A filter device having an upstream side and a downstream side and flow passing from the upstream side to the downstream side through the filter, comprising:
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structurally self-supporting fluted filtering media aligned longitudinally from the upstream side to the downstream side having an outer portion; an integral impermeable layer enclosing the outer portion of the filter media; and
,an open filter material element intercepting flow upstream from the self-supporting fluted filtering media and abutting the impermeable layer. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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22. A filter device for inserting into a duct having an upstream side and a downstream side and flow passing from the upstream side to the downstream side through the filter, comprising:
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structurally self-supporting fluted filtering media having a plurality of substantially parallel flutes defining an outer portion, wherein the flutes are aligned relative to the upstream flow to provide flow through the filter device substantially parallel to the direction from the upstream side to the downstream side; an integral impermeable protective skin enclosing the outer portion of the filter media and forming an intermediate filtering duct section engaging upstream and downstream sections of the duct; and
,means for sealing a connection between the protective layer and the duct on the downstream side of the filter media when the filter media is placed in the duct.
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Specification