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US 9,789,430 B2Granted
Canister filter with prefiltration
AssigneeAmerican Air Filter Company, Inc.
InventorPaul Jackson
Life of this patent
Estimating the term…
Abstract
An integral canister filter having multiple layers, including a prefiltration layer. The prefiltration layer may filter oil and/or water from an airflow to protect downstream components. The prefiltration layer may be treated with a water and/or oil repelling or absorbing material. The second layer may be a porous membrane filter positioned downstream of the prefiltration layer. The third layer may provide structural support for the first and/or second layers.
Claims27
An integral filter, comprising:
- a multilayer media having at least two layers, said multilayer media positionable in an air flow, said air flow able to pass through said at least two layers;
- a pre-filtration first layer forming an in-flow surface of said multilayer media, wherein said first layer is formed of microglass fibers, and said first layer includes a first material that is hydrophobic, wherein said first material is a binder for binding said microglass fibers, and wherein said first layer is hydrophobic;
- a porous membrane filtration second layer formed of an expanded second material, said second layer downstream of said first layer in said air flow.
An integral filter comprising:
- a multi-layer media having at least three layers in fluid communication with each other to filter an airflow through said multi-layer media;
- a first layer forming an in-flow surface of said multi-layer media, said first layer formed of microglass fibers, said first layer including a first active material for filtering water from said airflow, wherein said first active material is a binder for binding said microglass fibers, and wherein said first layer is hydrophobic;
- a second layer connected to said first layer in a downstream position of said airflow, said second layer including a porous membrane formed of an expanded second material;
- and
- a third layer downstream of said second layer and formed of at least one of polyethylene spun bond, polyethylene air laid, bi-component spun bond, and bi-component air laid, said third layer at least one of pleatable and embossable.
2 more elements
Dependencies are inferred from the claim text.