Air filter
AssigneeHDT Tactical Systems, Inc.
InventorsWilliam B. Whittier, Mark Huebner, Balika Bellore, Carl Pates
Life of this patent
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Abstract
A gas-particulate filter canister includes a filter canister body and first and second canister end caps secured to opposing ends of the filter canister body. First and second filter cartridges are supported within the filter canister body for filtering a gas in series. The filter cartridges can be standalone units which are built independently and are installed into the filter canister body. The filter cartridges can be concentrically arranged and can include a particulate filter cartridge and a gas filter cartridge.
Claims20
A gas-particulate filter canister comprising:
- a filter canister body;
- first and second canister end caps secured to opposing ends of the filter canister body;
- and
- first and second filter cartridges supported within the filter canister body for filtering a gas in series, each of the first and second filter cartridges having a filter element supported between respective cartridge end caps;
- wherein at least one of the first or second filter cartridges is removable as a unit from the filter canister body.
A method of making a gas-particulate filter canister for filtering a gas comprising the steps of:
- providing a first filter cartridge including filter media supported between a first set of end caps;
- providing a second filter cartridge including media supported between a second set of end caps;
- inserting the first and second filter cartridges into a filter canister body;
- and
- securing inlet and outlet end caps to respective ends of the canister body with the first and second filter cartridges trapped therebetween.
A gas filtration assembly comprising
- a canister including a hollow interior and open first and second ends;
- an inlet end cap secured to the first end of the canister, the inlet end cap including a first aperture;
- an outlet end cap secured to the second end of the canister, the outlet end cap including a second aperture;
- first and second annular filter cartridges concentrically arranged within the hollow interior of the canister, each filter cartridge including porous side walls and non-porous end walls;
- and
- wherein a gas to be filtered flows axially into the canister through the first aperture, radially through the first and second filter cartridges and axially out through the second aperture.
Dependencies are inferred from the claim text.