ACTIVE-PARTICULATE AIR FILTER HAVING MONOLITH PRIMARY FILTER AND POLISHING FILTER
First Claim
Patent Images
1. An air filter that comprises:
- (a) a monolithic primary filter that comprises active-particulate in its generally parallel passageways; and
(b) a polishing filter that has first and second major surfaces and that also contains active-particulate, the polishing filter being generally arranged such that air travels from the first major surface to the second major surface when passing therethrough.
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Abstract
An air filter that includes a primary filter and a polishing filter. The primary filter comprises a monolith 10 that contains active-particulate. The air-to-be-filtered travels through the primary filter in a path generally parallel to the passageways 12. The polishing filter 36 has first and second major surfaces and also contains active-particulate. The polishing filter is generally arranged such that air travels from the first major surface to the second major surface when passing through it. The inventive filter demonstrates extraordinary performance over the same primary and polishing filters taken individually.
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Citations
20 Claims
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1. An air filter that comprises:
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(a) a monolithic primary filter that comprises active-particulate in its generally parallel passageways; and (b) a polishing filter that has first and second major surfaces and that also contains active-particulate, the polishing filter being generally arranged such that air travels from the first major surface to the second major surface when passing therethrough. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 16, 17)
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13. A method of making an air filter, which method comprises:
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(a) providing a monolithic filter that comprises an inlet and an exit and that comprises active-particulate in its generally parallel passageways; and (b) juxtapositioning a polishing filter to the monolithic filter at the exit thereof. - View Dependent Claims (14, 15)
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18. A method of filtering air, which method comprises:
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(a) introducing the air to a first end of a monolithic filter that contains active-particulate in its passageways; (b) passing the air through the monolithic filter in a direction parallel to the passageways such that the fluid exits the monolithic filter at a second end; and
then(c) passing the air through a polishing filter. - View Dependent Claims (19, 20)
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Specification