Filter element with discrete heat generators and method of manufacture
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United States of America Patent
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Apr 30, 2002
Grant Date -
N/A
app pub date -
Jun 23, 2000
filing date -
Jun 23, 2000
priority date (Note) -
Expired
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Abstract
A microwave regenerable filter element including a filter media for filtering particulates from an exhaust gas, and a plurality of discrete heat generators disposed in the filter media, each of the plurality of discrete heat generators being adapted to absorb microwave energy and convert the microwave energy into heat. In one embodiment, the plurality of discrete heat generators may have a length dimension of substantially 1/2 of a microwave wavelength and a width dimension of substantially 1/8 of a microwave wavelength. In another embodiment, the plurality of discrete heat generators may be disposed in a spatial array in a manner that density of the plurality of discrete heat generators varies radially away from a central axis of the filter element. In yet another embodiment, the density of the plurality of discrete heat generators in the spatial array may also vary axially along the central axis of the filter element.
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