Air filter arrangement having first and second filter media dividing a housing and methods
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Apr 3, 2001
Grant Date -
N/A
app pub date -
Feb 26, 1999
filing date -
Feb 26, 1999
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A filter arrangement includes a housing having first and second stage regions of filtering. The air flows through an inlet and into a first chamber having a cross-sectional area larger than the inlet. The air expands and particles drop to the bottom of the chamber. The air then passes through the first stage filter media. Additional particles are trapped by the filter media and dropped to the bottom of the first chamber. The air then flows into a second chamber and then through a second stage filter arrangement. Additional particles are removed in the second stage filter arrangement. The air is then exhausted. One preferred application is in a shop-vacuum. Methods of cleaning air and changing out the filters are provided herein.
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