Air filter
First Claim
1. An air filter having an inlet for air and an outlet for air comprising in combination:
- a body having a central channel, a first side, a second side, and a middle positioned between the first side and the second side, wherein a constriction is formed in the central channel at the middle;
a first fan positioned in the central channel near the first side,a second fan positioned in the central channel near the second side, wherein each fan blows air in the same direction; and
a filter cartridge positioned in the central channel at the middle, wherein during operation air flows from the inlet to the filter cartridge to the outlet, and substantially all air blown from the first fan passes through the second fan.
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Abstract
An air filter having an inlet for air and an outlet for air comprises a body having a central channel, a first side with a first area, a second side having a second area, and a middle having a middle area, positioned between the first side and the second side. The middle area is less than the first area and less than the second area. A first fan is positioned in the body near the first side, and a second fan positioned in the body near the second side, and each fan blows air in the same direction. A filter cartridge is positioned in the central channel at the middle, wherein during operation air flows from the inlet to the filter cartridge to the outlet.
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Citations
29 Claims
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1. An air filter having an inlet for air and an outlet for air comprising in combination:
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a body having a central channel, a first side, a second side, and a middle positioned between the first side and the second side, wherein a constriction is formed in the central channel at the middle; a first fan positioned in the central channel near the first side, a second fan positioned in the central channel near the second side, wherein each fan blows air in the same direction; and a filter cartridge positioned in the central channel at the middle, wherein during operation air flows from the inlet to the filter cartridge to the outlet, and substantially all air blown from the first fan passes through the second fan. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An air filter having an inlet for air and an outlet for air comprising, in combination:
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a body having a central channel having a circular cross section, with a constriction formed in the central channel at a middle between a first side and a second side; a first fan positioned in the central channel near the first side; a second fan positioned in the central channel near the second side, wherein each fan blows air in the same direction; and a filter cartridge positioned in the central channel at the middle, and shaped with a wider center and ends remote from the center narrower than the center; wherein the first fan and the second fan have a same size, the central channel has a same cross sectional area at both the first fan and the second fan, and during operation air flows from the inlet to the filter cartridge to the outlet, and substantially all air blown from the first fan passes through the second fan. - View Dependent Claims (24, 25, 26, 27, 28, 29)
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Specification