IP Library › Granted Patent US 6,846,409
Granted Patent B2
US 6,846,409 · App. 10/380,314 · Granted Jan 25, 2005

Liquid filtration device

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Quick Facts
Patent No.
US 6,846,409
App. No.
10/380,314
Granted
Jan 25, 2005
Kind
B2
Abstract

The present invention provides a liquid filtration device with internal flow paths that facilitate the purging of air bubbles from the device. The device includes internal channels that collect bubbles from fluid entering the filtration device and more efficiently direct fluid to sweep bubbles from the device during operation. The present invention also provides for an automatic means to minimize fluid loss during a vent process.

Claims (16)

1. A liquid filtration device with internal flow paths that facilitate the purging of air bubbles therefrom, the device comprising:

a housing, said housing including

a bowl;

a cap, and

a cover, the cover having internal and external surfaces and characterized by apertures therein that serve as fluid inlet, outlet and vent, whereby said cap, cover and bowl are combined in such a manner that fluid channels are created, such channels facilitating sweeping bubbles out of the device and toward the vent, said channels including:

a fluid channel that directs fluid toward that portion of the housing where the vent is located;

a fluid channel that directs fluid to sweep the bottom of the bowl; and

a fluid channel that directs fluid to sweep the undersurface of the cap.

2. The device of claim 1 further comprising vent paths that converge.

3. The device of claim 2 , wherein, said vent path convergence being juxtaposed to the nadir of the volume between the cap and the cover.

4. The device of claim 2 , whereby the underside of said top cap has a sloping surface, said sloping surface having a nadir and zenith.

5. The device of claim 4 , said surface zenith being juxtaposed to said vent aperture.

6. The device of claim 5 , wherein, said vent path convergence being juxtaposed to the nadir of the volume between the cap and the cover.

7. The device of claim 4 , said surface nadir being juxtaposed to said converged vent flow paths.

8. The device of claim 7 , wherein, said vent flow path convergence juxtaposed to the nadir of the volume between the cap and the cover.

9. The device of claim 1 , wherein the internal surface of the cover defines a vent ridge.