A filter apparatus, including a dual-chambered, centrifugal and compressive filtration apparatus having a central annular filter element, rotating external radial fins extending from adjacent the filter element to adjacent an outer cannister wall and internal fins within the annular filter element.
A filter apparatus, including a dual-chambered, centrifugal and compressive filtration apparatus having a central annular filter element, rotating external radial fins extending from adjacent the filter element to adjacent an outer cannister wall and internal fins within the annular filter element. The disclosed filter element is a continuous resilient, cylindrical, helical filter coil including a regular sinusoidal shape defining loop-shaped filter pores between adjacent coils.
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The invention claimed is: 1. A centrifugal filter apparatus, comprising: a canister housing having an enclosed internal filter chamber, an inlet and an outlet; a central annular filter element having a plurality of circumferentially spaced filter pores located within said filter chamber; external c
The invention claimed is: 1. A centrifugal filter apparatus, comprising: a canister housing having an enclosed internal filter chamber, an inlet and an outlet; a central annular filter element having a plurality of circumferentially spaced filter pores located within said filter chamber; external centrifugal radial fins surrounding said annular filter element rotating around said filter element and canted relative to an axis of said filter element driving fluid relative filter element; internal centrifugal radial fins rotatably supported within said annular filter element and canted relative to an axis of the filter element; and a drive mechanism rotating said external and internal centrifugal radial fins. 2. The centrifugal filter apparatus as defined in claim 1, wherein said internal centrifugal radial fins are canted downwardly relative to an axis of rotation of said internal centrifugal radial fins, driving liquid supernatant downwardly through a generally axial liquid outlet. 3. The centrifugal filter apparatus as defined in claim 1, wherein said annular filter element is a continuous flexible resilient helical coil having a regular sinusoidal shape in the direction of the helix defining circumferentially spaced loop-shaped filter pores between adjacent helical coils, and including a filter drive engaging said helical coil to adjust a volume of said loop-shaped filter pores. 4. The centrifugal filter apparatus as defined in claim 3, wherein said helical coil is formed from flat wire stock forming flat engaging upper and lower surfaces on adjacent helical coils, and said filter drive including a motor engaging one of said filter coils rotating said one of said helical coils relative to an adjacent helical coil into and out of registry, thereby adjusting a volume of said filter pores. 5. The centrifugal filter apparatus as defined in claim 3, wherein said filter drive includes a piston driven against said helical coil by pneumatic or hydraulic pressure for increasing or decreasing a volume of said filter pores and permitting quick release during purging. 6. The centrifugal filter apparatus as defined in claim 1, wherein said internal centrifugal radial fins are spiral shaped. 7. A centrifugal filter apparatus, comprising: a canister housing having a generally cylindrical internal surface, an inlet and two outlets, including a generally axial liquid supernatant outlet and a solids outlet adjacent said inner surface of said canister housing; a central generally cylindrical annular filter element having a plurality of circumferentially spaced filter pores; rotatably supported external centrifugal radial fins extending generally radially from adjacent an exterior surface of said filter element to adjacent said generally cylindrical internal surface of said canister housing relative to, said external centrifugal fins canted relative to an axis of rotation; and a drive mechanism rotating said external cylindrical radial fins and said filter element driving solids radially outwardly toward said generally cylindrical internal surface of said canister housing and said solids outlet with liquid supernatant flowing through said annular filter element to said generally axial liquid supernatant outlet. 8. The centrifugal filter apparatus as defined in claim 7, wherein said centrifugal filter apparatus includes internal centrifugal radial fins rotatably driven within said annular filter element and said drive mechanism rotatably drives said internal centrifugal radial fins. 9. The centrifugal filter apparatus as defined in claim 8, wherein said internal centrifugal radial fins are canted relative to an axis of rotation, said internal centrifugal fins driving liquid supernatant downwardly through said generally axial liquid supernatant outlet. 10. The centrifugal filter apparatus as defined in claim 7, wherein said central generally cylindrical annular filter element includes a continuous resilient helical coil having a plurality of interconnected generally circular helical coils, said generally circular helical coils having a generally regular sinusoidal shape in a direction of the helix including opposed contacting flat top and bottom surfaces forming loop-shaped circumferentially spaced filter pores between adjacent coils, and said centrifugal filter apparatus including a filter drive engaging said helical coil compressing and releasing compression of said helical coil to decrease or increase a volume of said loop-shaped filter pores. 11. The centrifugal filter apparatus as defined in claim 10, wherein said filter drive further rotates one generally circular helical coil relative to a remainder of said generally circular helical coils into and out of registry, thereby modifying a volume of said loop-shaped filter pores. 12. The centrifugal filter apparatus as defined in claim 10, wherein said filter drive includes a piston driven against said helical coil by pneumatic or hydraulic pressure. 13. A filter apparatus, comprising: a continuous flexible resilient generally cylindrical helical coil including a plurality of interconnected generally circular helical coils having a substantially regular sinusoidal shape in the direction of the helix, including opposed top and bottom surfaces of adjacent coils in contact at circumferentially spaced locations forming loop-shaped filter pores between adjacent coils; a first filter drive engaging said helical coil compressing or releasing compression of said helical coil to decrease or increase a volume of said loop-shaped filter pores; and a second filter drive engaging said helical coil and rotating one of said generally circular helical coils relative to a remainder of said generally circular helical coils into and out of registry, thereby modifying and controlling a volume of said loop-shaped filter pores. 14. The filter apparatus as defined in claim 13, wherein said first filter drive includes a piston driven against said helical coil by pneumatic or hydraulic pressure for quick release during purging. 15. The filter apparatus as defined in claim 13, wherein said second filter drive is a stepper motor connected to said helical coil accurately rotating and controlling rotation of one of said generally circular helical coils relative to a remainder of said generally circular helical coils. 16. A centrifugal filter apparatus, comprising: a canister housing having an enclosed internal filter chamber, an inlet and an outlet; a central annular filter element formed of a continuous flexible resilient helical coil having a regular sinusoidal shape in the direction of the helix defining circumferentially spaced filter pores between adjacent coils; external centrifugal radial fins extending generally radially from adjacent an external surface of said annular filter element to adjacent an internal surface of said filter chamber; internal centrifugal radial fins rotatably supported within said annular filter element; and a drive mechanism rotating said external and internal centrifugal radial fins.
Griffin, Timothy R.; Gilarranz, Jose L., Method for on-line detection of liquid and potential for the occurrence of resistance to ground faults in active magnetic bearing systems.
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