Scraper filter system
AssigneeArai Corporation
InventorKoichi Arai
Life of this patent
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Abstract
A scraper filter system, which comprises a screw-formed spiral impeller within a cylindrical filter element, and a scraper in the groove formed along the spiral end of the impeller for engagement with the internal surface of the filter element for scrapingly removing solid components deposited on the surface of the filter element. The scraper is comprised of a plurality of separate arcuate segments each being urged radially in the external direction by a resilient member, and also includes a securing element for preventing movement of each segment in the groove with respect to the spiral edge of the spiral impeller.
Claims19
A scraper filter device comprising:
- a filter element of a cylindrical or conical form having a cylindrical wall formed with a filter surface, in which a plurality of filter openings of a predetermined dimension are formed;
- a spiral impeller mounted for rotation with respect to a longitudinal axis along the internal surface of said filter element;
- scraper means disposed around the spiral edge of said spiral impeller;
- said means including a plurality of separate arcuate segments each being urged radially and externally by a resilient member means for resiliently engaging with said filter surface, each of said segments not being rigidly attached to the sprial impeller along the entire length of said segment whereby all the segments are moveable in said external radial direction over the entire length thereof.
Dependencies are inferred from the claim text.