Scraper filter system
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United States of America Patent
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Feb 16, 1993
Grant Date -
N/A
app pub date -
Aug 6, 1991
filing date -
Aug 16, 1990
priority date (Note) -
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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.
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