Liquid purification or separation – Magnetic – With additional separator
Reexamination Certificate
2008-07-08
2008-07-08
Reifsnyder, David A (Department: 1797)
Liquid purification or separation
Magnetic
With additional separator
C210S222000, C210S355000, C210S376000, C210S411000, C210S695000
Reexamination Certificate
active
07396460
ABSTRACT:
A filter element (8), especially for use in backwash filtering systems, includes a filtering element through which a contaminated fluid flows in at least one direction (24). An intercepting device (62) has at least one rod-shaped permanent magnet or electromagnet (64) that at least partially removes magnetizable, especially ferritic portions from the fluid, before the fluid flows through the filtering element. A detaching device (68) removes the magnetizable portions from the intercepting device (62). The detaching device (68) is configured by a stripper ring (70) that travels along the rod-shaped magnet (64) and removes the portions retained by the intercepting device (62). When the filtering element is backwashed, the stripper ring (70), moved by the fluid flow, detaches the portions retained by the intercepting device (62). This filter element requires little construction space and allows for the automatic and energetically favorable removal of magnetizable, especially ferritic portions, when the filtering element is backwashed.
REFERENCES:
patent: 2184243 (1939-12-01), Belyavin
patent: 2237964 (1941-04-01), Haught
patent: 4444659 (1984-04-01), Beelitz et al.
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Lahbib Seddik
Olschok Markus
Wnuk Ralf
Hydac Technology GmbH.
Reifsnyder David A
Roylance Abrams Berdo & Goodman L.L.P.
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