Descending bed filter
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 11, 2003
Grant Date -
Mar 28, 2002
app pub date -
Sep 27, 2001
filing date -
Apr 20, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved vertical filtration unit which includes an airlift and a washbox designed for more efficient washing of dirt particles from the filtration material. The washbox consists of a filter media shield, and a washbox skirt for washing of the filtration material. A throttling valve on the wash water discharge line regulates the overall cleaning rate of the unit. The filtered liquid is discharged via a riser pipe which feeds into a filtered liquid box before exiting the filtration unit.
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