Back washing fluid filters
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 14, 1981
Grant Date -
N/A
app pub date -
May 9, 1980
filing date -
May 17, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A backwashable filtering device is described of the type including a housing, a filter body, a backwash nozzle having a nozzle inlet disposed adjacent to the upstream surface of the filter body, and pressure sensor means for sensing the pressure drop across the filter body and effective, upon sensing a predetermined pressure drop, to initiate a backwashing operation by connecting the backwash nozzle to the atmosphere and initiating relative rotary movement between the filter body and the backwash nozzle. The filtering device further includes a position sensor for sensing the home angular position of the filter body with respect to the backwash nozzle, and a control effective, only when said home angular position is sensed, for terminating the backwash operation.
First Claim
Family
International Classification(s)
- Non-US Classification not provided for expired patents
Cited Art Landscape
Patent Citation Ranking
- Citation Ranking not provided for expired patents
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