Filtering systems with integral filter back-flushing

Details Filtering systems with integral filter back-flushing Filtering systems with integral filter back-flushing

2011-02-01

2011-02-01

Menon, Krishnan S (Department: 1772)

Liquid purification or separation

Processes

Separating

C210S106000, C210S108000, C210S333100, C210S341000, C210S121000, C210S123000, C210S195100

Reexamination Certificate

active

07879248

ABSTRACT:
A filter system includes a distribution valve operable to direct a received fluid stream to first and second outlets during respective first and second cycles. A filtering system filters at least some fluid output from the first outlet of the distribution valve during the first cycle with a first filter while back-flushing a second filter and filters at least some fluid output from the second outlet of the distribution valve during the second cycle with the second filter while back-flushing the first filter.

REFERENCES:
patent: 4039452 (1977-08-01), Fernandez
patent: 4055499 (1977-10-01), Laxo
patent: 5096598 (1992-03-01), Pecen et al.
patent: 5670038 (1997-09-01), McKinney
patent: 5766475 (1998-06-01), Mayer et al.
patent: 6022481 (2000-02-01), Blake
patent: 6203714 (2001-03-01), Bos et al.
patent: 6217760 (2001-04-01), Bovington

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