Filtration apparatus operating features

Liquid purification or separation – Flow – fluid pressure or material level – responsive

Reexamination Certificate

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Details

C210S103000, C210S105000, C210S227000, C210S400000

Reexamination Certificate

active

07011741

ABSTRACT:
A pressure-filter apparatus includes at least one filtration chamber coupled with a source of slurry. The filtration chamber is also coupled with a source of fluid at an elevated pressure, which may be arranged in series or in parallel with a source of wash fluid. The pressure-filter apparatus may also include a source of fluid at a conventional pressure. The source of fluid at elevated pressure has a limited volume for initially treating the slurry within the chamber. The source of fluid at conventional pressure has a substantially unlimited volume for completing the treating of slurry within the chamber. The relative volume capacity of the two fluid sources provides an improved efficiency in the treatment of the slurry and the overall efficiency of the apparatus by limiting the time and capacity of accumulation of elevated pressure fluid while using the conventional pressure for extended treatment of the slurry within the chamber.

REFERENCES:
patent: 4664813 (1987-05-01), Schneider
patent: 5059318 (1991-10-01), Benesi
patent: 5292434 (1994-03-01), Benesi
patent: 5462677 (1995-10-01), Benesi
patent: 5477891 (1995-12-01), Benesi
patent: 5482594 (1996-01-01), Salminen
patent: 5510025 (1996-04-01), Benesi
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patent: 5615713 (1997-04-01), Benesi
patent: 6159359 (2000-12-01), Benesi
patent: 6274042 (2001-08-01), Beck
patent: 6280638 (2001-08-01), Belchev
patent: 6491817 (2002-12-01), Benesi
patent: 6521135 (2003-02-01), Benesi
patent: 2003/0127401 (2003-07-01), Benesi

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