Filter device including pleated filter incorporated in a...

Details Filter device including pleated filter incorporated in a... Filter device including pleated filter incorporated in a...

2008-07-29

2008-07-29

Menon, Krishnan S. (Department: 1797)

Liquid purification or separation

Filter

Within flow line or flow line connected close casing

C210S435000, C210S437000, C210S487000, C210S493100, C210S455000, C210S472000

Reexamination Certificate

active

11087840

ABSTRACT:
The present invention provides a filter that can minimize the amount of residual liquid within the housing or container with a simplified construction. The article includes a cylinder portion having a cylindrical internal space with both ends open, a cylindrically formed pleated filter5inserted in the internal space of the cylinder portion3in contact with the inner wall of the cylinder portion3and having upper and lower edges liquid-tightly sealed. A perforate inner core7supports the inner surface of the pleated filter5, lower and upper end caps9, 11are liquid-tightly bonded to the respective ends of the cylinder portion3. A liquid distribution passage21communicates with gaps between the pleats of the pleated filter5from the lower portion of the cylinder portion3. A liquid feed inlet15communicates with the liquid distribution passage21formed between the periphery of the pleated filter and a tapered inner wall surface8of the cylinder portion3. A filtrate liquid withdrawal passage25communicates with an internal passage23of the perforate core7, and a filtrate outlet27communicates with the withdrawal passage.

REFERENCES:
patent: 5143612 (1992-09-01), Hamanaka et al.
patent: 5620599 (1997-04-01), Hopkins et al.
patent: 5928511 (1999-07-01), Messner et al.
patent: 6110368 (2000-08-01), Hopkins

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