Patent · US Active

Filter device

US8216469B2 · kind B2 · utility

1Cited by

9References

5Claims

0Family size

Assignee

HYDAC PROCESS TECHNOLOGY GMBH · DE

Inventors

Ralf Wnuk · Bexbach, DE
Jörg Hermann Gerstner · Ettlingen, DE
Bernhard Schlichter · Saarburg, DE

Key dates

Filing date	Nov 10, 2008
Grant date	Jul 10, 2012
Priority date	—
Expiry date	Nov 10, 2028

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2201/16
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A filter device includes a plurality of filter elements (21) received in a filter housing having a filter inlet for a fluid to be filtered and a filter outlet for the filtered fluid. Flow through the filter elements (21) is possible in both directions for filtration or backwashing. Because the shut-off element (41) is a fast-closing plate valve (43) actuated by a hydraulic piston (53) and blocks the fluid connection so quickly, a feeding effect is created in the manner of a pressure blow on the backwashed filter element (21). The feeding effect increases the cleaning of pollution on the filter element (21), achieving an improved backwashing cleaning.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.