Patent · US Expired

Filter device

US7279091B2 · kind B2 · utility

5Cited by

10References

20Claims

0Family size

Assignee

HYDAC FILTERTECHNIK GMBH · DE

Inventors

Norbert Sann · Riegelsberg, DE
Werner Wilkendorf · Ottweiler, DE

Key dates

Filing date	Jan 12, 2002
Grant date	Oct 9, 2007
Priority date	—
Expiry date	Oct 9, 2022

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2201/313
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A filter device has a filter housing (10) receiving a first filter element (12), through which a medium may flow in a given direction, and has a bypass device (22). Along with the first filter element (12), a second filter element (32) is provided. The filter elements are arranged in series, one behind the other, in the direction of flow. When the bypass device (22) is activated, the second filter element (32), immediately following in the direction of flow, filters the medium. The second filter element thus takes over the main filtration of the medium on actuation and operation of the bypass device, since the first filter element is essentially no longer available for a filtration process due to the bypass device.

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