Patent · US Expired

Filtering apparatus for filtering compressed air

US6703937B1 · kind B1 · utility

12Cited by

7References

16Claims

0Family size

Assignee

FESTO AG & CO. · US

Inventors

Jochen Franz · Reutlingen, DE
Gunter Gebauer · Eßlingen, DE

Key dates

Filing date	Apr 18, 2002
Grant date	Mar 9, 2004
Priority date	—
Expiry date	Apr 18, 2022

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D46/46
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A filter device for filtering compressed air having recognition means (24), which render possible recognition of the degree of contamination of the filter means (6) fitted. The recognition means (24) comprise a pressure differential sensor means (25) responsive to the pressure differential at the filter means (6) and a flow rate sensor means (26) responsive to the flow rate. Furthermore there is an electronic evaluating means (27) for linking the detected pressure differential values and the flow rate values to give a condition value relevant for the degree of contamination of the filter means (6) and to be compared with predetermined threshold values.

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