Patent · US Expired

PTFE membrane filter for exhaust air of vacuum toilet system

US6681412B2 · kind B2 · utility

7Cited by

2References

21Claims

0Family size

Assignee

AIRBUS DEUTSCHLAND GMBH · DE

Inventors

Martin Doss · Buxtehude, DE
Wolfgang Erdmann · Buxtehude, DE
Carsten Ohlfest · Glückstadt, DE

Key dates

Filing date	Aug 30, 2002
Grant date	Jan 27, 2004
Priority date	—
Expiry date	Aug 30, 2022

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D53/266
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A filter arrangement for a vacuum toilet system includes a filter element arranged in a filter housing connected to a waste water tank of the vacuum toilet system. The filter element includes a polytetrafluoroethylene (PTFE) filter membrane on the inlet side thereof, a filter support material supporting the PTFE membrane, and a support cage, to form a filter cartridge. The filter is preferably a pleated cylindrical filter with the inlet side on the inside of the cylinder. The arrangement preferably further includes a rinsing nozzle that rinses contaminants from the inlet side surface of the filter element, to flow down into the waste water tank. This rinsing, together with the low adhesion and the surface filtration principle of the PTFE filter membrane, prevent clogging of the filter.

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