Patent · US Active

Filter medium of a filter element, filter element and method for producing a filter medium

US9895637B2 · kind B2 · utility

1Cited by

14References

9Claims

0Family size

Assignee

MANN+HUMMEL GmbH · DE

Inventors

Sebastian Neubauer · Ebern, DE
Jochen Reyinger · Waiblingen, DE
Heiko Wyhler · Stuttgart, DE

Key dates

Filing date	Sep 12, 2012
Grant date	Feb 20, 2018
Priority date	—
Expiry date	Mar 6, 2035

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2239/1233
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A filter medium of a filter element for filtering a fluid has at least one nonwoven filter layer of synthetic individual fibers. The filter layer has an increasing level of compression in a flow direction of a fluid passing through the filter medium. The filter medium has a degree of separation for particles to be filtered that increases in the flow direction of the fluid through the filter medium. The filter medium is used in a filter element for filtering fluids such as fuel or air. In a method for producing the filter medium, the synthetic fibers are deposited on a support surface in such a way that an increasing level of compression is created in a direction toward the support surface by gravity and suction acting on the fibers.

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