Patent · US Active

Efficiency-improved multiple bellows filter

US8979964B2 · kind B2 · utility

8Cited by

4References

15Claims

0Family size

Assignee

MANN+HUMMEL GmbH · DE

Inventors

Karlheinz Muenkel · Bretten, DE
Markus Kolczyk · Schwäbisch Gmünd, DE
Stefan Becker · Mannheim, DE
Michael Heim · Charlotte, US

Key dates

Filing date	Feb 26, 2009
Grant date	Mar 17, 2015
Priority date	—
Expiry date	Jan 2, 2030

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M35/024
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Filter element or air filter in the configuration of a multiple bellows filter with an increased efficiency for use in internal combustion engines, wherein a folded filter bellows is arranged radially inwardly of another folded filter bellows and the inner folded filter bellows has a greater or deeper fold depth than the outer folded filter bellows.

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