Title (en)

AIR FILTER UNIT COMPRISING AT LEAST ONE MAIN AIR FILTER AND AN ADDITIONAL AIR FILTER

Title (de)

LUFTFILTEREINHEIT MIT WENIGSTENS EINEM HAUPTLUFTFILTER UND EINEM ZUSATZLUFTFILTER

Title (fr)

ENSEMBLE FILTRE À AIR COMPRENANT AU MOINS UN FILTRE À AIR PRINCIPAL ET UN FILTRE À AIR SUPPLÉMENTAIRE

Publication

EP 2024632 A2 20090218 (DE)

Application

EP 07728222 A 20070418

Priority

• EP 2007053760 W 20070418
• DE 102006025231 A 20060529

Abstract (en)

[origin: WO2007137911A2] The invention relates to an air filter unit (10) comprising at least one main air filter (1) and an additional air filter (2) which is connected to the main air filter (1) by means of an air line (3) and comprises at least one additional filter element. The additional filter element is formed, on the untreated air side of the main air filter (1), by an at least partially porous wall of the air line which is closed on the suction side. Conversely, when the additional filter element is applied to the treated air side, it is arranged inside the air line connected to the main air filter.

IPC 8 full level

F02M 35/04 (2006.01)

CPC (source: EP US)

B01D 46/64 (2022.01 - EP US); F02M 35/024 (2013.01 - EP US); F02M 35/04 (2013.01 - EP US); B01D 2267/40 (2013.01 - EP US); B01D 2279/30 (2013.01 - EP US)

Citation (search report)

See references of WO 2007137911A2

Citation (examination)

WO 2005095783 A1 20051013 - MANN & HUMMEL GMBH [DE], et al

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA HR MK RS

DOCDB simple family (publication)

WO 2007137911 A2 20071206; WO 2007137911 A3 20080228; CN 101454560 A 20090610; CN 101454560 B 20120425; DE 102006025231 A1 20080110; EP 2024632 A2 20090218; US 2010043638 A1 20100225; US 8206480 B2 20120626

DOCDB simple family (application)

EP 2007053760 W 20070418; CN 200780019975 A 20070418; DE 102006025231 A 20060529; EP 07728222 A 20070418; US 30167107 A 20070418