COMPACT PANEL LIKE AIR FILTER CARTRIDGE WITH IMPROVED EFFICIENCY FOR I.C. MOTORS

摘要

1. Panel-like air filter cartridge (11) for I.C. motors, comprising a pack (13) of filtering material having a prismatic shape in which an upstream face (15) and a downstream face (17) are defined for inletting the air to be purified and for outletting the air that has been purified, respectively, a polyurethane peripheral gasket (19) defining a corresponding first frame (21) surrounding the downstream face (17), and a second frame (23) surrounding a portion (27) of the cartridge (11) free from filtering material, the first frame (21) and the second frame (23) being coplanar and having a side (25) in common, wherein said downstream face (17) is substantially flat and said upstream face (15) comprises a first flat portion (29) parallel to the downstream face (17) and a second flat portion (31) oblique relative to the downstream face (17) and wherein the area of the second oblique portion (31) of the upstream face (15) is at least equal to the area of the first portion (29) of the upstream face (15).