US 7,491,253 B2
Engine intake system with accessible, interchangeable air filters
Joseph Wilson, Florissant, Mo. (US)
Assigned to Aerospace Filtrations Systems, Inc., St. Charles, Mo. (US)
Filed on May 31, 2005, as Appl. No. 11/141,630.
Prior Publication US 2009/0007528 A1, Jan. 08, 2009
Int. Cl. F02C 7/052 (2006.01); B64D 33/02 (2006.01)
U.S. Cl. 55—306  [55/337; 55/347; 55/348; 55/456; 55/502; 55/385.1; 55/505; 123/198 E; 60/39.092; 181/276; 244/53 B] 25 Claims
OG exemplary drawing
 
1. A filtering unit which is configured for placement in a passage of an engine air induction system to receive intake air and remove contaminants from the intake air, the filtering unit comprising:
a mounting frame securable in said passage, the mounting frame defining first and second mounting locations;
a first barrier filter panel attachable to the mounting frame at the first mounting location, the first filter having a porous filter media; and
a second barrier filter panel attachable to the mounting frame at the second location, the second filter having a porous filter media;
wherein the first and second filter panels are interchangeably usable, the filter panels being substantially identical in shape and size such that each is attachable to the mounting frame at either of the first or second mounting location.