US 12,071,871 B1
Positive pressure air cleaning apparatus for a crankcase ventilation system
Lucas K. Smith, Lafayette, IN (US); Rodney Allen Lawrence, Frankfort, IN (US); Eric W. Ferguson, Cottage Grove, MN (US); and Ryan R. Stoneman, Hopkins, MN (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Jun. 12, 2023, as Appl. No. 18/208,525.
Int. Cl. F01M 1/04 (2006.01); B01D 46/00 (2022.01); B01D 46/24 (2006.01); B01D 46/88 (2022.01); F01M 13/00 (2006.01)
CPC F01M 13/0033 (2013.01) [B01D 46/0004 (2013.01); B01D 46/0005 (2013.01); B01D 46/0043 (2013.01); B01D 46/0046 (2013.01); B01D 46/0087 (2013.01); B01D 46/2403 (2013.01); B01D 46/88 (2022.01); F01M 13/0011 (2013.01); B01D 2265/024 (2013.01); B01D 2271/02 (2013.01); B01D 2273/30 (2013.01); B01D 2279/35 (2013.01); F01M 2013/0044 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An apparatus for a ventilation system for supplying air to a crankcase of an internal combustion engine, the apparatus comprising:
a housing forming a cavity and having an inlet and an outlet therein, wherein the inlet communicates with the cavity and is offset from a centerline axis of the housing,
an air filter received by the cavity, wherein an outer circumference of the air filter is oriented at an angle that is substantially tangent to a centerline axis of the inlet;
a lid attachable to and removable from the housing for selectively accessing the air filter; and
a pressure relief valve coupled to the housing and in fluid communication with the cavity.