Patent ID: 9528407
Filing Date: 2016-12-27
CPC Classification: F01M

Claim Text:
1. An oil separating device for separating oil from crankcase gas generated in an internal combustion engine, the oil separating device comprising: a first shell, a second shell, a third shell and a fourth shell, the second shell disposed within the first shell, the third shell disposed within the second shell and over the fourth shell, the third shell having a housing, wherein the first shell, the second shell and the third shell are spaced apart from each other so as to define a passage for crankcase gas, the housing having a pair of side walls, a top wall, and a bottom wall so as to define a chamber, the bottom wall having an oil drain; an inlet disposed on a bottom wall of the fourth shell, the first shell, second shell and third shell are spaced apart from each other so form a passage configured to receive the crankcase gas; an outlet disposed on the first shell, the first shell, second shell and third shell are spaced apart from each other so form a passage configured to allow separated gases to exit from the oil separating device; and a chamber having a first oil separation portion and a second oil separation portion, the first oil separation portion in fluid communication with the second oil separation portion and disposed in a side-by-side relationship with the second oil separation portion, the first oil separation portion having a separation chamber having an inner wall, the separation chamber is downstream the inlet and upstream the outlet, the separation chamber further including a first end elevated relative to a second end, the first end and the second end are open so as to form a passage extending along an axis, the first end having a larger diameter than a diameter of the second end, the first and second ends disposed on a respective first and second planes, the first and second planes are generally parallel to each other and orthogonal to the axis, the outlet is disposed downstream the second plane and displaced from both the axial length of the passage and second plane; a dividing wall disposed on a plane generally parallel to the bottom wall, the dividing wall extending between the separation chamber and one of the pair of side walls of the housing and disposed between the top wall and the bottom wall of the housing, the dividing wall including one or more through-holes; and a blocking wall disposed between the dividing wall and the top wall of the housing, the blocking wall having a pair of free ends, the blocking wall disposed on a plane generally parallel to the dividing wall and disposed directly above the one or more through-holes, wherein the crankcase gas enters the separation chamber though the inlet, wherein oil is separated and collects on the inner wall, and crankcase gas exits the second end in the same direction as oil falling along the inner wall, wherein the separated oil drops via gravity and flows to an oil drain, and the gases are carried through the through-holes of the dividing wall so as to impact into the blocking wall wherein oil is again separated from the gases.