Rotary engine oil tank vent

Claim 2

A rotary engine including a pair of end housings and a crankshaft rotatably supported in said end housings and an annular end cover received about said crankshaft normally covering an oil supplied cavity on the outboard side of one of said end housings, said one end housing having located underneath a drain-vent hole to which oil drains and through which air can be vented into the engine and also having located underneath a suction-vent hole through which oil can be supplied to the engine''s lubrication system and also through which air may be vented into the engine, an oil tank secured to said engine in an underneath location, said oil tank having a drain-vent hole sealingly connected to the drain-vent hole in said one end housing, said oil tank also having a suction-vent hole sealingly connected to the suction-vent hole in said one end housing, suction passage means extending from said oil tank through said suction-vent holes into said engine, vent passage means also extending from said oil tank through said suction-vent holes into said engine, said end cover having a wall cooperating with said end housing on the outboard side to provide a quiet zone shielded from said oil supplied cavity elevated above said oil tank, an upwardly extending elongated vent passage in said one end housing connecting said vent passage means to said quiet zone at a low location, and another vent passage in said one end housing connecting said quiet zone at a high location to the engine''s internal breathing system at a place away from any oil drainage.

Claim 3

A rotary engine including a pair of end housings and a crankshaft rotatably supported in said end housings and an annular end cover received about said crankshaft normally covering an oil supplied cavity in an annular projection on the outboard side of one of said end housings, said one end housing having located underneath a drain-vent hole to which oil drains and through which air can be vented into the engine and also having located underneath a suction-vent hole through which oil can be supplied to the engine''s lubrication system and also through which air may be vented into The engine, an oil tank secured to said engine in an underneath location, said oil tank having a drain-vent hole sealingly connected to the drain-vent hole in said one end housing, said oil tank also having a suction-vent hole sealingly connected to the suction-vent hole in said one end housing, suction passage means extending from said oil tank through said suction-vent holes into said engine, said suction passage means and said oil tank around said oil tank suction-vent hole providing an annular vent passage about said suction passage means open to said oil tank, said end cover having an inwardly extending wall with a circumferentially extending face engaging the outboard side of said end housing and radially outwardly extending ends extending to said annular projection to provide a quiet zone shielded from said oil supplied cavity elevated above said oil tank, an upwardly extending elongated vent passage in said one end housing connecting said vent passage to said quiet zone at a low location, and another vent passage in said one end housing connecting said quiet zone at a high location and in a transverse direction to the engine''s internal breathing system at a place away from any oil drainage.

Claim 4

A rotary engine including a pair of end housings and a crankshaft rotatably supported in said end housings and an annular end cover received about said crankshaft normally covering an oil supplied cavity in an annular projection on the outboard side of one of said end housings, said one end housing having located underneath a drain-vent hole to which oil drains and through which air can be vented into the engine and also having located underneath a suction-vent hole through which oil can be supplied to the engine''s lubrication system and also through which air may be vented into The engine, an oil tank secured to said engine in an underneath location, said oil tank having a drain-vent hole sealingly connected to the drain-vent hole in said one end housing, said oil tank also having a suction-vent hole sealingly connected to the suction-vent hole in said one end housing, suction passage means extending from said oil tank through said suction-vent holes into said engine, said suction passage means and said oil tank around said oil tank suction-vent hole providing an annular vent passage about said suction passage means open to said oil tank, said end cover having an inwardly extending wall with a circumferentially extending face engaging the outboard side of said end housing and radially outwardly extending ends extending to said annular projection to provide a quiet zone shielded from said oil supplied cavity elevated above said oil tank, an upwardly extending elongated vent passage in said one end housing connecting said vent passage to said quiet zone at a low location, and another vent passage in said one end housing connecting said quiet zone at a high location and in a transverse direction to the engine''s internal breathing system at a place away from any oil drainage.