Internal-combustion engines – Four-cycle
Reexamination Certificate
2006-09-12
2006-09-12
Wolfe, Willis R. (Department: 3747)
Internal-combustion engines
Four-cycle
C261S044800
Reexamination Certificate
active
07104252
ABSTRACT:
A four-stroke combustion engine is lubricated by a mixture of lubricant, fuel and air received from a rotary valve type carburetor. A cylinder of the engine houses a reciprocating piston and together they generally define a combustion chamber segregated from a generally sealed cavity which contains a mechanism for operating intake and exhaust valves communicating with the combustion chamber. Generally non-burning lubricant along with fuel-and-air enters the combustion chamber from the rotary-type carburetor and blows-by the piston into the sealed cavity through a clearance defined generally between the cylinder and piston for cooling the engine and lubricating the mechanical linkage assembly. Preferably, the sealed cavity is vented directly into a rotary throttle valve of the carburetor for controlled flow back into the engine without use of a check valve, enhanced idling characteristics of the engine and substantially reduced spit-back through the carburetor air inlet.
REFERENCES:
patent: 6199532 (2001-03-01), Haberlein et al.
patent: 6394425 (2002-05-01), Nagata
patent: 6585235 (2003-07-01), Pattullo
patent: 6827337 (2004-12-01), Terakado
patent: 6877474 (2005-04-01), Radel
patent: 2004/0182355 (2004-09-01), Kawamoto et al.
Ali Hyder
Reising Ethington Barnes Kisselle P.C.
Walbro Engine Management , L.L.C.
Wolfe Willis R.
LandOfFree
Crankcase venting rotary valve carburetor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Crankcase venting rotary valve carburetor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Crankcase venting rotary valve carburetor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3576742