Internal-combustion engines – Two-cycle – Rear compression
Reexamination Certificate
2007-05-01
2007-05-01
Kamen, Noah P. (Department: 3747)
Internal-combustion engines
Two-cycle
Rear compression
C123S0730DA, C123S0730SC, C123S0730PP
Reexamination Certificate
active
11506334
ABSTRACT:
A two-stroke internal combustion engine includes dual transfer passages in gaseous communication between a crankcase chamber and a combustion chamber of the engine, an air passage through the crankcase to the crankcase chamber and in gaseous communication with a carburetor of the engine. A rotatable circular disk or crank-web is rotatably connected to a crankshaft. A piston may be used to open and close a top end of the passages. An air inlet port to the transfer passage for stratified scavenging is opened and closed by the crank-web that has passages and cutouts. The rotary valve replaces the one-way reed valve used in stratified scavenged and charged two-stroke engines. The air passes from lower ends of the transfer passages to top ends and into the crankcase through a piston passage, through the adjacent transfer passages directly, or through a passage in the piston into the crankcase.
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Mavinahally Nagesh S.
Veerathappa Jay S.
Kamen Noah P.
Rosen Steven J.
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