Internal-combustion engines – Multiple piston – common nonrestrictive combustion chamber – Four-cycle
Reexamination Certificate
2008-09-03
2009-08-25
Kamen, Noah (Department: 3741)
Internal-combustion engines
Multiple piston, common nonrestrictive combustion chamber
Four-cycle
C123S0510BD, C123S05000B, C123S055700
Reexamination Certificate
active
07578267
ABSTRACT:
A two-stroke internal combustion engine is disclosed having opposed cylinders, each cylinder having a pair of opposed pistons, with all the pistons connected to a common central crankshaft. The inboard pistons of each cylinder are connected to the crankshaft with pushrods and the outboard pistons are connected to the crankshaft with pullrods. Each opposed cylinder further comprises an integrated scavenge pump for providing positive intake pressure. This configuration results in a compact engine with a very low profile, in which the free mass forces can be substantially balanced. The engine configuration also allows for asymmetrical timing of the intake and exhaust ports through angular positioning of the journals on the crankshaft.
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Supplemental European Search Report dated Apr. 6, 2009 for related European patent application No. EP04756195; 4 pages total, cited references listed separately.
Supplemental European Search Report dated Apr. 6, 2009 for related European patent application No. EP03718016; 5 pages total, cited references listed separately.
Hofbauer Peter
Tusinean Adrian
Advanced Propulsion Technologies, Inc.
Ganz Law P.C.
Kamen Noah
LandOfFree
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