Motor vehicles – Including one or more ski-like or runner members – With at least one surface-engaging propulsion element
Reexamination Certificate
2005-04-19
2005-04-19
Winner, Tony (Department: 3611)
Motor vehicles
Including one or more ski-like or runner members
With at least one surface-engaging propulsion element
C123S192200
Reexamination Certificate
active
06880659
ABSTRACT:
A snowmobile including a frame assembly and a drive assembly coupled to the frame assembly. The drive assembly including a drive belt adapted to contact a ground surface to propel the snowmobile over the ground surface. An engine is supported by the frame assembly and includes an engine body. The engine body includes a crankcase, a crankshaft rotatably journaled within the crankcase for rotation about a crankshaft axis, and a cylinder block assembly extending in an upward direction from the crankcase. The cylinder block assembly defines at least one cylinder bore adapted to support a piston for a reciprocal motion along a bore axis. A balancer shaft is rotatably coupled to the crankshaft and supported by the engine body for rotation about a balancer shaft axis. The cylinder assembly is canted such that the bore axis is inclined to rearwardly from a vertical axis and the balancer shaft axis is disposed above the crankshaft axis. At least a portion of the balancer shaft can be disposed directly above the crankshaft.
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European Search Report of European Patent Application EP 03 019297.
Knobbe Martens Olson & Bear LLP
Winner Tony
Yamaha Hatsudoki Kabushiki Kaisha
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