Balancer shaft arrangement for four-cycle watercraft engine

Details Balancer shaft arrangement for four-cycle watercraft engine Balancer shaft arrangement for four-cycle watercraft engine

1995-01-11

1996-07-23

Kamen, Noah P.

Internal-combustion engines

Vibration compensating device

Balancing arrangement

123195P, F02B 7506

Patent

active

055379680

ABSTRACT:
A compact balancer shaft arrangement for a four-cycle, internal combustion engine includes a pair of opposing balancer shafts driven by an engine crankshaft. Each balancer shaft has a shorter length than the crankshaft with its center of mass longitudinally offset from the midpoint of the crankshaft. The balancer shafts are driven from a lower end of the crankshaft and extend upwardly in a direction parallel to the crankshaft. The short length of the balancer shafts presents a compact assembly and provides space for other engine accessories.

REFERENCES:
patent: 4696267 (1987-09-01), Kohno et al.
patent: 5044333 (1991-09-01), Fuchigami et al.
patent: 5083535 (1992-01-01), Deschler et al.
patent: 5174257 (1992-12-01), Ozawa
patent: 5309877 (1994-05-01), Shigedomi et al.

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