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US 6,382,166 B1Granted
Balancing system using reciprocating counterbalance weight
AssigneeBriggs & Stratton Corporation
InventorsDaniel L. Klika, John H. Thiermann
Life of this patent
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Abstract
An engine counterbalancing system has a counterbalance weight that reciprocates in a linear manner in opposition to piston movement. The counterbalance weight is preferably coupled to the crankshaft via two spaced link arms that engage two respective eccentrics of the crankshaft. The counterbalance weight is guided by one or more rails that are formed integrally on the inner surface of the crankcase housing.
Claims13
A balancing system for an internal combustion engine having a crankcase housing and a cylinder bore defining a cylinder axis, the system comprising:
- a crankshaft substantially within the crankcase housing, wherein the cylinder bore is disposed on a first side of the crankshaft;
- a piston disposed in the cylinder bore for reciprocal movement generally along the cylinder axis in response to rotation of the crankshaft;
- a counterbalance weight disposed on a second side of the crankshaft that is generally opposite the first side, said counterbalance weight reciprocating in response to rotation of the crankshaft;
- and
- a rail interconnected with at least one of said counterbalance weight and said crankcase housing such that said rail guides said counterbalance weight during reciprocation of said counterbalance weight.
2 more elements
Dependencies are inferred from the claim text.