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Pivoting balancer system

  • US 4,819,593 A
  • Filed: 04/28/1988
  • Issued: 04/11/1989
  • Est. Priority Date: 04/28/1988
  • Status: Expired due to Fees
First Claim
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1. In an apparatus of the type having a cylinder defining a cylinder axis and a crankcase, a crankshaft rotatably mounted in the crankcase, said crankshaft defining a crankshaft axis substantially normal to said cylinder axis and having a crankpin flanked by a pair of crankarms that connect the crankpin to the crankshaft in eccentrically offset relation to the crankshaft axis, and a piston axially reciprocable in the cylinder and connected with the crankpin, counterbalancing means comprising:

  • a counterbalance weight defining a center of gravity;

    first mounting means for pivotally connecting said counterbalance weight to said crankcase to provide a stationary pivot axis for said weight;

    second mounting means for pivotally connecting said counterbalance weight to said crankshaft to provide reciprocal motion for said weight; and

    the center of gravity of said counterbalance weight being disposed between said cylinder axis and said stationary pivot axis.

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