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Construction machinery

  • US 6,851,207 B2
  • Filed: 05/16/2001
  • Issued: 02/08/2005
  • Est. Priority Date: 05/23/2000
  • Status: Expired due to Fees
First Claim
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1. A hybrid construction machine comprising:

  • an engine;

    a generator connected to be driven by said engine;

    a battery connected to store surplus electric power from said generator; and

    a plurality of hydraulic pumps for operating a plurality of hydraulic actuators and actuated by separate electric motors connected to receive electric power from said generator, wherein a number of revolutions of each of said electric motors is controlled by a controller, whereby a discharge rate in each of said hydraulic pumps is controlled.

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