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Walk-behind power equipment unit having all-wheel drive control system

  • US 9,677,648 B2
  • Filed: 01/06/2016
  • Issued: 06/13/2017
  • Est. Priority Date: 01/14/2015
  • Status: Active Grant
First Claim
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1. An all-wheel drive power equipment unit comprising:

  • a housing comprising front wheels and rear wheels, wherein a front transmission is adapted to selectively provide driving power to the front wheels, and a rear transmission is adapted to selectively provide driving power to the rear wheels;

    a variable speed input device;

    a first connection element operatively connected to the rear transmission, the first connection element adapted to selectively actuate the rear transmission from a neutral state to an engaged state in response to manipulation of the speed input device;

    a second connection element connected to the front transmission, the second connection element adapted to selectively actuate the front transmission from a neutral state to an engaged state in response to the manipulation of the speed input device;

    a mechanical load balancer comprising;

    an input connected to the variable speed input device;

    a first output connected to the first connection element; and

    a second output connected to the second connection element, wherein the load balancer is adapted to distribute a force applied at the input equally between the first output and the second output; and

    a resistance element associated with the front transmission, the resistance element defining a second force resisting actuation of the front transmission, wherein the second force is greater than a first force resisting actuation of the rear transmission.

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