Autonomous lawn mower

  • US 5,204,814 A
  • Filed: 11/13/1990
  • Issued: 04/20/1993
  • Est. Priority Date: 11/13/1990
  • Status: Expired due to Term
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First Claim
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1. An autonomous lawn mower operative to self navigate along a prescribed path in accordance with stored route information compared with information from position markers spaced along the prescribed path comprising:

  • a body for supporting components of the lawn mower;

    a power generation means supported by said body for supplying power to the lawn mower;

    a plurality of wheels supporting said body;

    at least one cutting means driven by said power generation means, with said cutting means extending below said body;

    central processor means mounted on said body which includes stored route information including identity and position information indicative of the identity and position of said spaced position markers;

    sensing means mounted on said body and operative to sense the presence of a position marker and the position of said position marker relative to said body, said sensing means being connected to said central processor means and operating to transmit a data signal to said central processor means when a position marker is sensed, said processor means operating in response to a data signal from said sensing means to compare said data signal with the stored identity and position information for said spaced position markers to determine an actual position, andcontrol means mounted on said body and connected to said central processor means for controlling the movement of the lawn mower along the prescribed path, said central processor means operating to provide a correction signal to said control means in response to a deviation of said actual position from the prescribed path, said control means operating to correct the travel of the lawn mower in response to a deviation signal.

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