Blade assembly for a grass cutting mobile robot

  • US 10,021,830 B2
  • Filed: 02/02/2016
  • Issued: 07/17/2018
  • Est. Priority Date: 02/02/2016
  • Status: Active Grant
First Claim
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1. A grass cutting mobile robot comprising:

  • a body; and

    a blade assembly connected to the body and rotatable about a drive axis, the blade assembly comprising;

    two or more blades, wherein, for each of the two or more blades, the blade is rotatably mounted on a mounting axis and includes a cutting portion extending inwardly toward the drive axis from a blade tip; and

    a housing to hold the two or more blades, wherein, for each of the two or more blades, at least a portion of the blade extends upward from the mounting axis, through the housing, and relative to a horizontal ground surface so that, in response to an impact, the portion of the blade is configured to move within the housing towards the drive axis by rotating about the mounting axis of the blade to cause the cutting portion of the blade to move upward relative to the horizontal ground surface toward the body and to reduce a tip radius defined by the blade tip and the drive axis as the blade tip rotates about the drive axis.

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