×

Power tool

  • US 20050057206A1
  • Filed: 09/10/2004
  • Published: 03/17/2005
  • Est. Priority Date: 09/12/2003
  • Status: Active Grant
First Claim
Patent Images

1. A power tool, comprising:

  • a radar for transmitting radio waves towards an area in a vicinity of a rotating tool, and for receiving reflected radio waves reflected from a radio wave reflector existing within the area;

    a means for calculating, from the reflected radio waves received by the radar, a distance between the radio wave reflector and the rotating tool, and a speed of change of the distance;

    a first brake for applying gentle braking to the rotating tool when the calculated distance and speed fulfill a first criterion; and

    a second brake for applying rapid braking to the rotating tool when the calculated distance and speed fulfill a second criterion.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×