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Anti-kickback power tool control

  • US 4,267,914 A
  • Filed: 04/26/1979
  • Issued: 05/19/1981
  • Est. Priority Date: 04/26/1979
  • Status: Expired due to Term
First Claim
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1. In a power tool of the type having an implement driven by a motive power source, the improvement of a system for detecting an impending kickback condition in the power tool comprising:

  • (a) monitoring means for monitoring the speed of a predetermined part of the power tool;

    (b) means connected to said monitoring means for determining the rate of change of the monitored speed; and

    (c) means for producing a predetermined response when said rate of change attains a determinable value.

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