04267914 is referenced by 161 patents and cites 10 patents.

An impending kickback condition is the operation of a power tool or machine tool system is sensed and used to control or eliminate the kickback. The ability to sense an impending kickback condition can be used in all categories of power driven tools. The change in force applied to the power driven tool or other implement is monitored by measuring the rate of change of speed of the tool or implement, and if the speed is decreasing, the rate of change of speed is compared with a threshold value which may be either preset or variable. If this threshold value is exceeded, an output control signal is generated which inhibits the coupling of power to the tool or other implement and/or applies a brake to stop the tool or implement. In order for power to once again be coupled from the motive power source to the shaft, the start switch must be opened and then reclosed or some other signal provided by the operator or another predetermined condition must be met.

Title
Anti-kickback power tool control
Application Number
6/33661
Publication Number
4267914
Application Date
April 26, 1979
Publication Date
May 19, 1981
Inventor
David A Saar
Timonium
MD, US
Agent
Harold Weinstein
Edward D Murphy
Leonard Bloom
Assignee
Black & Decker
DE, US
IPC
F16D 67/02
F16D 43/24
F16D 43/20
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