Safety control for power tool

Details Safety control for power tool Safety control for power tool

1993-06-07

1995-03-28

Luebke, Renee S.

Electricity: circuit makers and breakers

Solid contact

Bimodal

200522, H01H 1302

Patent

active

054019281

ABSTRACT:
A safety control for power tool includes a trigger responsive element coupled to the power tool drive apparatus. The trigger responsive element is operative to permit normal trigger movement between on and off positions. In addition, the trigger responsive element responds to excessive force upon the trigger in the on position to initiate a safety shutdown of the power tool drive apparatus. Upon release, the trigger responsive element returns the trigger to the off position without reactivating the power tool drive apparatus. Embodiments are shown for both electrical and internal combustion engine powered tools.

REFERENCES:
patent: 2928921 (1960-03-01), Cranmore
patent: 3117206 (1964-01-01), Bush
patent: 3869690 (1975-03-01), Hickling
patent: 4523065 (1985-06-01), Heggelund
patent: 4667119 (1987-05-01), Holmes

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