Impact wrench for tightening to a desired level

Details Impact wrench for tightening to a desired level Impact wrench for tightening to a desired level

1982-12-27

1986-09-02

Bonck, Rodney H.

192 clutches and power-stop control

Stop mechanism

Limit stop

173 12, 192150, B23Q 506, F16D 4320

Patent

active

046090894

ABSTRACT:
An impact wrench including a hammer and an anvil to which impacts are imparted by the hammer, the impact wrench comprising a pair of sensors located at a stationary section of the wrench wherein the sensors are electrically arranged so as to have different phases, the sensors being to detect the rebounds occurring on the anvil, a second sensor adapted to detect an angular displacement of the anvil from a time when the rebounds detected by the first sensors exceed a predetermined value, and means for stopping the motor.

REFERENCES:
patent: 2543979 (1951-03-01), Maurer
patent: 3572447 (1971-03-01), Pauley et al.
patent: 3608131 (1971-09-01), Hornschuch et al.
patent: 3948328 (1976-04-01), Hiraoka et al.
patent: 4185701 (1980-01-01), Boys

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