Method of and arrangement for controlling the operation of a han

Details Method of and arrangement for controlling the operation of a han Method of and arrangement for controlling the operation of a han

1991-06-21

1992-10-20

Yost, Frank T.

Tool driving or impacting

Processes

173179, 81473, 192 002R, 192 0084, B25B 23157

Patent

active

051562219

ABSTRACT:
An electrical hand-held device, such as a screwdriver or the like, includes an output shaft, a drive motor for driving the same, an actuating coupling for connecting the output shaft with the drive motor, a distance sensor for sensing a coupling position, and a speed controller which, in response to a signal generated by the distance sensor, controls operation of the drive motor. The controller causes the drive motor to accelerate to a high speed and maintain this speed during the screwing process when a rearward pressure is applied to the output shaft and the coupling is in its clutching position.

REFERENCES:
patent: 3896914 (1975-07-01), Konsbruck et al.
patent: 3906819 (1975-09-01), Curtis
patent: 4194608 (1980-03-01), Usui et al.
patent: 4838364 (1989-06-01), Hansson
patent: 4986369 (1991-01-01), Fushiya et al.
patent: 5025903 (1991-06-01), Elligson
patent: 5044234 (1991-09-01), Cheng
patent: 5060733 (1991-10-01), Kress

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