Electrically-operated driver

Details Electrically-operated driver Electrically-operated driver

1985-11-12

1986-10-21

Jones, Jr., James L.

Tools

Wrench, screwdriver, or driver therefor

Machine

81429, 81469, B25B 1700

Patent

active

046178430

ABSTRACT:
An electrically-operated driver is constructed such that when a screw begins to be driven, axial movements of a bit is transmitted to a switch mounted on a reduction gear, which engages with a shaft of an electric motor, to turn on or off the switch. In the driver, a distance between the switch and a clutch bearing a thrust from the bit is made short so as to eliminate scattering in strokes required for actuating the switch, which scattering would be produced by axial accumulative errors of parts constituting an actuating mechanism for the switch. Accordingly, movements of the bit are transmitted to the switch with certainty to stably start and stop the motor of the electrically-operated driver.

REFERENCES:
patent: 1711520 (1929-05-01), Decker
patent: 2796161 (1957-06-01), Graybill
patent: 2979089 (1961-04-01), Piesker
patent: 3866493 (1975-02-01), Ringerud

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