Power driven screwdriver

Details Power driven screwdriver Power driven screwdriver

1992-10-08

1993-05-11

Watts, Douglas D.

Tool driving or impacting

Automatic control of power operated means

Drive means responsive to torque or speed condition

81429, 81 583, 192 56R, B25B 2300

Patent

active

052093085

ABSTRACT:
A power driven screwdriver includes a device interposed between a spindle and a housing for preventing rotation of the spindle. The device includes a first member and a second member. The first member is disposed on the spindle and is rotatable therewith. The second member is fixed to the housing and axially opposed to the first member. The first and the second members include a first conical surface and a second conical surface, respectively. The first and the second conical surfaces have central axes parallel to a central axis of the spindle, respectively, and are opposed to each other. At least one of the central axes of the first and the second conical surfaces is displaced from the central axis of the spindle. The first conical surface contacts the second surface when the spindle is positioned at a first position where a clutch mechanism disconnects the spindle from a motor.

REFERENCES:
patent: 3454059 (1969-07-01), Sindelar
patent: 4630512 (1986-12-01), Durr
patent: 4647260 (1987-03-01), O'Hara et al.
patent: 4691786 (1987-09-01), Fujita et al.
patent: 4809572 (1989-03-01), Sasaki
patent: 5054588 (1991-10-01), Thorp et al.

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