Switch-locking mechanism for screw tightener

Details Switch-locking mechanism for screw tightener Switch-locking mechanism for screw tightener

1995-08-28

1997-08-05

Smith, Scott A.

Tool driving or impacting

Means to drive tool about an axis

Electric motor

173170, 173171, H01H 920

Patent

active

056532962

ABSTRACT:
A switch-locking mechanism in a screw tightener in which a motor for rotating a driver bit is activated by pulling a trigger, includes: a mating projection provided on the trigger; a trigger block slidably accommodating the trigger in part such that the mating projection of the trigger is positioned in the trigger block, the trigger block being fixed to the screw tightener body; a first spring urging the trigger in a opposite direction to the trigger pulling direction at all times; and a slide locker operative in a direction perpendicular to the trigger pulling direction, the slide locker having a locking projection movable in and out the moving locus of the mating projection of the trigger.

REFERENCES:
patent: 3632936 (1972-01-01), Piber
patent: 3746813 (1973-07-01), Brown
patent: 3746815 (1973-07-01), Drummer

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