Electrically-operated tacker

Details Electrically-operated tacker Electrically-operated tacker

1990-04-23

1991-04-02

Bell, Paul A.

Elongated-member-driving apparatus

With interlock means

227131, 227146, 227156, B25C 106

Patent

active

050041401

ABSTRACT:
An elecrically-operated tacker includes means for driving a tack which is urged toward a muzzle section by a spring, an operating means for moving the driving means back to a starting position, a switch having a push button, a trigger means having a pair of first and second depressing elements, a control member for maintaining the first depressing element in an operative position, a safety means for normally maintaining the control member in a safety position, first and second engaging elements provided on the operating means, third, fourth and fifth engaging elements on the driving means, and a release means. Initially the driving means is located in a starting position immediately before a first extreme position. When the trigger is depressed, the push button is depressed by the first depressing element to move the driving means for a slight distance to the first extreme position so that the driving means springs to the second extreme position by the action of the spring to drive a tack. At substantially the same time that the driving means springs to the second extreme position, the first depressing element is forced out of the engagement with the push button. However, before the first depressing element is disengaged therefrom, the second depressing element is allowed to engage with the push button. When the driving means has reached the second extreme position, the second engaging element engages with the third engaging element to move the driving means to a substantially middle position and, then the first engaging element engages with the fourth engaging element to move the driving means to the starting position. At the same time that the driving means reaches the starting position, the release means disengages the second depressing element from the push button of the switch to switch the tacker off.

REFERENCES:
patent: 2575455 (1951-11-01), Lang
patent: 4215808 (1980-08-01), Sollberger et al.
patent: 4724992 (1988-02-01), Ohmori
patent: 4807793 (1989-02-01), Ghibely
patent: 4811885 (1989-03-01), Lai
patent: 4834278 (1989-05-01), Lin
patent: 4953774 (1990-09-01), Lai

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