Control arrangement for electro-mechanical tool

Details Control arrangement for electro-mechanical tool Control arrangement for electro-mechanical tool

1979-08-31

1981-11-03

Bell, Paul A.

Tool driving or impacting

Drive controlled by relative axial movement of tool

173 15, 227 7, 227131, B25C 106

Patent

active

042980720

ABSTRACT:
A control arrangement for an electro-mechanical tool is disclosed. The tool may, for example, be a nailer or stapler, and is provided with an impact member which is frictionally moved in a working stroke by means of an electrically driven flywheel, which presses the impact member against the support element, which may be a counter-rotating flywheel. A solenoid is provided to move the impact member into the bite between the flywheel and support element. A trigger actuated switch and a safety switch actuated by contact of the tool with the workpiece must both be actuated in order to energize the solenoid. Circuitry is disclosed which makes possible the energization of the solenoid by closing both switches in any order, or in a desired particular order, and makes possible the provision of a time delay safety.

REFERENCES:
patent: 3612379 (1971-10-01), Panock
patent: 3661312 (1972-05-01), Pomernacki
patent: 3964659 (1976-06-01), Eiben et al.
patent: 4121745 (1978-10-01), Smith et al.
patent: 4129240 (1978-12-01), Geist
patent: 4204622 (1980-05-01), Smith et al.

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