Device switch for electric hand-held tools

Details Device switch for electric hand-held tools Device switch for electric hand-held tools

2005-08-09

2005-08-09

Lee, K. (Department: 2832)

Electricity: circuit makers and breakers

Solid contact

Push button operated

C200S061390

Reexamination Certificate

active

06927353

ABSTRACT:
A device switch (2) for a hand-held tool, particularly for a screw drill or drilling machine, having a control device (50) which is arranged in a switch housing (4), a trigger (6) which is movably supported at the switch housing (4), the rotational speed of a driving motor (52) of the hand-held tool being controlled by the control device (50) depending on the position of the trigger (6) relative to the switch housing (4), and a pressure increasing arrangement (10) with a contacting area (14) on a contacting element (12) which makes pressing contact with a contact region (26) of a mechanical resistance element (24) in a trigger pressure position of the trigger (6) between a zero load position and a full load position, the displacement resistance of the trigger (6) being increased by this mechanical resistance element (24). The contact region (26) is arranged outside the switch housing (4).

REFERENCES:
patent: 3711666 (1973-01-01), Sahrbacker
patent: 4204580 (1980-05-01), Nalley
patent: 4700031 (1987-10-01), Claghorn et al.
patent: 5579902 (1996-12-01), Kress
patent: 6794594 (2004-09-01), Ching
patent: 6803683 (2004-10-01), Bone et al.

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