Switch for electric power tool

Details Switch for electric power tool Switch for electric power tool

2009-02-24

2009-12-29

Friedhofer, Michael A (Department: 2833)

Electricity: circuit makers and breakers

Solid contact

Push button operated

C200S332200

Reexamination Certificate

active

07638725

ABSTRACT:
A switch for use with an electric power tool equipped with a trigger switch. The trigger switch has first contacts for turning on and off a motor, second contacts for turning on and off a speed controller, and a trigger lever. The first contacts are formed by a first fixed contact formed on a second conductive plate and a first movable contact formed on a swingable movable contact plate located opposite to the first fixed contact. The second contacts are formed by a second fixed contact and a second movable contact mounted opposite to the second fixed contact formed on a first conductive plate. The second movable contact is located around the front end of a slide plate slidably supported on the trigger lever. The second fixed contact and sliding plate portion are arranged parallel to the first fixed contact and the support member.

REFERENCES:
patent: 4241297 (1980-12-01), Piber et al.
patent: 5380971 (1995-01-01), Bittel et al.
patent: 6736220 (2004-05-01), Chan et al.
patent: 6794594 (2004-09-01), Ching
patent: 7297891 (2007-11-01), Omori et al.
patent: 7511240 (2009-03-01), Inagaki et al.
patent: 2003-109451 (2003-04-01), None

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