Power tools

Details Power tools Power tools

2005-08-23

2005-08-23

Martin, David (Department: 2837)

Electricity: motive power systems

Battery-fed motor systems

C318S432000, C318S434000, C173S178000, C173S181000

Reexamination Certificate

active

06933689

ABSTRACT:
It is an object of the invention to provide a technique to effectively prevent a power tool from being adversely affected when a battery is removed from the power tool. According to the present invention, a power tool is provided that includes a tool bit, a motor that drives the tool bit, a body that houses the motor, a battery detachably coupled to the body so as to supply driving current to operate the motor, and a battery removal preventing device. Within the power tool, the battery removal preventing device prevents the battery from being removed from the body during operation of the motor and allows the battery to be removed from the body only when the motor is stopped. As a result, arc can be effectively prevented from being generated between the battery and the body of the power tool.

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