Method for switching off a power tool

Details Method for switching off a power tool Method for switching off a power tool

2008-05-13

2008-05-13

Donovan, Lincoln (Department: 2837)

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

C318S461000, C318S275000, C318S458000

Reexamination Certificate

active

07372226

ABSTRACT:
In a method for shutting off a drive motor (12) of a power tool that drives a tool, the drive motor (12) is shut off as a function of a variable threshold value (E1) if the tool jams. The threshold value (E1) is determined in at least one predetermined time interval (T1) as a function of a current load speed (n1) and a no-load speed (n0).

REFERENCES:
patent: 4249117 (1981-02-01), Leukhardt et al.
patent: 4267914 (1981-05-01), Saar
patent: RE33379 (1990-10-01), Bradus
patent: 6479958 (2002-11-01), Thompson et al.

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