Overload protection arrangement for a rotatable power tool

Details Overload protection arrangement for a rotatable power tool Overload protection arrangement for a rotatable power tool

2005-03-08

2005-03-08

Lorence, Richard M. (Department: 3681)

192 clutches and power-stop control

Clutches

Plural clutch-assemblage

C192S056420, C173S178000

Reexamination Certificate

active

06863165

ABSTRACT:
An overload protection arrangement for a portable power tool includes a magnetic clutch (5) arranged in a drive train of the power tool between an electromotor (1) and a tool chuck (3), control electronics (6) for controlling the magnetic clutch (5), a self-actuated torque-dependent overload clutch (7) likewise arranged in the drive train, and a sensor (8) for detecting an open condition of the overload clutch (7) upon the overload of the drive train and connected with the control electronics (6).

REFERENCES:
patent: 3240304 (1966-03-01), Wickersham
patent: 3967711 (1976-07-01), Stroezel et al.
patent: 4257147 (1981-03-01), Moss
patent: 4340133 (1982-07-01), Blersch
patent: 5419745 (1995-05-01), Moolenaar et al.
patent: 5868208 (1999-02-01), Peisert et al.
patent: 3428410 (1983-02-01), None
patent: 4119941 (1993-01-01), None

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