Device for sensing the direction of rotation of a hand tool...

Tool driving or impacting – Automatic control of power operated means

Reexamination Certificate

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Details

C173S176000, C173S181000, C173S217000, C173S020000, C310S239000, C310S050000, C310S047000, C310S244000, C310S156050, C310S156060, C388S937000, C324S207200

Reexamination Certificate

active

07600577

ABSTRACT:
A device for sensing a direction of rotation of a hand tool having an electric motor, has a rotatably supported brush plate provided in the electric motor and located in different positions depending on a direction of rotation of the electric motor; and at least one sensor which senses the different positions of said brush plate to determine a direction of rotation, wherein said sensor is configured as a contactless sensor.

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patent: 7064462 (2006-06-01), Hempe et al.
patent: 2004/0140724 (2004-07-01), Higuchi
patent: 2007/0164619 (2007-07-01), Greene
patent: 2007/0216241 (2007-09-01), Ortoman et al.
patent: 103 58 569 (2005-07-01), None
patent: 2 557 352 (1985-06-01), None

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