Tool driving or impacting – Automatic control of power operated means
Patent
1996-10-28
1999-12-07
Smith, Scott A.
Tool driving or impacting
Automatic control of power operated means
173176, 173217, 173171, B25F 500
Patent
active
059967072
ABSTRACT:
A hand power tool has a machine housing, a drive motor accommodated in the machine housing, a drive train connected with the drive motor and provided with a tool receptacle for rotation of a tool insertable in the tool receptacle, a detecting device for detecting an uncontrolled operation of the hand power tool by detecting a blocking of the tool in a workpiece with a resulting impact-like turning of the machine housing, a blocking device provided for the drive train and releasable by the detecting device, the locking device having a locking toothing arranged in the drive train and a blocking member movably supported in the machine housing and form-lockingly engagable in the locking toothing so as to non-rotatably fix the drive train relative to the machine housing, the detecting device being formed so that it produces an electrical release signal in an uncontrolled operation, the blocking device being releasable by the electrical release signal, and further has electromagnet device actuatable by the release signal so that the locking member is engagable by the electromagnet device into the locking toothing.
REFERENCES:
patent: 3454111 (1969-07-01), Neiss
patent: 4029159 (1977-06-01), Nymann
patent: 4448261 (1984-05-01), Kousek et al.
patent: 5085280 (1992-02-01), Rassieur
patent: 5401124 (1995-03-01), Hettich
patent: 5704435 (1998-01-01), Meyer et al.
Frauhammer Karl
Hellbach Manfred
Klein Manfred
Meixner Gerhard
Schnerring Heinz
Robert & Bosch GmbH
Smith Scott A.
Striker Michael J.
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