Tool driving or impacting – Processes
Reexamination Certificate
2006-03-14
2006-03-14
Smith, Scott A. (Department: 3721)
Tool driving or impacting
Processes
C173S002000, C173S176000, C173S178000
Reexamination Certificate
active
07011165
ABSTRACT:
An electric hand tool apparatus (1) for driving a drill-like tool, which carries out an at least partial rotational movement, has within a housing (2), an electric motor (4) without or free of collector and slip ring, the rpm of which can be controlled by motor control electronics (3), wherein an rpm-dependent clutch (5) for transferring the torque is disposed in a force transfer path from the electric motor (4) to a transmission (6). Optionally, to prevent an excessively high twisting of the housing (2), a sensor (7) is evaluated and the rpm of the electric motor (4) is reduced in order to sever the transfer of force by the rpm-dependent clutch (5).
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Bongers-Ambrosius Hans-Werner
Kristen Ferdinand
Abelman ,Frayne & Schwab
Hilti Aktiengesellschaft
Smith Scott A.
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