Hammer drill with selective lock-on
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United States of America Patent
Stats
-
Jul 15, 2008
Grant Date -
Aug 24, 2006
app pub date -
Feb 23, 2006
filing date -
Feb 24, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A hammer drill comprising: a motor; a drive transmission capable of operating in at in at least a rotary mode and a reciprocating mode; a mode change mechanism; a switch which, when closed, provides power to the motor; and a mechanical lock-on mechanism which, when locked mechanically holds the switch closed to maintain the power to the motor. Additionally, the hammer drill includes a first sensor, which indicates the mode of operation of drive transmission; and a second sensor which indicates whether the lock-on mechanism is locked; and a controller which is capable of interfering with the operation of the motor, when the controller detects that the drive transmission is in the rotary mode of operation and the lock-on mechanism has been locked.
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