Tool driving or impacting – Miscellaneous
Reexamination Certificate
2006-08-29
2006-08-29
Huynh, Louis K. (Department: 3721)
Tool driving or impacting
Miscellaneous
C173S148000, C173S114000, C173S122000, C173S132000, C173S128000
Reexamination Certificate
active
07096972
ABSTRACT:
Power tools of the type under consideration include hammer drills, for example, which are electric or battery powered and includes two modes of operation: a rotation mode and a rotation-hammer mode. A manually operable selector lever enables the hammer drill to be selectively operated in one of the two modes by disengaging and engaging a hammer mechanism. In rotation-hammer mode, the drive shaft of the hammer drill rotates a tool element about a rotational axis and oscillates the tool element along a rotational axis. An attachment mountable within the chuck of a hammer drill prevents a tool element from rotating when the hammer drill is operating in rotation-hammer mode. The hammer drill attachment transfers hammer action, but not rotation, to the tool element. The hammer drill attachment enables dual function power tools to be operated in a hammer only mode to perform a function, for example, chiseling.
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Huynh Louis K.
Lopez Michelle
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