Cutting by use of rotating axially moving tool – With work-engaging structure other than tool or tool-support – Having tool-opposing – work-engaging surface
Patent
1986-01-10
1987-06-02
Weidenfeld, Gil
Cutting by use of rotating axially moving tool
With work-engaging structure other than tool or tool-support
Having tool-opposing, work-engaging surface
144108, 408 87, 408 95, 408103, B23B 4100, B23B 4514
Patent
active
046699295
ABSTRACT:
A drilling apparatus especially useful in drilling holes in wooden joists and studs, through which plumbing and electrical cables are to be routed, includes a bracket for engaging a joist or stud and a movable carriage supporting an electric motor and drill bit. A lever mechanism moves the carriage, and hence the motor and drill bit forcibly toward the bracket, forcing the drill bit through the joist. Countertorque from the drill bit is resisted by the coaction of the bracket and the drill bit in the hole being drilled. This avoids possible loss of balance by the operator.
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Bishop Steven C.
Weidenfeld Gil
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