Cutting by use of rotating axially moving tool – With work-engaging structure other than tool or tool-support – Movable relative to tool along tool-axis
Patent
1987-07-13
1988-04-26
Weidenfeld, Gil
Cutting by use of rotating axially moving tool
With work-engaging structure other than tool or tool-support
Movable relative to tool along tool-axis
74105, 74520, 408136, 408712, B23B 4514
Patent
active
047401192
ABSTRACT:
A dual, mirror-image lever and linkage assembly of a drill control mechanism advances the bit of the drill toward and away from a workpiece while retaining the bit at a true perpendicular orientation relative to the outer surface of the workpiece. Each linkage and lever assembly includes two levers which are arranged to provide a compound action and which are pivotally interconnected to a base by means of respective links which spread apart from each other as the levers are buckled to advance the bit toward the workpiece. The drill is releasably carried by a support that is fixed on each side to two guide pins that slide along a slot of a guide track which is secured to the base at a location between the two links. During advancement of the bit toward the workpiece, a handle region of one of the levers is moved toward the operator in order to provide enhanced perception of the rate of advancement of the bit which is particularly advantageous when drilling, for example, through safes.
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Bishop Steven C.
Weidenfeld Gil
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