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US 4,397,593 AGranted
Tool for cutting openings
OwnerWilliam A. Fordeckinventor
Life of this patent
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Abstract
The invention is a tool for use with a machine tool such as a drill press or the like for cutting circular openings or segments thereof in sheet material. The device includes a pilot drill and an articulated gear train operatively coupling a tool holder and cutting tool to a pilot drill. The articulated gear train is received within a housing which is rotatable about the axis of the pilot drill to enable movement of the cutting tool along an arcuate path about the axis of the pilot drill.
Claims11
A tool for cutting openings in a workpiece comprising:
- a housing;
- an articulated arm received in said housing, said arm having a proximal and distal end and a plurality of sections pivotable about spaced parallel axes, such that the distal one of said axes is movable between positions close to and distal from the proximal one of said axes;
- a plurality of gears journalled in said sections, each said gear being journalled for rotation about a predetermined one of said axes;
- and said gears being operatively meshed in series to form an articulated gear train;
- a pilot drill fixedly connected to the proximal one of said gears for rotation about the respective axis, said drill having a shank portion extending outwardly from said housing and being operatively engageable by a machine tool, said housing being manually rotatable about said drill;
- tool holding means fixedly connected to the distal one of said gears for rotation therewith about the distal one of said axes, whereby said pilot drill is drivingly coupled to said tool holding means;
- and clamping means for fixedly securing said distal section to said housing with said distal axis disposed at a selected spacing from said proximal axis.
4 more elements
Dependencies are inferred from the claim text.