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US 4,761,844 AGranted
Combined hole making and threading tool
OwnerManuel C. Turchaninventor
Life of this patent
Estimating the term…
Abstract
A combination tool is disclosed for drilling a hole in a workpiece on the inward feed of the tool and for threading the hole during retraction of the tool. The tool comprises a straight body with a drill point at the forward end, a shank at the rearward end and a thread-form mill between the drill point and the shank.
Claims7
For use in a machine tool which is adapted to simultaneously rotate a cutting tool about its axis, move the cutting tool axially, and move the axis in an orbital path whereby a point on the axis of the cutting tool may be moved to define a rectilinear path or a helical path, a tool comprising:
- a body having a shank at one end, a hole making means at the other end and a thread making means intermediate said ends,
- and at least one chip removal passage extending from said hole making means through said thread making means,
- said thread making means having a maximum diameter which is no greater than the maximum diameter of said hole making means whereby said thread making means can enter the hole made by the hole making means without interference.
Dependencies are inferred from the claim text.