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US Patent: 5,487
Hollow auger
Patentee:
David George - Granville, OH

USPTO Classifications:
30/495

Tool Categories:
woodworking tools : hand drills : drill bits : hollow bits

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Samuel Bancroft
Hall Robertson

Patent Dates:
Granted: Mar. 28, 1848

Patent Pictures:
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Description:
The primary claim of this patent concerns a centering point which provides an accurate start while cutting a tenon on the end of a spoke. Once the cut has commenced until the end of the tenon contacts the stop (E), it is backed off slightly and the centering point withdraws, allowing the tube/body of the hollow auger to guide the remainder of the cut.

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