US Patent: 60,342
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Improvement in Tap Borers
Tap Borer & Reamer
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Patentee:
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| Silas S. Crocker (exact or similar names) - Maquoketa, IA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Dec. 11, 1866 |
USPTO (New site tip)
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Jeff Joslin (dm)
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Description: |
| The focus of this patent is on "... a volute-shaped tool formed of a single curved plate, whose salient edge is sharpened for the purpose of reaming out a conical hole ..." The tool can have a threaded portion at the tip for use in bung-hole and tap boring, but would serve no purpose when boring hubs to take boxes. |
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