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US Patent: 2,642X
Single twist screw auger
Patentee:
Ezra L'Hommedieu - Norwich, CT

USPTO Classifications:
408/210, 408/214, 408/230

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

Assignees:
None

Manufacturer:
Ezra L'Hommedieu - Norwich, CT

Witnesses:
Eli Warner
Robert C. Peters

Patent Dates:
Granted: Jul. 17, 1816

Patent Pictures:
USPTO pdf tiff
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Description:
L'Hommedieu claims that the cavity of this single-twist auger, being larger than for double-twist augers, allows chips to rise freely regardless of the depth of the bore - subject to the length of the twist. He also claims that this bit will work equally well with or without the lead screw.

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