Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first  previous  back  next  last
US Patent: 3,899
Single-Twist Auger, Gimlet, &c.
Patentee:
William N. Clark (exact or similar names) - Chester, CT

USPTO Classifications:
408/204, 408/210, 417/526

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Ely Warner
Jonathan Warner

Patent Dates:
Granted: Jan. 31, 1845

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin (dm)
Description:
Patent claim has to do with the inner and upper surfaces of the twist being concave, rather than convex. The purpose is to allow the chips to rise up through the bit more freely, especially an advantage while boring deep holes.

Copyright © 2002-2024 - DATAMP