US Patent: 2,811,875 - Twist Drill Having Oil Passages Therein and Method of Construction


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US Patent: 2,811,875

Twist Drill Having Oil Passages Therein and Method of Construction

Patentee:

Stuart A. Cogsdill (exact or similar names) - Orchard Lake, Oakland County, MI

USPTO Classifications:

408/200, 408/714

Tool Categories:

metalworking machines : drilling and boring : drill bits : metalworking twist drills

Assignees:

Cogsdill Twist Drill Co. - Detroit, Wayne County, MI

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Dates:
Applied:	Apr. 11, 1956
Granted:	Nov. 05, 1957

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for Cogsdill Twist Drill Co.

Description:

Claim:

A deburring tool including, in combination, a body having a slot of substantial length on the axis thereof, an aperture extending through the bottom of the slot adjacent to one end thereof, a deburring blade pivoted in the slot having a projecting cutting end extending from the bottom through the aperture to the outside of the body, and a longitudinally extending spring strip having one end fixedly supported within the slot with the opposite end engaging the end of the blade opposite to that having the projecting end, the end of said spring engaging said blade exerting a force thereon substantially perpendicular to the axis of said tool.