Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first    back  next  last
US Patent: 588,056
Screw Cutting Tool
Patentee:
Frank G. Echols (exact or similar names) - Hartford, CT

USPTO Classifications:
33/199R, 408/218, 470/198

Tool Categories:

Assignees:
None

Manufacturer:
Pratt & Whitney Co. - Hartford, CT

Witnesses:
Fred J. Dole
Henry Bissell

Patent Dates:
Applied: May 08, 1897
Granted: Aug. 10, 1897

Patent Pictures: [ 1 | 2 | 3 ]
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Russ Allen.
"Vintage Machinery" entry for Pratt, Whitney & Co.
Description:
Five flute cutter instead of the standard four flute cutter and addition gaps between the cutting teeth to facilitate lubricant and chip movement. Applicable to both taps and dies. Known example marked: P&W CO.

Frank G. Echols was a manager at the Pratt & Whitney Co.

Copyright © 2002-2024 - DATAMP