GB634350A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
Improvements in or relating to augers and like drills
Assignee: Armstrong World Industries Inc
•
Filing: 1947-10-01
•
Granted: —
•
Expires: 1967-10-01
Abstract
Abstract 634,350. Drilling-bits and augers. ARMSTRONG CORK CO. Oct. 1, 1947, No. 26478. Convention date, March 29. [Class 83 (iii)] An auger comprises a single open-helical flute 3 extending from a shank 2, a severing lip 5, which is formed at the end of the flute at the outer periphery thereof and terminates in a keen edge 6 constituting the leading edge of the auger, and a cutting edge 9 disposed to the rear of the lip 5 and formed along the inner surface of said flute. The cutting edge 9 extends unobstructedly through 180 degrees. The lip 5 may be formed on an attached carbide tip.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-23 04:10
CPC Classifications
B; B27; B27G; B27G15/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.