Title: Earth boring auger

Abstract: An earth boring auger having a shaft and helical flights thereon and a plurality of disc cutters mounted below the flights and behind the leading edge thereof to engage the formation before it is engaged by the flights.

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Inventors: Robbins, Leonard J. (Pottsboro, TX, US)
Stewart, Lloyd D. (Dennison, TX, US)

Application Number: 641041
Filing Date: 1975-12-15
Publication_date: 1976-12-21
Assignee: Reed Tool Company (Houston, TX)
Primary Class(es): 175/335 175/351, 175/394
Other Classes:
US Patent Ref:

850533	Apr, 1907	Litaker	175/335.
893950	Jul, 1908	Thomas	175/394.
1136203	Apr, 1915	Bardeen	175/336.
1640644	Aug, 1927	Bullum	175/394.
1719546	Jul, 1929	Hallett	175/394.
2380112	Jul, 1945	Kinnear	175/336.
2823025	Feb, 1958	Biedess	175/335.
3094179	Jun, 1963	Lines	175/394.
3905432	Sep, 1975	Mullins	175/394.

Other Refs:
Primary Examiner: Leppink, James A.
Assistant Examiner: Favreau, Richard E.
Attorney: Mosely; Neal J.