Title: Hydraulic mining nozzle-air lift device

Abstract: A hydraulic nozzle device for removing soil from the interior and below a hollow structure.

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Inventors: Essmeier, Donald E. (New Orleans, LA, US)

Application Number: 553386
Filing Date: 1975-02-26
Publication_date: 1976-02-17
Assignee: Continental Oil Company (Ponca City, OK)
Primary Class(es): 175/424 175/67
Other Classes:
US Patent Ref:

538073	Apr, 1895	Harris	175/67.
1853379	Apr, 1932	Rotinoff	175/67.
2239610	Apr, 1941	Kuna	175/324.
2660250	Nov, 1953	Gage et al.	166/222.
2931187	Apr, 1960	Perkins	175/67.
3153290	Oct, 1964	Saito	166/222.
3260054	Jul, 1966	Lorenz	175/62.
3262508	Jul, 1966	Price	175/422.
3331456	Jul, 1967	Pittman	166/222.
3597930	Aug, 1971	Rochelle	61/46.

Other Refs:
Primary Examiner: Brown, David H.
Assistant Examiner:
Attorney: