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Title:
Auger-type drill bit
United States Patent 2578593
Inventors:
Orville, Phipps
Application Number:
US70636546A
Publication Date:
12/11/1951
Filing Date:
10/29/1946
Assignee:
Orville, Phipps
Primary Class:
Other Classes:
175/323, 175/421, 175/426
International Classes:
E21B10/54
View Patent Images:
US Patent References:
2532783Self-piloted rotary drill bit1950-12-05
2464781Rotary percussion drill1949-03-22
2461305Rotary bit for drilling coal and rock1949-02-08
2339104Drill bit1944-01-11
2294004Demountable drill bit1942-08-25
2239461Rock boring bit1941-04-22
2101376Percussive boring tool1937-12-07
1387733Well-drilling bit1921-08-16
0991830N/A1911-05-09
0923514N/A1909-06-01
0923513N/A1909-06-01
Foreign References:
GB375596A1932-06-30
GB409385A1934-04-30
GB472587A1937-09-27
GB500147A1939-02-03
GB518747A1940-03-06
GB528593A1940-11-01