Title:
Device for extracting jammed rock drills
United States Patent 3016964


Inventors:
Paul, Schmidt
Application Number:
US70342657A
Publication Date:
01/16/1962
Filing Date:
12/17/1957
Assignee:
Paul, Schmidt
Primary Class:
Other Classes:
91/281, 91/325, 173/132
International Classes:
E21B19/06
View Patent Images:
US Patent References:
2706103Nail extractor1955-04-12
2673071Rock drill1954-03-23
2035156Drill puller1936-03-24
1104946N/A1914-07-28
1014295N/A1912-01-09
Foreign References:
GB191405924A1915-04-09