Title:
Raise driving apparatus
United States Patent 3085794


Inventors:
Sixten, Johansson Karl
Gustav, Rapp BO.
Application Number:
US2766860A
Publication Date:
04/16/1963
Filing Date:
05/09/1960
Assignee:
BOLIDENS GRUV AB
Primary Class:
Other Classes:
175/86, 182/130, 182/144, 182/148, 299/10, 299/95, 405/138, 405/148
International Classes:
E21D3/00
View Patent Images:
US Patent References:
0959778N/A1910-05-31
0500017N/A1893-06-20
Foreign References:
DE147321C