Apparatus for jacking tunnels
United States Patent 2967401
US Patent References:
/0236348.html
- - 0236348

/0277049.html
- - 0277049

/1221723.html
- - 1221723

/1325053.html
- - 1325053

Apparatus and method for installing pipe
- - 1948707


Inventors:
Washabaugh, Edward P.
Publication Date:
01/10/1961
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Assignee:
AMERICAN MARIETTA CO
Primary Class:
405/144
Other Classes:
405/146
International Classes:
E21D9/00
US Patent References:
1948733Apparatus for installing and guiding pipe or the like
2074003Method of culverting embankments
2197374Tunnel construction
2325565Installation of underground ducts
2656683Method of installing underground pipes or ducts
Foreign References:
FR927975A
DE837245C