Apparatus for making longitudinally prestressed concrete pipes
United States Patent 3234619
US Patent References:
Method of making form ties
- - 2193078
Method of reinforcing building units
- - 2234663
Method of prestressing reinforced concrete pipes
- - 2582751
Reinforced concrete pipe
- - 2602469
Pipe sections with moulded spigots
- - 2707003
Method of making form ties
- - 2193078
Method of reinforcing building units
- - 2234663
Method of prestressing reinforced concrete pipes
- - 2582751
Reinforced concrete pipe
- - 2602469
Pipe sections with moulded spigots
- - 2707003
Inventors:
Vitz, John E.
Publication Date:
02/15/1966
View Patent Images:
Export Citation:
Assignee:
CEN VI RO PIPE CORP
Primary Class:
Other Classes:
264/228, 249/85, 254/29A, 249/97
International Classes:
B28B21/60; B28B21/00
US Patent References:
Foreign References:
| FR1002565A |