Plastic and nonmetallic article shaping or treating: processes – Forming stressed concrete articles
Patent
1976-08-18
1978-09-12
Pavelko, Thomas P.
Plastic and nonmetallic article shaping or treating: processes
Forming stressed concrete articles
138176, 264256, 264311, B28B 2310, B28B 2312, F16L 908
Patent
active
041138236
ABSTRACT:
A method of manufacturing prestressed concrete pipe which comprises arranging a reinforcing cage in a form, casting expansive concrete within the form in such a manner that the reinforcing cage is disposed outwardly of the center of the wall thickness of the concrete layer, and then forming the pipe centrifugally.
REFERENCES:
patent: 3467144 (1969-09-01), Rice
patent: 3654968 (1972-04-01), Mizuma
Nippon Hume Pipe Company Limited
Pavelko Thomas P.
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