Plastic and nonmetallic article shaping or treating: processes – Treatment of material by vibrating – jarring – or agitating... – By reciprocating or vibrating mold
Patent
1986-12-23
1988-07-19
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Treatment of material by vibrating, jarring, or agitating...
By reciprocating or vibrating mold
264228, 264229, 2642979, 264DIG43, 425111, B28B 108, B28B 708, B28B 2306, B29C 6712
Patent
active
047583932
ABSTRACT:
A process for making beams of prestressed concrete in an assembly for casting and curing beams of prestressed reinforced concrete, having an individual prestress frame allowing tensioning of longitudinal reinforcements between two fixed end elements maintained in spaced-apart relationship by longitudinal elements; and an individual impression cooperating hermetically with the frame so that the walls of the impression and the walls of the end elements of the frame, connected together, form the sides of a mould receiving the cast concrete, the impression being adapted to be separated from the frame without detensioning of the reinforcements.
REFERENCES:
patent: 2236107 (1941-03-01), Miller et al.
patent: 3233027 (1966-02-01), Wennstrom
patent: 3568274 (1971-03-01), Hidden et al.
patent: 3666385 (1972-05-01), Baker
patent: 3810337 (1974-05-01), Pollard
patent: 3891731 (1975-06-01), Williams
patent: 3907951 (1975-09-01), Godley
patent: 4069283 (1978-01-01), Rauchfuss
patent: 4224274 (1980-09-01), Ozawa
patent: 4629408 (1986-12-01), Giron et al.
Cazenave Claude
Decubber Maurice
Kutach Karen D.
Silbaugh Jan H.
Societe Anonyme de Traverses en Beton Arme - Systeme Vagneux
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