Two-way pre-stress system and bending device therefor

Details Two-way pre-stress system and bending device therefor Two-way pre-stress system and bending device therefor

2008-06-04

2011-11-08

Ewald, Maria Veronica (Department: 1744)

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

And means to apply stress to preform and uniting in stressed...

C425S123000, C425S125000, C249S050000, C264S228000, C264S229000

Reexamination Certificate

active

08052408

ABSTRACT:
Disclosed is a two-way pre-stress system for applying pre-stress to a member of a structure by a pre-tendon method, the system comprising: a mold for forming the member, the mold having a concrete pouring space; a supporter installed outside the mold; at least one horizontal tendon installed in the mold in a horizontal direction; a horizontal tendon settling device installed at the supporter, for settling the horizontal tendon in the mold; at least one vertical tendon installed in the mold in a vertical direction; a vertical tendon settling device installed at the supporter, for settling the vertical tendons in the mold; and a bending device installed at the supporter and combined with at least one of the vertical tendon, for forming a bent portion in at least one vertical tendon in a deep portion of the member.

REFERENCES:
patent: 2820606 (1958-01-01), Barredo De Valenzuela
patent: 3041702 (1962-07-01), Schwab
patent: 3086273 (1963-04-01), Welborn
patent: 5471812 (1995-12-01), Muller

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