Static molds – In situ construction engineering type or building type-mold... – Forming hydraulic and earth control type product in situ
Patent
1979-07-24
1981-04-14
Hoag, W. E.
Static molds
In situ construction engineering type or building type-mold...
Forming hydraulic and earth control type product in situ
405150, 425 59, 425 62, B28B 702, B29C 100
Patent
active
042615429
ABSTRACT:
This invention relates to U-shaped tunnel-type forms for poured concrete having an upper horizontal panel resting on two spaced vertical sides which, in turn, are separated on the ground by a combination of jacks and wheels. The bottom portions of the two sides are connected by plural horizontal retractile tie beams. The upper horizontsl panel is supported by articulated horizontal beams pivotal at their ends and in the middle to permit the panel to be deformed by curving it downward, thereby pulling toward each other the spaced corners or edges of the dihedrons formed by the junctures of the spaced vertical sides and the horizontal panel. The improved form or coffering is characterized by the combination of plural articulated supporting beams for the horizontal panel supported by lengthwise adjustable inclined braces, axles having capacity for axial displacement relative to their wheels, but which are retractable automatically back to their median position by springs disposed on each side of the wheels, and lengthwise adjustable horizontal tie beams connecting the lower portions of the sides of the structure.
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Hoag W. E.
Outinord-St.-Amand, S.A.
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