Tie with hinged end plates

Details Tie with hinged end plates Tie with hinged end plates

1999-05-13

2001-05-01

Callo, Laura A. (Department: 3635)

Static molds

Miscellaneous mold adjuncts

In situ construction engineering or building type

C249S040000, C249S041000, C249S190000, C249S191000, C249S213000, C052S426000, C052S562000, C052S700000, C052S714000, C411S340000

Reexamination Certificate

active

06224031

ABSTRACT:

CROSS-REFERENCES TO RELATED APPLICATIONS
(Not applicable).
STATEMENT AS TO RIGHTS TO INVENTIONS MADE UNDER FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT
(Not applicable).
BACKGROUND OF THE INVENTION
(1) Field of the Invention
The present invention relates generally to ties for connecting form panels to create a poured concrete wall system, and more particularly to an improved tie which is, mechanically operable to be inserted through a form panel and then manipulated to retain the form panel in position.
(2) Background Information
A popular wall forming system utilizes expanded polystyrene panels as forms for poured concrete walls. After the concrete has hardened, the panels may be left in place on the walls to serve as permanent insulation, or they may be stripped off to reveal the exposed concrete and permit reuse of the form panels.
Initially, these lightweight form systems utilize elongated one foot high sheets with tie slots formed along the upper and lower edges. The panels then were connected by plastic ties, both in parallel, and stacked vertically.
One problem with most previous tie designs was in a situation where a large four foot by eight foot panel is desired to be used as the form. Because most previous tie designs were utilized in slots along the upper and lower edges, it was not possible to insert a tie intermediate the edges of the panel, without creating large holes in the panel.
Another problem with prior art forming systems was in the use of ties which would retain the insulation panel permanently on the wall. Such systems were not capable of use on those occasions where an exposed concrete surface is desired, or where reuse of the form panels is necessary.
BRIEF SUMMARY OF THE INVENTION
It is therefore a general object of the present invention to provide an improved tie for use with polystyrene sheets used as form panels for poured concreted walls.
Another object of the present invention is to provide a tie which may be inserted through the intermediate portion of a polystyrene form panel to retain the form panel in position.
A further object is to provide a concrete wall form tie which has an end plate which may be removed to permit removal of the form panel after the concrete has cured.
These and other objects of the present invention will be apparent to those skilled in the art.
The tie of the present invention includes an elongated strap with an end plate pivotally connected at each end of the strap, permitting the end plate to be pivoted from a position generally orthogonal to the strap, to a position generally parallel to the strap. Once an end plate is pivoted to a position parallel to the strap, the end plate can be pushed through a polystyrene form panel to project therefrom. The end plate is then pivoted to the position orthogonal to the strap, and pulled into engagement with the outward face of the form panel. The second end plate on the tie is pivoted, pushed through a second form panel, pivoted to the orthogonal position, and thence the second form panel is pulled outwardly into contact with the second end plate. In this way, the tie will interconnect a pair of parallel form panels in spaced apart position, to receive poured concrete therebetween.


REFERENCES:
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patent: 4865501 (1989-09-01), Ferris
patent: 5039058 (1991-08-01), Boeshart
patent: 5226767 (1993-07-01), Foerster, Jr.
patent: 5890337 (1999-04-01), Boeshart

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