Static structures (e.g. – buildings) – With synthetic resinous component – Foam
Reexamination Certificate
2003-02-14
2004-12-07
Friedman, Carl D. (Department: 3635)
Static structures (e.g., buildings)
With synthetic resinous component
Foam
C052S309120, C052S426000, C052S428000
Reexamination Certificate
active
06826880
ABSTRACT:
FIELD OF THE INVENTION
The present invention is directed to a concrete form assembly of panels which are spaced apart to form walls into which concrete is poured for construction purposes. More particularly, the present invention is directed to corner assemblies to support the panels.
BACKGROUND OF THE INVENTION
It is known that insulated polystyrene panels may be joined together to form walls which are interconnected with bridges so that two parallel walls are formed into which concrete may be poured for construction purposes. The parent application discloses prior art related to the blocks, inserts and bridges used in the construction of walls to retain the concrete.
The prior art has habitually resorted to the use of molded polystyrene corner pieces which, unfortunately, do not have the desired rigidity, strength and dimensional stability. The expanded needs to shrink or keep over time, especially during adverse weather conditions in storage. Nor can their respective dihedral angles be quickly changed without requiring the production of new molds, which is time consuming and expensive.
During this type of construction, it has been found that the weakest structural features occur at the corners where panels are disposed at angles to one another. The internal bracing does not fully support the forces of pressure applied to the corners when concrete is poured. It is frequently necessary to provide external bracing to the corners to prevent sag, deformation, separation or blowout of ht panels at the corners.
Holman, in U.S. Pat. No. 878,000, used two sides between which concrete was poured. Corner braces were employed to connect the two sides at the corners. In U.S. Pat. No. 1,240,436, Gendron et al formed two concrete walls with a hollow space between the walls. Sheet metal corner abutments were used at the interior corners of the hollow space between the walls. Odam, in U.S. Pat. No. 2,029,082 discloses a concrete wall which is formed from inner and outer slabs which are arranged in horizontal rows. The concrete is not poured between two forming walls. Boeshart in U.S. Pat. Nos. 4,916,879; 5,658,483 and 5,782,050 discloses corner ties for walls made with foampanels and concrete. The corner ties are marketed as FOLD FORM® and are sold by Fold Form, Inc., Sioux City, Iowa. The product is a molded plastic web with limited support external of the panels. The product is restricted to the dimensions provided and has no versatility to be adapted to various angles for the corner or varying spacing between the panel walls if the concrete portion of the wall is to have a greater or lesser thickness than preset in the product. A separate form is required if the corner angle or thickness of the concrete is varied. The product is disposed between two vertically abutting panels and the edges of the panels each must be provided with specially cut slots to receive straps in the product. In U.S. Pat. No. 5,564,235, Butler discloses a customized computer aided system which permits the floating of a foundation supporting wall and floor joists on adjustable supports. Fink in U.S. Pat. No. 5,820,477 discloses a connecting system used with boxes with connectors to form a corner.
There is a need for a versatile corner support which is usable for varying angles of corners and varying thicknesses of concrete wall. The corner support must be capable of being used with no, or only minimal, adaptation of ht panels. The corner support must provide sufficient support as to avoid the necessity for exterior bracing and to prevent sag, separation or blowout of the corner when concrete is introduced.
BRIEF SUMMARY OF THE INVENTION
It is an object of the present invention to provide a corner system which is versatile and can be used with varying corner angles and varying thicknesses of concrete.
It is another object of the present invention to provide a corner system which fully supports the form panels without further aids and avoids sag, deformation, separation and blowout of the corners.
In accordance with the teachings of the present invention, there is disclosed a form assembly used for concrete construction, wherein the concrete is poured between spaced-apart plastic form panels. The form panels are retained during the pouring of the concrete. The improvement is a metal corner assembly having two bent sheet metal members, an inner member and an outer member spaced apart a preselected distance. Each bent metal sheet metal member has at least one horizontal slot formed therein. The plastic form panels are received within the respective first and second metal members and retained thereby during the pouring of the concrete into the space between the respective plastic form panels. At least one receiver plate has a length, a wider end and an opposite narrower end, the narrower end having an opening therethrough. The narrower end of the at least one receiver plate is received in the at least one horizontal slot on the sheet metal member such that the opening in the narrower end extends through the plastic panel within the sheet metal member such that the at least one receiver plate is approximately perpendicular to the bent sheet metal member. The at least one receiver plate has a stop means on the wider end. At least one bridge member has a length, a bent first end and a bent opposite second end. The bent first end of the at least one bridge is received in the opening in the at least one receiver plate in the outer bent sheet metal and the second bent end of the at least one bridge member is received in the opening in the at least one receiver plate in the inner bent sheet metal member. The inner and outer sheet metal members are secured and spaced apart by the preselected distance.
In further accordance with the teachings of the present invention, there is disclosed a form assembly used for concrete construction, wherein the concrete is poured between spaced-apart plastic form panels. The form panels are retained during the pouring of the concrete. The improvement is a metal corner assembly having two bent sheet metal members, an inner member and an outer member spaced apart a preselected distance. Each bent metal sheet metal member has a plurality of spaced-apart horizontal slots formed therein. The plastic form panels are received within the respective first and second sheet metal members and retained thereby during the pouring of the concrete into the space between the respective plastic form panels. A plurality of right angle receivers are provided, each right angle receiver being a plate having a tapered end and an opposite end. The plate has a right angle bend between the ends. A through hole is formed in the tapered end. The tapered end is received in a respective selected horizontal slot in the sheet metal member such that the opening in the narrower end extends through the plastic panel within the sheet metal member. A bridge member has a length, a bent first end and an opposite bent second end. The bent first end of the bridge is received in the opening in the right angle receiver in the outer sheet metal member and the bent second end of the bridge is received in the opening in the right angle receiver in the inner sheet metal member such that the inner and outer sheet metal members are secured and spaced apart by the preselected distance.
In still further accordance with the teachings of the present invention, there is disclosed a corner assembly for concrete form panels. A rigid member has an inner face and a bend therein forming a selected dihedral angle having a first side and a second side. At least one horizontal slot is formed in the first side and at least one horizontal slot is formed in the second side. A pair of plastic panels are disposed in juxtaposition to one another within the first side and the second side of the rigid member. At least one first receiver plate passes through the at least one horizontal slot in the first side and a portion thereof projects beyond the plastic panel within the first side. At least one second receiver plate passes through the at least one horizontal
Yost Louis L.
Yost William R.
Friedman Carl D.
Katcheves Basil
LandOfFree
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