Form panel clamp

Details Form panel clamp Form panel clamp

1999-02-16

2001-11-27

Friedman, Carl D. (Department: 3635)

Static molds

Miscellaneous mold adjuncts

In situ construction engineering or building type

C249S047000, C249S025000, C249S033000, C248S226110, C248S228500

Reexamination Certificate

active

06322046

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates generally to concrete form panels for pouring walls, such as basement walls, and more particularly to a clamping system for such forms.
For pouring concrete walls, such as basement walls, a plurality of inner and outer concrete form panels are mounted around the inner and outer perimeter of the planned wall. Each of the form panels includes a flange extending away from the wall. Each of the flanges include a number of vertically spaced apertures which align with apertures in the flange of the adjacent form panel. Adjacent form panels are secured to each other via pins which are inserted through adjacent pairs of apertures. Each pin includes an elongated slot into which is inserted a wedge.
Usually, flanges on the inner form panels align with flanges on the outer form panels. Wire ties are secured between the flanges of the adjacent inner panels and drawn to the opposite pair of flanges on the outer panels to counteract the weight of the poured concrete and to prevent the inner or outer form panels from bowing out away from the wall. This technique works well for simply shaped basement walls; however, offsets or juts pose a particular problem. Many basement walls for current homes include short offsets in which a section of the wall is offset 8-14 inches. In this case, some of the short form panels utilized in forming the corners and short perpendicular section of the wall cannot be secured with the wire ties, because there is no directly opposite pair of flanges. As a result, large wooden braces are typically constructed to brace both the outer and inner form panels for example, from an eight foot high form panel. The construction of these extra braces is time consuming, and thus expensive.
After the inner and outer form panels are assembled, concrete is poured in between the inner and outer form panels. After the concrete cures, the form panels are disassembled and later reused.
SUMMARY OF THE INVENTION
The present invention provides a concrete form panel clamp which replaces the need for extra braces for offsets in concrete form panels.
Generally, the preferred clamp comprises a first pin mounted perpendicularly to a threaded rod at a first end of the rod. A second pin generally parallel to and spaced away from the rod is mounted to a tube slidably mounted on the rod. The tube is positioned between the first end and a nut threaded onto the rod. A handle extends radially from the nut.
In practice, for both the inner and outer form panels, there is a first form panel which is generally parallel to and laterally offset from a second form panel. A third form panel extends generally perpendicularly to the first and second form panels, joined by an inner corner and outer form panels to the first and second form panels, respectively. Each of the form panels includes a pair of perpendicularly extending flanges. The first pin of the clamp is inserted through adjacent apertures in the first form panel and inner corner form panel. The second pin is inserted through adjacent apertures in the flanges of the third form panel and outer corner form panel. The nut is then tightened to impart force on the tube and second pin toward the first end, thereby clamping the third form panel between the outer and inner corner form panels. The force on the first pin at the flanges of the first form panel and inner corner form panel is transferred via wire ties between the inner and outer form panels. Preferably, a plurality (three or four) clamps are utilized on each of the inner and outer form panels at each offset.


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