US 4,391,429 AGranted

Form tie

OwnerJohn M. Powellinventor

Life of this patent

Estimating the term…

Loading patent…

Abstract

A form tie is disclosed for interconnecting a pair of spaced panels providing the sides of a form and for locating and supporting at least one reinforcing rod at a preselected location intermediate the panels. The form tie includes a unitary elongated member of generally Z-shaped configuration having generally parallel elongate members joined by an intermediate diagonal member and rectilinear braces and tabs for supporting the panels of the form. One embodiment of the present invention includes a second elongate member formed integrally with the generally Z-shaped member for locating and supporting a reinforcing rod at a preselected location intermediate the panels. Alternate embodiments of the form tie of the present invention include means for locating and supporting a second reinforcing rod at a preselected location intermediate the panels. The specific structural features of the form tie also provide improved resistance to vertical and horizontal shear forces acting on the form sides in addition to resisting transverse forces which tend to move the form sides toward or away from each other.

Claims3

Dependent claims

A form tie for use in fixing a pair of form sides in a preselected spaced position with respect to each other at a given location against shear and transverse forces acting on said form sides at said given location and for locating, supporting and maintaining at least one reinforcing rod at a preselected location intermediate said form sides, said form tie comprising:

a unitary elongate member of a generally Z-shaped configuration including a pair of generally parallel elongate members having first and second end portions, the first end portion of each parallel, elongate member being positioned in an opposed, spaced apart relationship with respect to the second end portion of the other parallel elongate member and having a bight formed therein terminating in a rectilinear brace extending substantially normal to said parallel, elongate members, and
means for locating, supporting and maintaining at least one reinforcing rod at said preselected location intermediate said form sides comprising a second unitary elongate member formed integrally with said rectilinear tab of said bight of one of said second end portions and lying substantially in the plane of said generally planar structure, said second unitary elongate member having a first portion extending obliquely from said rectilinear tab to said preselected location and terminating in an L-shaped member adapted to receive said at least one reinforcing rod and maintain said rod at said preselected location.

Dependencies are inferred from the claim text.