Form tie
US4391429A · kind A · utility
Inventor
Key dates
| Filing date | Sep 4, 1981 |
| Grant date | Jul 5, 1983 |
| Priority date | — |
| Expiry date | Sep 4, 2001 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04G17/0721
- WIPO fieldCivil engineering
- WIPO sectorOther fields
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.