Formwork tie & apparatus for retaining tie

a technology of forming panels and ties, which is applied in the direction of forms/shuttering/falseworks, shaping building parts, constructions, etc., can solve the problems of increasing labor costs associated with engaging and disengaging the mechanisms, affecting the general operation of the mechanism, and affecting the quality of the work. , to achieve the effect of facilitating disconnection and providing friction resistan

Inactive Publication Date: 2009-10-01
WARD PHILIP T
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]In various implementations, the supplemental pin apparatus may include any one or more of the following additional features. The head end of the engagement pin may be tapered to facilitate disconnecting the adjacent panels. The head end may be approximately between less than 1.625 inches and 0.5 inches long. The apparatus may further include a flange located on a rear portion of the engagement pin, wherein, when the apparatus is connecting the adjacent panels, the adjacent panels are located between the flange and the locking fingers. The apparatus may further include one or more O-rings located at least partially around the engagement pin to provide friction resistance for maintaining the apparatus fully within a receiving hole of at least one of the panels.

Problems solved by technology

Unfortunately, these mechanisms generally suffer from a number of problems and disadvantages, including frequent loss of loose pieces and longer time and increased labor costs associated with engaging and disengaging the mechanisms in order to erect and strip the framework.
It will be appreciated that this process requires several steps, and, furthermore, that accomplishment of one or more of these steps may be hindered by the aforementioned transverse stress caused by the weight of the poured material pressing upon the panels.
This hole in the material of the tie creates weak points of relatively thin material above and below the hole, i.e., between the edge of the hole and the edge of the tie, at which the tie is more susceptible to failure.

Method used

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  • Formwork tie & apparatus for retaining tie
  • Formwork tie & apparatus for retaining tie
  • Formwork tie & apparatus for retaining tie

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Embodiment Construction

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BRIEF DESCRIPTION OF THE DRAWING FIGURES

[0014]The present invention is described herein with reference to the following drawing figures, with greater emphasis being placed on clarity rather than scale:

[0015]FIG. 1 is a side elevation view of an embodiment of a primary pin apparatus of the present invention;

[0016]FIG. 2 is an exploded first side elevation view of the apparatus of FIG. 1;

[0017]FIG. 3 is an exploded second side elevation view of the apparatus of FIG. 1;

[0018]FIG. 4 is an exploded third side elevation view of the apparatus of FIG. 1;

[0019]FIG. 5 is an exploded side elevation view a pin assembly component of the system of FIG. 1;

[0020]FIGS. 6-9 are fragmentary, cross-sectional plan views showing operation and use of the apparatus of the present invention;

[0021]FIG. 10 is a fragmentary, cross-sectional elevation view of an embodiment of a supplementary pin apparatus of the present invention which may be used with the apparatus of FIG. 1;

[0022]FIG. 11 is a fragmentary, el...

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Abstract

A primary pin apparatus having an adjustable one-step connection and disconnection mechanism, a supplemental pin apparatus for supplementing the primary pin apparatus and engaging ties, and an improved tie having a non-circular engagement hole. The primary and supplemental pin apparatuses each include an engagement pin including one or more locking fingers which selectively protrude angularly outward from a longitudinal axis of the engagement pin, wherein the locking fingers are selectively extendable and retractable in order to, respectively, connect and disconnect adjacent forming panels of a formwork. The tie includes a body which is elongated along a longitudinal axis and has an end presenting an engagement hole for receiving a pin, wherein the engagement hole having a greater dimension along the longitudinal axis and a lesser dimension along an axis which is perpendicular to the longitudinal axis.

Description

FIELD OF THE INVENTION[0001]The present invention relates to apparatuses and ties for connecting forming panels used in casting cementitious or other material, such as concrete. More particularly, the present invention concerns a primary pin apparatus having an adjustable one-step connection and disconnection mechanism, a supplemental pin apparatus for supplementing the primary pin apparatus and engaging ties, and an improved tie having a non-circular engagement hole.BACKGROUND OF THE INVENTION[0002]Formwork is used to contain and shape cementitious or other flowable material, such as concrete, during the pouring and setting, or curing, processes. One common use of formwork is in the casting of walls. Once the material has sufficiently set, the formwork is stripped, or struck, therefrom to be reused elsewhere.[0003]Generally, formwork comprises parallel, spaced apart rows of forming panels, with each panel of a row being temporarily connected to an adjacent panel to define a side of...

Claims

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Application Information

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IPC IPC(8): E04G17/075E04G11/06
CPCE04G17/047E04G17/04E04G2017/0646
InventorWARD, PHILIP T.
OwnerWARD PHILIP T