Static structures (e.g. – buildings) – With lifting or handling means for primary component or... – Construction or component having means to engage hand or...
Reexamination Certificate
1999-09-16
2001-08-28
Friedman, Carl D. (Department: 3635)
Static structures (e.g., buildings)
With lifting or handling means for primary component or...
Construction or component having means to engage hand or...
C052S125400, C052S125600, C052S677000, C052S688000, C052S689000
Reexamination Certificate
active
06279274
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to fittings adapted to be incorporated into concrete components during casting thereof.
2. Description of the Prior Art
In the fabrication of certain reinforced concrete components for use in building construction it may sometimes be necessary to incorporate within the structure of the concrete component during casting, a fitting such as an internally-threaded ferrule for forming a subsequent fixing point within the component or a lifting anchor which forms a lifting point for attachment of components of a lifting system used in the erection of the component. In one form, the ferrule or anchor is carried by a support chair which rests on the base of formwork for the concrete component, with the ferrule or anchor extending upwardly from the chair. The assembly consisting of the support chair with the ferrule or anchor is tied into the reinforcement using short lengths of reinforcing bar. When the concrete is subsequently poured into the formwork the assembly of the support chair and ferrule or anchor is incorporated within the structure of the concrete component and is firmly retained due to the tie bars which link the assembly to the main reinforcement of the component. The applicants have now determined that a difficulty can arise in that interaction between the tie bars and the shank of the ferrule or anchor sometimes can cause the tie bars to lift the assembly off from the base of the formwork if, as not infrequently happens, an operator happens to step on the reinforcement prior to casting. This in turn may mean that the head of the ferrule or anchor is no longer at the correct distance from the face of the component formed by the base of the formwork and also the assembly consisting of the support chair and ferrule or anchor may tilt relative to the lower face of the formwork.
SUMMARY OF THE INVENTION
According to the present invention, there is provided a shoe for use with a fitting such as a lifting anchor or ferrule adapted to be cast into a reinforced concrete component, said shoe serving, in use, to locate tie-in bars relative to the fitting and comprising a body portion adapted to be slidably received on a shank of the fitting, and means for engaging tie-in bars extending at opposite sides of the shank.
In a preferred embodiment of the invention the engaging means comprises one or more clips for engagement with the tie-in bars.
Advantageously, the clips are arranged to couple with the tie bars with a snap-in engagement.
The present invention also provides an assembly consisting of a support for resting on the base of formwork for said component, a said fitting carried by the support so as to be upstanding therefrom, and a said shoe slidably mounted on the shank of the said fitting for engagement with tie-in bars of the reinforcement.
Advantageously, the fitting carries at its lower end a transverse shear pin and the shoe is mounted on the shank above the shear pin.
When the said fitting is a lifting anchor, the assembly preferably also consists of a void former mounted on the head of the anchor, with the shoe being movable along the shank of the anchor between the void former and support.
The invention also provides a said shoe for retro-fitting onto a lifting anchor assembly comprising the support, the anchor, and a void former attached to the head of the anchor, said shoe being in the form of two or more parts which can be assembled around the shank of the anchor or said shoe being of one-piece split construction which enables the shoe to be fitted onto the shank by opening the shoe to permit passage over the shank.
REFERENCES:
patent: 2772560 (1956-12-01), Neptune
patent: 2930220 (1960-03-01), Hamilton et al.
patent: 3195278 (1965-07-01), Ballou
patent: 3199259 (1965-08-01), Long
patent: 3350820 (1967-11-01), Stonely
patent: 3420014 (1969-01-01), Courtois et al.
patent: 3431012 (1969-03-01), Courtois et al.
patent: 3705469 (1972-12-01), Eriksson
patent: 4179151 (1979-12-01), Tye
patent: 4437642 (1984-03-01), Holt
patent: 4580378 (1986-04-01), Kelly et al.
patent: 4947613 (1990-08-01), Fricker
patent: 5014473 (1991-05-01), Kelly et al.
patent: 5242249 (1993-09-01), Grayson
patent: 5588263 (1996-12-01), Kelly et al.
patent: 953942 (1974-09-01), None
Product Bulletin: “Concrete Lifting Systems” 125mm Face Lift Anchor—FL50125; Ramset Fastening Systems.
Amiet Shoal David
Ferrier Ian Ross
A Phi Dieu Tran
Friedman Carl D.
Harness Dickey & Pierce
Ramset Fasteners (Aust.) Pty. Ltd.
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