Static structures (e.g. – buildings) – Openwork; e.g. – truss – trellis – grille – screen – frame – or... – Spacer-positioner; e.g. – rebar chair
Patent
1998-05-01
2000-05-16
Friedman, Carl D.
Static structures (e.g., buildings)
Openwork; e.g., truss, trellis, grille, screen, frame, or...
Spacer-positioner; e.g., rebar chair
52699, 52298, 521695, 522208, 2851501, 285221, 285219, 248523, E04C 516
Patent
active
060619902
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a conduit positioning or locating devices which are particularly designed for use in positioning conduits for passage through concrete slabs, for example concrete slab walls or floors.
BACKGROUND ART
There is currently known a conduit positioning device which is arranged to position conduits carrying electrical cables for passage through concrete slabs. Such a device comprises a member which has a generally frustoconical side wall an annular flange about the larger diameter end of the device and an end wall opposite the annular flange which includes a socket for receipt of the conduit. In use, the device is secured to formwork by means of clouts which are passed through the annular flange which for that purpose is provided with a series of spaced apart apertures. The conduit is then inserted into the socket and when the concrete is poured, it encapsulates the device and conduit. After the concrete has cured and the formwork is removed, the device is pulled away from the cured slab, either with the formwork or separately leaving a void in which the end of the conduit terminates. The end of the conduit may then be connected to a further conduit or conduit fitting in the void.
The main disadvantage of his form of device is that because of its configuration, being circular in cross-section, a series of devices cannot be located any closer than a position where flanges of adjacent devices abut each other. This therefore means that the area required for the passage of conduits through the slab is substantial, particularly where a large number of conduits are required to be passed through a slab. In addition, some difficulty is often encountered in removing the device from the slab.
The present invention aims to overcome or alleviate one or more of the above disadvantages by providing an improved conduit positioning or locating device which permits conduits which are required to be passed through a slab to be located relatively closely to each other and therefore reduce the area of the slab required for passage of conduits.
The present invention firer aims to provide a device in modular form which may be associated with one or more other such positioning devices to locate a plurality of conduits. Other objects and advantages of the invention will become apparent from the following description
DISCLOSURE OF THE INVENTION
The present invention thus provides in one aspect, a conduit positioning or locating device adapted to be secured to formwork defining one side of a slab of concrete or other settable material for positioning a conduit for passage through said slab, said device including a body, having a socket or opening on its top side for receipt of a conduit, said body having means on at least one side adapted for co-operative engagement with a further said device whereby to enable a pair of said devices to be located in a complementary mating configuration
In one form, the body includes on opposites sides complementary coupling means adapted for engagement with corresponding complementary coupling means of an adjacent device whereby a series of devices may be interconnected. The complementary coupling means may in one form comprise a spigot and socket. In one particularly preferred form, each side of the body may be provided with a spigot and socket which oppose each other on opposite sides of the device. The opposite sides of the body may be substantially planar such that when the devices are in their complementary mating configuration, the planar sides thereof are juxtaposed.
The body may also include flange means which enable the body to be secured to formwork. The flange means may comprise flanges on opposite ends of the device. The flanges may be apertured to receive fasteners therethrough, such as clouts whereby the devices may be releasably secured to formwork.
The sockets in respective bodies may be of different sizes for receipt of conduit of different diameter. In addition, in one form the body may include a plurality of sockets to enable a plurality
REFERENCES:
patent: 1811735 (1931-06-01), Van Bezel
patent: 3267627 (1966-08-01), Hammitt
patent: 3292335 (1966-12-01), Stober
patent: 4593940 (1986-06-01), Wilder
patent: 4623170 (1986-11-01), Cornwall
patent: 4669759 (1987-06-01), Harbeke
patent: 5309688 (1994-05-01), Robertson
patent: 5560163 (1996-10-01), Carlton
patent: 5595039 (1997-01-01), Lowery
patent: 5794395 (1998-08-01), Reed
patent: 5836130 (1998-11-01), Unruh et al.
International Search Report, International Application No. PCT/AU96/00694, International Filing Date Nov. 1, 1996.
Friedman Carl D.
Thissell Jennifer I.
Zardoz Pty Ltd.
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