Fences – Miscellaneous
Patent
1996-10-18
1999-01-19
Kim, Harry C.
Fences
Miscellaneous
256 48, 256DIG5, E04H 1700
Patent
active
058606360
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
THIS INVENTION relates to fence posts and the like, and while the invention will be found extremely applicable to fence posts, it will become apparent from the disclosures herein that a wide variety of applications therefor can be found including structural beam usages by way of example.
BACKGROUND ART
Fence posts in the form of heavy solid lengths of metal such as black iron are being used increasingly wherever they can be applied, but they suffer from obvious disadvantages in the three areas of being undesirably heavy, involving resultantly high cost, and being very subject to rusting. The latter problem can be reduced by hot dip galvanising before user but the benefit is reduced by the added expense. It has been considered undesirable to reduce the metal content or material volume in order to reduce the cost since this results in a weaker article.
Our present invention has been devised with a view to overcoming the aforementioned problems associated with fence posts as currently used, and it has for its principal object the provision of a novel form of post which will achieve all current requirements yet can be made more cheaply and with less weight for a given length, and which will not be subject to rust problems. More particularly, the invention aims to achieve these benefits by producing a novel elongated member by roll forming galvanised sheet steel to cross-sections not previously attained. Other objects and advantages of the invention will be more fully appreciated from the subsequent descriptions herein.
DISCLOSURE OF THE INVENTION
With the foregoing and other objects in view, our invention resides broadly in an elongate member usable inter alia as a fence post, formed to constant cross-section by a suitable sheet metal roll forming process, said member when viewed in cross-section having three arm sections each of double sheet thickness radiating from a junction, two of said arm sections at their outer edges remote from the junction having their two sheet sections joined through an integral arcuate or other box-section formation, while the third said arm section has a like formation in which the free terminal edge of one sheet section is contained within a terminal roll of the other sheet section.
In accordance with one preferred practical embodiment of the invention, the elongate member has three arm sections at about equal angles to one another and each terminating in a near-circular box-section formation at the outer edges; and in its obvious application as a fence post, apertures to receive wire are provided at intervals along one of the arm sections, while the end which is lowermost in use is shaped to a point for driving into the ground. However, the box-section formations at the outer edges of the three arm sections could be of other shapes such as triangular. In addition, the angles between the arm sections can be unequal to desired degree, while in one embodiment it is preferred that two of the arm sections be substantially co-planar and at right angles to the third section which would most suitably have therein the free edge extremities of the initial metal sheet from which the member is roll formed. Such a T-section elongate member would when desired provide a web of maximum width to accommodate, for example, a strip of reflective tape when used for road markings.
The use of galvanised steel sheet will facilitate suitability as non-rusting fence posts or pickets, the thickness of the steel sheet being selected according to the intended application. While the roll formed member may be provided easily with apertures for wires, suitable wire-securing clips could be used instead of apertures. Elongate members according to the invention are also very usable in fabricated beams or joists as inclined strengthening struts therein which will be light and relatively cheap and yet of considerable strength for the desired purposes. Other features of the invention will be hereinafter apparent.
BRIEF DESCRIPTION OF THE DRAWINGS
In order that the invention
REFERENCES:
patent: 359178 (1887-03-01), Randall
patent: 851445 (1907-04-01), Seymour
patent: 910192 (1909-01-01), Grouvelle et al.
patent: 1183047 (1916-05-01), Suhren
patent: 3332189 (1967-07-01), Blatnik
Boissevain Daniel John
Duncan Ernest John
Kim Harry C.
Tristar Fencing Australia Pty Limited
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