Static structures (e.g. – buildings) – With piercing or expanding earth anchor – Pivot means connecting separate fluke or hook
Patent
1996-08-06
1998-07-07
Wood, Wynn E.
Static structures (e.g., buildings)
With piercing or expanding earth anchor
Pivot means connecting separate fluke or hook
52155, 52166, 256DIG5, 4052591, E02D 580
Patent
active
057750378
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to ground anchors of the type which are attached to cables and rods and driven into the ground and tilted transversely by tensioning the cable.
A variety of ground anchors already exist including tubular anchors, such as those described in GB-A-1555580 and EP-A-0208153. These anchors are driven into the ground and then rotated to a horizontal locked position. As the surface area of these anchors is not particularly large, they are not appropriate for some uses where a particular degree of strength and resistance to removal from the ground is required.
Improvements have been made to such anchors which resulted in the addition of wings to provide a greater planar or surface area to resist the anchors from being pulled from the ground once in their tilted locked position. Examples of such wing anchors are known from EP-A-0313936, U.S. Pat. No. 4,574,539 and U.S. Pat. No. 3,282,002. Each of these anchors has different specific features which enable the anchors either to be easily driven into the ground, to prevent its withdrawal therefrom or to ease the ability of rotate the anchor once embedded in the ground.
However, in hard ground conditions wing-type anchors are not generally suitable because of the increase in the quantity of ground media to be moved. For such conditions high capacity small profile anchors, such as the original tubular anchors, are most suitable.
It is therefore an object of the present invention to further improve anchors of the small profile type in these respects.
SUMMARY OF THE INVENTION
According to the invention there is provided a ground anchor comprising a body portion having a generally triangular cross-section extending substantially along its length having generally concave sides and a continuous convex lower surface from one edge of the body portion where the sides and lower surface meet to an opposite edge.
Preferably the edges of said body portion curve or angle upwardly where the sides and lower surface meet. Edges of said body portion where the sides and lower surface meet are preferably rounded.
In a preferred embodiment of the invention the anchor comprises a driving edge formed at one end of said body portion.
Preferably the body portion extends upwardly to form a keel in which is formed an anchor eye. Alternatively a keel portion is formed on the body portion in which is formed a socket.
The keel member is preferably convergent in a horizontal and/or vertical plane from the eye portion or socket to the driving edge.
A preferred embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a plan view of an anchor according to the invention;
FIG. 2 is a side elevation of the anchor of FIG. 1;
FIG. 3 is a front elevation of the anchor of FIG. 1;
FIG. 4 is a rear elevation of the anchor of FIG. 1;
FIG. 5 is a schematic view of the anchor of FIG. 1 with the eye replaced with a swaged fitting;
FIG. 6 is a partial schematic view of the swaged fitting of FIG. 5 with parts omitted for clarity; and
FIGS. 7a-7c are schematic views of the installion steps applied to a prior art anchor.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
As shown in FIGS. 1-4 the anchor 10 comprises a generally triangular or bell-shaped body 11 having an axially extending blind bore 12 for receiving a driving tool. When viewed from one end, the anchor 10 is seen to have a triangular bell-shaped profile for a substantial length along its working surface. The sides of the anchor body 11 are, in profile, continuously concave from an upper edge of the working surface to edges 16 where the sides and lower surface meet. The lower surface of the body 11 is continuously convex from edge to edge. The edges 16, may curve or angle slightly upwardly from the horizontal. These edges 16 may be rounded or edge beads provided. It is to be noted that the use of the terms "concave" or "convex" are intended to include not only inwardly or outwardly rounded su
REFERENCES:
patent: 610184 (1898-09-01), Hill
patent: 736995 (1903-08-01), Miller
patent: 994356 (1911-06-01), Wood
patent: 1991488 (1935-02-01), Blackburn
patent: 3139163 (1964-06-01), Haller
patent: 3969854 (1976-07-01), Deike
patent: 4574539 (1986-03-01), Deike
patent: 5457925 (1995-10-01), Koedyker
Platipus Anchors Limited
Wilkens Kevin D.
Wood Wynn E.
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