Static structures (e.g. – buildings) – Shaft with embedding wing-type brace – Wings in different planes
Patent
1993-06-14
1995-03-14
Driedman, Carl D.
Static structures (e.g., buildings)
Shaft with embedding wing-type brace
Wings in different planes
52155, 52160, 52165, 248530, 248545, 135118, E02D 580, E04H 1222, A45F 344
Patent
active
053967437
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an anchorage device for use in sand or sandy soils.
A requirement exists for an anchorage device which can be set into sand or sandy soil to provide a secure anchorage therein. Anchorage devices for beach umbrellas and the like have been prepared in the form of a coarse screw thread at the end of the shaft of the umbrella. The device screws into the sand and provides a degree of anchorage, but not a firm anchorage and can easily be displaced.
According to the present invention, there is provided an anchorage device for use in sand or sandy soils, said device. comprising a shank portion and a spike portion at a lower end of the shank portion, said spike portion comprising a first pair of downwardly convergent plates, said device further comprising a second pair of downwardly convergent plates extending from a position above the upper ends of the first plates to a position beneath the upper ends of the first plates to funnel sand into the zone between the interior surfaces of the first plates.
In a preferred embodiment, the first and second pairs of plates are mounted on a substantially planar web, with the plates extending perpendicularly to the web and on opposite sides of the web.
Advantageously the upper ends of the second plates are outwardly flared.
Embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings, in which:
FIG. 1 is a side view of an anchorage device in accordance with the invention;
FIG. 2 is an end view of the device;
FIG. 3 is a perspective view of the device; and
FIGS. 4 to 6 show, schematically, modified forms of the device.
The anchorage device shown in the drawings comprises a tubular shank 2 leading to a spike portion 4 which can be set firmly into sand to provide a secure anchorage within the ground. The shank 2 is open at its upper end to receive the shaft of, for example, a beach umbrella. The invention is not limited to an anchorage device for umbrellas. Anchorage devices in accordance with the invention can be used for anchoring other articles or structures such as tents or fence posts. Several such anchorage devices linked by adjustable chains and incorporating ground plates within the ground in front of the shanks could be used as a ground anchorage for use in winching out a vehicle bogged within the ground.
The spike portion 4 comprises two lower substantially rectangular and planar plates 6 which converge towards a tip 8. The plates 6 are mounted at opposite edges of a planar V-shaped web 10, with the plane of each plate 6 extending perpendicularly to the plane of the web 10 and with each plate extending to both sides of the web 10. The V-shaped web 10 merges with the tubular shank via a transition section 12 comprising a series of angularly-spaced chamfers 14 inclined inwardly from the shank 2 to the web 10 whereby adjacent chamfers 14 are separated by a downwardly-directed and inwardly-inclined rib 16.
A further pair of downwardly and inwardly inclined or convergent rectangular and planar plates 18 is mounted on the web 10 above the lower plates 6. These further plates 18 have a width equivalent to that of the lower plates 6 and extend on opposite sides of the web 10, the upper ends of the plates 18 lying adjacent the upper end of the transition section 12 and the lower ends of the plates 18 being spaced and lying between the upper ends of the lower plates 6 so that the two sets of plates 6 and 18 overlap. With this configuration, channels 20 are defined at each side of the web 10 between the lower ends of the upper plates 18 and the upper ends of the lower plates 6 to feed sand from around the top of the spike portion 4 into the spike portion 4 to be contained between the inner surfaces of the lower plates 6. The upper plates 18 also act to funnel sand into the spike portion 4.
Typically the device will be used either in a beach situation where the sand is powder dry on top and wet or damp below, or in a desert or other land situation where the sand is powder dry on top and firm
REFERENCES:
patent: 1153450 (1915-09-01), Schaff
patent: 1879414 (1932-09-01), Munoz
patent: 3887154 (1975-06-01), Cornett
patent: 4649678 (1987-03-01), Lamson
patent: 4832304 (1989-05-01), Morgulis
Canfield Robert
Driedman Carl D.
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