US2029740A - Earth anchor - Google Patents

Description

Feb. 4, 19350 M. RosNER 2,0293% EARTH ANCHOR Filed Jan. 4, 1935 Patented Feb. 4, 1936 TED STATES oFFIcEL EARTH ANCHOR Max Rosner, Chicago, Ill., assignor to General Outdoor Advertising 00., Inc., Chicago, 111., a

corporation of New Jersey Application January 4, 1935, Serial No. 420

3 Claims.

strength of the installation with less labor and expense. r

Another object of my invention is to provide an anchor that cannot be withdrawn without ofiering resistance equivalent to the pull for which it was designed.

Another object of my invention is the easy manner in which the pipe or guy rod can be salvaged by unscrewing said pipe or rod from the anchor.

Another object of my invention is the multiplicity of resisting leaves can be varied in shape or number in accordance with the nature and resistance of ground.

Another object of my invention is its rigidity before being formulated in the hole and the simplicity with which it permanently assumes its final shape.

Other objects and advantages will be apparent from the following description and the accompanying drawing, in which similar characters of reference indicate similar parts throughout the several views.

Referring to the single sheet of drawings accompanying this description:

Fig. l is a vertical sectional view taken through the earth at a plane determined by the guide and driving pipes and the hole which was dug for the anchor, showing the improved modejof installation;

Fig. 2 is a sectional view similar to Fig. 1, showing the anchor driven down by the driving pipe;

Fig. 3 is a sectional view similar to Figs. 1 and 2, with the anchor in final position, the driving pipe withdrawn and the earth in place;

Fig. 4 is a plan View of the anchor in its spread position;

Fig. 5 is a sectional view taken on the line 5--5 of Fig. 4;

Fig. 6 is a detail view of one of the anchoring leaves, and

Fig. '7 is a detail view of a modified form of an anchor leaf. I

Referring to Figs. 1 to 3 indicates in its entirety a leaf expanding anchor ll], consisting of upper and lower mounting plates 12 and I4. Interposed between the mounting plates l2 and M are four expanding leaves 16 which are bent at their midsections. Threadedly attached at l8 to the lower mounting plate id is a guy pipe or rod 20, the upper plate l2 has a drilled guide hole 22 of a larger annular diameter than the guy pipe 20,

v to permit free movement of the plate l2 downwardly when the anchor is being driven by a driving pipe 24.

The guy pipe 20 must be of a desirable length and without any projections in order to permit thewdriving pipe 24 to either slidablyorlooselyfit over said guy pipe and extending afoot or more driving tool spreading the anchor lfl into its proper expansible position. 7

The anchor i0 is adapted to fit easily into the drilled hole 26 of Fig. l, the earth in the Walls being relatively compact allowing the anchor to drop or slide to the required depth, depending solely whether the hole is a vertical one or one drilled at an angle. The expanding anchor I E] is preferably attached to the guy pipe 29 before entering the drilled hole and then is lowered to the bottom 28 of the drilled anchor hole. The anchor is now in the proper position to be expanded, which necessitates the use of the driving pipe 24. Fig. 2 illustrates the expanded formation of the anchor after the driving pipe 24 has been struck by an appropriate driving tool and the manner in which the anchoring leaves l6 have entered into the undisturbed firm earth. By rotating the guy pipe 20 in aclockwise direction after the driving pipe 24 has been removed the anchoring leaves I6 bite into more substantially undisturbed ground, thus firmly anchoring the same.

The anchoring leaf N5, of which Fig. 6 is a detail, has at both of its extremities two retaining lugs 33 which in turn fit into corresponding rectangular slots 32 formed in plates l2 and M. In the center of the leaves i (S are cut out relief slots 34 which naturally, when slightly bent as indicated at 36 of Fig. 1, will be the first and only place the leaf will bend because of the cut out relief 34, and the beforementioned break 36. In the assembly of the leaves to the top and bottom plates l2 and 14 when the anchoring leaves are and lower plates l2 and I4 and make the anchor ill a complete unitary device without any other forming operations.

The condition of the earth will govern the size, shape and number of leaves. There may be from two leaves to eight, or even more, and the leaves may also be of a tapered shape as shown in Fig. 7, which will give the anchor I!) a greater resistible area, but conditions such as these will occur only when the earth is of a very soft nature.

. Whenever the necessity arrives for the tearing down of the job for which the anchor I is used, the salvaging of the guy pipe 26 will be a very simple matter and will not require any cutting or digging to loosen it from the anchor It. By merely turning the guy pipe 20 in a counter-clockwise direction, it will be unscrewed from the plate M then pulled through the upper plate I2, and then finally withdrawn from the hole.

It will thus be observed that I have invented an earth anchor having means for securely positioning the anchor on a guy pipe during the installation of the anchor, the formation of the anchor by a driving pipe, and my invention also permits ,the release of the guy pipe when it is desired to abandon the anchor.

While I have illustrated a preferred embodiment of my invention, many modifications may be made without departing from the spirit of. the

invention, and I do not wish to be limited to the precise details of the construction set forth, but desire to avail myself of all changes within the scope of the appended claims,

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. An earth anchor for a guy member comprising an upper plate and a lower plate mounted on said guy member, each having a peripheral series of openings, a series of leaves each having a reduced lug at each end, and each lug entering an opening in one of said plates, said leaves being initially bent at its midpoint so as to bow outwardly and being weakened at said point so that said leaves collapse outwardly when the plates are caused to approach.

2. In combination, a guy member, an earth anchor mounted thereon comprising a lower plate immovably mounted on the guy member, an upper plate mounted for free sliding movement on the guy member, said plates have corresponding peripheral openings, and leaves having reduced lugs at opposite ends entered into corresponding openings in said plates, said leaves being initially bent at their mid-point so as to project outwardly.

3. In combination, a guy member, on earth anchor mounted thereon comprising a lower plate immovably mounted on the guy member, an upper plate mounted for free sliding movement on the guy member, said plates having corresponding peripheral openings, and leaves having reduced lugs at opposite ends entered into corresponding openings in said plates, said leaves being weakened at said mid-point.

MAX ROSNER.

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