US2633212A

US2633212A - Ground anchor

Info

Publication number: US2633212A
Application number: US108155A
Authority: US
Inventors: Alwin G Steinmayer
Original assignee: McGraw Electric Co
Current assignee: McGraw Electric Co
Priority date: 1949-08-02
Filing date: 1949-08-02
Publication date: 1953-03-31
Anticipated expiration: 1970-03-31

Description

March 31, 1953 A. G. STEINMAYER GROUND ANCHOR Filed Aug. 2, 1949 2 SHEETS-SHEET 1 EAJC' 52 IN VEN TOR.

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dciorneq March 31, 1953 A. G. STEINMAYER 2,633,212

GROUND ANCHOR Filed Aug. 2, 1949 2 SHEETS-SI-IEET 2 IN V EN TOR.

. Jfllarney Patented Mar. 31, 1953 GROUND ANCHOR Alwin G. Steinmayer, Milwaukee, Wis.,, assignor to McGraw Electric Company, a corporation of Delaware Application August 2, 1949, Serial No. 108,155

3 Claims.

. This invention relates to ground anchors. vGround anchors are employedto secure guy wires. The ground anchors arev usuallyinserted in a hole which is of smaller diameter than the expanded width or diameter of the ground anchor and when so inserted, the blades or fiukes are forced outwardly so that they dig into and underhang the undisturbed ground. Thereafter the hole is refilled above the blades.

Objects of this invention" are to provide a groundanchor of the expanding type which may be made of a very small number of parts and, except for the anchor rod, may be formed of stampings from heavy sheet metal, thus materially reducing the cost of manufacture.

Further objects are to provide an expanding ground anchor which may be shipped to the customer either in the knock-down or in the assembled condition to thus conserve the space required for packing, and which is arranged to use identical flukes or blades so that one die can serve to form both blades, and in which the blades are interlocked and are held against detachment from each other by means of the anchor rod.

An embodiment of the invention is shown in the accompanying drawings, in which:

Figure 1 is a side elevation of the anchor. Figure 2 is a plan view of one of the blades or fiukes before the interlocking tongues have been bent.

Figure 3 is a fragmentary view corresponding to a portion of Figure 2 showing in imaginary lines the second blade and showing the blades in their-interlocking relation.

7 Figure 4 is a view corresponding to Figure 1 but taken at right angles to that of Figure 1 and showing the ground anchor broken off.

Figure 5 is an enlarged sectional view on the line 55 of Figure 4.

are provided with a centrally located approxiv mately semi-circular notch or opening 4. If desired, the blades may be provided with tongues 5 which act temporarily as locking members as will be-explained hereinafter.

The base of the anchor or, in other words, the member which is effective in expanding or spreading the blades is indicated by the reference character 6 and is a stamping of heavy sheet metal and is circular in contour. It is generally of the shape of a truncated cone and has slanting substantially conical sides or faces 1, and for strengthing purposes has a depressed central or cup-shapedportion 8 as shown most clearly in Figure 1. It is also provided with diametrically opposed holes 9 which temporarily receive the tongues 5'of the blades or flukes l. The base 6 is centrally apertured and an anchor rod It) passes therethrough. This anchor rod has its lower portion threaded and receives the nut II which bears against the depressed portion 8 of the base; The upper end of an anchor rod is formed as an integral eyelet and is adapted to receive the guy wire.

Figure 5 shows the manner in which the small locking tongues temporarily interlock with the body portion. This is merely to hold the blades in place while they are being inserted into the hole and as soon as the blades are spread, the temporarily effective locking tongues 5 slide freely from the openings 9.

It is to be understood that the tongues 2 are bent over after the blades have been initially stamped from the sheet metal and are interlocked and occupy the position shown in Figure 1 when the anchor is not expanded, and they occupy the position shown in Figure 6 when the anchor is expanded. It is also to be noted that the blades or fiukes I are slightly dished so that they will freely dig into the ground and also will, because of this shape, have a little firmer or more effective anchoring effect.

In using the device, the hole of the proper diameter, slightly greater than that of the base 6, is dug in the ground and the anchor is inserted in its closed condition shown in Figure 1. Thereafter a pounding member, not shown, is used to pound downwardly on the heels of the curved portions I3 of the blades and to thus cause the blades to travel outwardly to the position shown in Figure 6 by coacting with the expanding member or base 6.

If desired, the anchor may be shipped to the customer in knock-down condition and he may thereafter assemble it or it can be shipped to the customer in its fully assembled condition as shown in Figure 1. i

It will be seen that a very simple and cheaply produced ground anchor has been provided most of whose parts are formed from stampings.

It Willalso be seen that a minimum number of parts are employed and that a very secure anconsiderable detail, it is to be understood that such description is intended as illustrative rather than limiting, as the invention may be variously embodied and is to be interpreted as claimed.

I claim:

1. A ground anchor for guy wires comprising a pair of opposed flukes having bayonet slots providing detachably interlocking tongues and each fluke provided with an approximately centrally located cut-out portion, an anchor rod passing through the cut-out portion in each of said nukes and preventing detachment of ,said interlocking tongues, and a spreading member for spreading said tongues carried by the lower'end of said an chor rod, said anchor rod having a guy wire receiving means at its upper end, the slots in one fluke having a loose fit with the tongues of the other fluke to provide free hinging of the flukes.

2. A ground anchor for guy wires comprising a pair of identical flukes positioned back to back and having bayonet slots providing laterally interlocking tongues which are laterally detachable from each other and each fluke having an approximately centrally located cut-out portion, an 2 3. A ground anchor for guy wires comprising a pair of identical flukes positioned back to back and having bayonet slots providing laterally interlocking tongues which are laterally detachable from each other and each fluke having an approximately centrally located cut-out portion, an anchor rod passing through the cut-out portions of said flukes and preventing lateral detachment of said tongues, said anchor rod having guy wire receiving means at its upper end, and a spreading member carried by the lower end of said anchor rod, said interlocking tongues having bent portions providing heels which constitute surfaces that may be pounded on during spreading operation of said flukes, the slots in one fluke having a loose fit with the tongues of the other fluke to provide free hinging of the fiukes.

ALWIN G. S'IEINMAYER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS