Modular screw anchor having lead point non-integral with...

E - Fixed Constructions – 02 – D

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61/92, 20/117.7

E02D 5/80 (2006.01)

Patent

CA 1138617

MODULAR SCREW ANCHOR HAVING LEAD POINT NON-INTEGRAL WITH HELIX PLATE Abstract of the Disclosure A high strength, modular screw anchor is disclosed which exhibits enhanced failure resistance notwithstanding use of essentially the same amount of material as conventional anchors, and which can be installed using existing installation equipment. The preferred screw anchors of the invention include an elongated rod having one or more separate, specialized anchor members supported thereon, and an improved, obliquely oriented, beveled earth- penetrating lead to facilitate installation, particularly in rocky soils. The anchor member includes a tubular, central, rod-receiving hub presenting a polygonal in cross-section bore therethrough, and an outwardly extending helical blade affixed to and coaxial with the hub. In installation procedures the anchor rod is passed through the hub bore and the anchor member is operably coupled to the rod (as by resting it atop an outwardly extending shoulder provided on the rod); the tubular shank of a standard anchor wrench is next telescoped over the anchor rod and inserted into the hub bore such that a driving connection is established between the rod, shank and anchor member. Axial rotation of the wrench thus effects corresponding rotation of the screw anchor for installation purposes. The earth- penetrating lead of the screw anchor may be formed integrally with the major portion of the rod, or threaded thereon; in the latter case the overall length of the rod can be adjusted as desired. The (Docket No. 16993) modular nature of the screw anchors hereof permits stocking of only a relatively few standard compo- nents which can be used as needed in the field to achieve a desired anchor configuration.

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