Abstract: A fastening system for securing an article to a base uses a conventional drive fastener. A reaction surface on the article contacts the bearing surface on the underside of the fastener head causing the fastener head to tilt relative to the body of the fastener. The reaction surface also causes the body of the drive fastener to deform when it is fully driven into the article, and a portion of the material from the reaction surface is displaced into the aperture to increase the retention force of the fastener.

Abstract: A lawn spike for anchoring objects, such as lawn edging, within a lawn utilizes a head and a pointed plastic shank shaped to enhance the strength of the shank and to cooperate with the ground, when operatively driven therein, to resist withdrawal of the spike therefrom. The shank includes a substantially cylindrical main section and a plurality of frusto-conical sections positioned about and spaced along the length of the main section so that each of the frusto-conical sections tapers toward the pointed end of the shank. The shank portion also includes a plurality of strengthening ribs formed with and extending longitudinally along the cylindrical periphery of the main section and which are also formed with so as to be joined to adjacent frusto-conical sections.

Abstract: A stake is provided in the form of a smooth cylindrical metal rod which has a point at its lower end and to which is welded a screw thread formed by a helical spring having a polygonal cross-section, preferably a square section, which is welded to the rod at a limited number of spaced-apart points, at least a part of the spring being thus free to move with respect to the rod. Preferably, only the lower end of the spring is welded to the rod. The stake is more especially, but not exclusively, usable for measuring the electrical resistances of ground connections.

Abstract: An anchor bolt (10) for use in concrete or masonry is described. The bolt is formed of an integral shaft (13) having an elongate round holding portion (12) defining a cylindrical surface with at least one helical or spiral patterned weld line (14) along the surface. The bolt is positioned in the concrete by being forced into a hole (101) having the same diameter as the shaft such that it rotates or turns as it is being forced into the hole due to the helical patterned weld line. The anchor bolt resists pulling from the concrete and is particularly adapted for use in holding machinery on concrete floors and in construction purposes in concrete flooring.