Abstract: An apparatus for protecting and prolonging the functional life-span of artificial fishing lures comprising a tubular body having a cylindrical portion integrally connected to a conically tapered portion which tapers radially inwardly to define an orifice. A bayonet styled slot is defined in the wall of said cylindrical portion and extends a predetermined distance from said open end toward said orifice. The bayonet slot is comprised of a longitudinal portion, an annular portion and a notch. The longitudinal portion may instead be a helical portion helically oriented along the wall of said cylindrical portion. A fishing line is threaded through the orifice in the conically tapered portion, then through a weight, then tied to an eyelet on a hook which is attached to a lure. The combination of weight, hook and lure is then concomitantly urged into said tubular body such that the weight frictionally engages the internal surface of the conically tapered portion.

Abstract: An anchor for securing a mine roof bolt within a hole preformed within a rock strata. The anchor comprises a plurality of transversely bent plastic leaves, each having an aperture through which the roof bolt is received, a support nut threadably connected to the bolt for supporting the plastic leaves, a stirrup supported on the support nut and on which the leaves are rested and a bifurcated compression nut having a biasing member threadably connected to the roof bolt and a horizontal member slidably connected to the bolt below the biasing member and above the leaves for compressing the leaves against the stirrup responsive to the rotation of the roof bolt in a selected direction. As the transversely bent leaves are compressed the edges thereof are urged against the strata to grip the same and thereby secure the roof bolt within the hole. The stirrup and the horizontal member are shaped to maintain the leaves at a selected inclination during compression.

Abstract: An anchor for securing a mine roof bolt within a hole preformed within a rock strata. The anchor comprises a plurality of transversely bent plastic leaves, each having an aperture through which the roof bolt is received, a support nut threadably connected to the bolt for supporting the plastic leaves, a stirrup supported on the support nut and on which the leaves are rested and a compression nut threadably connected to the roof bolt above the leaves for compressing the leaves against the stirrup responsive to the rotation of the roof bolt in a selected direction. As the transversely bent leaves are compressed the edges thereof are urged against the strata to grip the same and thereby secure the roof bolt within the hole. The stirrup and the compression nut are shaped to maintain the leaves at a selected inclinations during compression.

Abstract: A mine roof bolt expansion anchor utilizes a plurality of transversely bent elongated leaves which are compressed within a bail by the rotation of the roof bolt. The compression results in movement of the leaves toward a flattened position whereby the outer edges of the leaves engage the bore hole walls to anchor the bolt. Downwardly extending flanges on each end of the leaves increase the bearing surface which engages the bore hole wall, while spacers near the center of the leaves act as a spine to evenly distribute the compression to all the leaves so that they all engage the bore hole wall simultaneously and with the same pressure.