Abstract: A plastic protecting cap for the clamping on a polygon nut, with a cylinder casing, which overlaps the polygon nut. The technical problem of the present invention is the provision of a plastic protecting cap, which, by a turning movement, can be clamped safely and firmly on the polygon nut and can be released therefrom by turning in opposite direction again. On the internal face of the casing, at least, two axial profile webs are arranged at places corresponding to polygonal corners, each web comprises a groove profile, open against the axis, with a vertex angle equal to the polygon angle, the radial distance of the vertex of each groove profile from the profile axis being slightly smaller than the radial distance of each corner of the polygon nut profile from the profile axis, and one flange surface of the groove profile is longer, in circumferential direction, than the other flange surface.

Abstract: A cap of synthetic resinous material for securement over the head of a fastener, such as a bolt or screw type. The cap has a hollow head portion and a cap attachment portion. The head portion has a top wall and an integral annular side wall. The attachment portion is formed integral in the inner wall adjacent a circumferential free edge thereof and is constituted by an annular channel formed in the inner wall of the cap for receiving in snap-fit engagement therein a lower circumferential flange of a fastener head to secure the cap over the fastener head.

Abstract: An interlocking lock screw and screwdriver which prevents the specially designed screwdriver blade with guide dimples from slipping out of a specially designed screw head with a screwdriver guide channel and guide dimple entry apertures. The screwdriver may be used in any position including sideways and directly overhead. A rotational locking system is provided which allows a user to drive a staple or brad through the screw head locking it in place or a decorative locking cap may be used. A decorative non-locking cap is also provided which is easy to install yet easily stays in place.

Abstract: A cover of a nut according to the present invention is constituted of a resilient body, having a cavity shaped so as to be prevented from turning by an operating means formed on the nut for convenience of turning the nut adapted to be engaged with the bolt and being equipped with a tubiform basal portion receiving the periphery of the nut engaged with the bolt to be fitted within said cavity and a hollow swelled portion extending integrally from one of the ends of said basal portion and closed at an end located far from the basal portion. Said resilient body is provided with a disengagement-proof means preventing the cover applied over the nut from slipping out of the nut after displacing in the direction of the axis of the nut.

Abstract: The present invention relates to an electromagnetic shielding device. Further, the present invention relates to a arrangement for electromagnetic shielding of two adjacent relatively movable members having opposed surfaces with a space therebetween. The electromagnetic shielding device includes a resilient cap portion having a center portion and a plurality of segments extending radially outwardly therefrom. An arrangement for retaining the cap portion on one of the surfaces is provided. The retaining arrangement includes a thin disk adapted to be received between the segments of the cap portion and resilient tongues extending radially inwardly from an outer end of each of the segments. The cap portion in a free state has a height which is greater than the distance of the space between the opposed surfaces to be shielded. In this way, the cap portion is compressed to fit within the space upon movement of the members toward one another to ensure electrical connection between the two opposed surfaces.

Abstract: A screw member having a plurality of heads by providing one or more thin neck portions to be sheared at a predetermined torque, in which a collar having a skirt portion with its one part being cut away is fitted on the thin neck portion from the lateral side to expose the outer head part alone and to engage the cap member fitted from the side of the bearing surface of the inner head part of the screw member, and the cap member is inserted between the skirt of the collar and the inner head part to thereby prevent the collar from slipping out.

Abstract: A retrievable toggle bolt assembly characterized by a cup for receiving the hinged toggle elements as the bolt is unscrewed from a wall or ceiling panel. The cup is formed to provide indication as to complete attachment of the bolt to a cap carried thereon.

Abstract: A molded knob of the type which frictionally engages and slips over the end of a shaft of generally circular cross section and having at least one longitudinally extending flat surface. A hub is formed as part of the knob. A shaft receiving walled socket is formed in the hub. The socket has a flat wall adapted to engage the shaft. Side walls extending from the flat wall are positioned to contact the curved wall of the shaft. Abutments are located at the ends of the side walls distal from the flat wall and are positioned to engage the shaft. A resilient finger is located in the socket opposite the flat wall between the abutments and positioned to engage and apply pressure to the curved outer surface of the shaft. The abutments are dimensioned to engage the shaft to limit deflection of the resilient finger beyond that necessary to apply a force to the shaft.

Abstract: A two-piece knob assembly is provided for positively holding a fastener in a non-rotatable condition. The assembly includes a knob that has an aperture with varying diameters and configurations. A fastener is received in the aperture and is non-rotatably held therein due to the mating irregular configurations of the knob and the fastener. A cap is also received in the aperture to prevent the fastener from becoming dislodged in a vertical direction.

Abstract: A multi-part fastener assembly for attachment of a carpet-like member to a support. The fastener is designed to minimize snagging and/or scraping-type of engagement with objects that come in contact therewith. The exposed fastener part is an annular member which has a radiussed outer edge from which a plurality of rigid projections extend. The projections are designed to be able to penetrate the carpet-like member and a radially extending flange of another fastener part and be folded to fixedly position the fastener relative to the carpet-like member. The radially extending flange has areas of reduced thickness to ease the projections therethrough and is deflected to create an annular mounding of the carpet-like member around the annular member to cooperate therewith in increasing the resistance of the fastener to snagging type of engagement.

Abstract: Methods and apparatus are provided for protecting nuts and protruding threads of bolts from corrosion and damage. A cup-shaped cap is provided for sealingly enclosing the exposed threads. A suitable protecting fluid may be introduced through a charging port, and an expandable bladder protruding from the side of the cap indicates that the cap is maintaining the protective fluid under pressure. A nut cover is slidably mounted to the cap, and serves to protect the nut from the environment.

Abstract: A method for restraining transverse movement of the lower edges of a vertically hung sliding door which includes providing a nail-like pin driven into the flooring adjacent the lower edge of the door and a formed resilient cap force fitted over the top of the pin and having surfaces for slidingly abutting the lower edges of the door. The guides may be positioned at selected locations along the path of travel of the door, and may be accurately located by use of a template.

Abstract: A flush capped bolt system for attaching a plastic liner to a substrate includes a cap with a radial sealing skirt that seals against the walls of a counterbored recess at the liner surface. In the preferred embodiment, a squared portion on the bolt shank deforms a liner opening to provide a nonrotatable engagement, and there is a plastic wear washer to accommodate lateral movement allowed by an oversized substrate opening. The system is readily adapted for field installation using conventional tools.

Abstract: A mine bolt formed of continuous fiber reinforced pultruded rod-like reinforcing element is disclosed. This rod-like element includes at least one helical groove and/or protrusion along its length, with the continuous reinforcing fibers in the protrusions or surrounding grooves generally conforming to the helical pattern of the outer surface of the rod. The bolts formed by the instant invention also have utility in reinforcing such structures as mine roofs or concrete. The bolt of the instant invention comprises the above helically grooved rod fitted with an end cap that fits the helical turns of the grooved rod. The end cap may also serve as the mine roof plate.

Abstract: A guard for a mine roof bolt assembly is disclosed. The guard consists of a cap having a cavity into which the mine roof bolt head is inserted. The cavity wall includes serrations which grip the bolt head and secure the guard on it. A continuous annular skirt depends from the cap and extends outward to completely cover the bolt plate. The skirt curves in the radial direction towards the plate so that the guard presents a substantially smooth curved surface to a passing miner. The skirt includes cut-outs corresponding to the positions of hanger loops on the bolt plate. The guards may also include luminescent or colored material.

Abstract: A theft deterrent device for "bolting" pieces of material together, comprising:(1) a nut-like device having a smooth outer surface resistant to the effects of conventional wrenches,(2) a male threaded member having an internally threaded axial bore, adapted to threadedly engage the nut-like member,(3) a locking screw for threadedly engaging the internal bore of the male member, and having a head that mates with the smooth outer surface of the nut-like device, resulting in an essentially smooth, continuous outer surface resistant to removal using conventional wrenches, and(4) an environmental plug for inserting into the driving recess or bore of the screw to prevent foreign and corrosive matter from entering the recess. The locking screw threads are of opposite hand to that of the nut-like portion, so that the locking screw must first be removed before the nut may be removed.

Abstract: An improvement in post-type earrings, which are earrings connected to a human ear by a rigid slender short rod or post which extends from an ornament, and is rectilinear and cylindrical. The post is threaded at the end opposite to the ornament, and a clutch having a conical configuration formed by a concave base and a plurality of radial springy fingers is provided. The clutch is pushed onto the post, whereby the tips of the fingers engage the convolutions of the helical threading, and the clutch may only be removed by unscrewing it off of the post. The present clutch configuration features a concave base for self-locating of the post; an octagonal base perimeter for facilitating grip and unscrewing; convex rounded tips on the fingers; a center longitudinal ridge on each finger for increased strength and less weight; lateral end ridges adjacent the finger tips to prevent degradation or bending of the tips; and lateral base ridges on each finger which improve flexibility.