Threaded fastener

Abstract: Introductions: Standards, Codes, Regulations. Statistical Considerations. Measurement and Inference Numerical Methods. Computational Considerations. Wear. Solid Materials. The Strength of Cold-Worked and Heat-Treated Steels. Usability. Safety. Minimizing Engineering Effort. Strength Under Static Circumstances. Fundamentals of Arc Welding. Instabilities in Beams and Columns. Curved Beams and Rings. Seals. Flywheels. Limits and Fits. Power Screws. Threaded Fasteners. Unthreaded Fasteners. Bolted and Riveted Joints. Springs. Lubrication. Gaskets. Rolling-Contact Bearings. Journal Bearings. Couplings. Clutches and Brakes. Belt Drives. Chain Drives. Spur Gears. Bevel and Hypoid Gears. Helical Gears. Worm Gearing. Shafts. Vibration and Control of Vibration. A Thesaurus of Mechanisms. Cam Mechanisms. Linkages. Load-Cycle Analysis. Fluid Power Systems and Circuit Design. Corrosion. Noise and Its Control. Gear Trains. Robots and Smart Machines. Sections and Shapes-Tabular Data. Stress. Deflection.

Abstract: A solar collector array is formed of a plurality of solar panels mounted on a frame made of support beams which may be sheet metal channel members. A butyl tape or other glazing material is applied between the back laminate of the solar panel and the beam. Clips are used to clamp the panels to the support beams. The clips have an upper portion that is generally T-shaped in profile, and a retainer in the form of a channel nut or bar, with a threaded hole that receives a bolt or similar threaded fastener. The retainer biases against the inwardly directed flanges of the channel support beam. Electrical wires and mechanical fasteners are concealed within the support beams.

Abstract: An anterior cervical plate (22) is disclosed, along with threaded fasteners (24a-24d) for securing the plate to vertebrae (18, 20) or other osseous material. The cervical plate (22) has several pockets or apertures (30a-30d), preferably at least four, to receive a corresponding number of the fasteners (24a-24d). The pockets have spherical surfaces (34), and the fasteners have heads with similarly sized spherical surfaces (48), which when engaged permit each of the fasteners to be oriented at a variety of projection angles with respect to the plate (22). In connection with each pocket (30a-30d), the cervical plate (22) incorporates a fastener retaining feature (40). The feature can take the form of a cantilevered tab or a beam supported at its opposite ends, in each case plastically deformable between an open position for admitting the fastener and a closed position for preventing retraction.

Abstract: A device for supporting a spinal column includes a screw having a U-shaped head, a joining element received within the head, a threaded bolt received within and threadedly engaging the head, and a cap covering an upper portion of the head. The head is internally threaded. The threaded bolt engages the joining element to block relative movement between the joining element and the screw. The cap avoids spreading of the head upon tightening of the bolt in the head.