Abstract: A bone screw system is presented. The bone screw system has a fixation element, a receiving element, coupling element, and a compression element. In one aspect, the fixation element is adapted to engage a bone and has a head portion and a threaded shank portion.

Abstract: A bone screw system is presented. The bone screw system has a fixation element, a receiving element, coupling element, and a compression element. In one aspect, the fixation element is adapted to engage a bone and has a head portion and a threaded shank portion.

Abstract: A safety directional line for underground mining that can be adjusted during to conform with any local codes. The line is constructed from high strength polypropylene which is non-conductive. A flame retardant is added to the polypropylene to make it flame resistant. There are flame retardant and non-conductive directional indicator cones evenly spaced and positioned such that they are pointing along the axis of the line. The cones are placed on the line such that when someone is exiting the mine his hand slides along the slope of the cone and meets little resistance. In the event that the miner is traveling the wrong direction, his hand will meet the flat surface of the cone and come to a stop, indicating that he is traveling in the wrong direction. There is fluorescent tape on the cones to make it more clearly visible to one trying to exit the mine. The tape is formed in an X on the flat surface of the cone indicating that it is the wrong direction.

Abstract: A rope or line having a permanent loop of fixed diameter spliced in each end thereof provides for the suspension of innumerable articles in various industries, but is particularly well suited for use in underground mining, where it may be used to support continuous miner machine cables, electric, pneumatic, and hydraulic lines, air ventilation ducts, etc., above the floor of the mine drift. The line is preferably formed of a braided synthetic fiber which has been treated to provide flame retardant properties and which is also electrically non-conductive. Treated, braided polypropylene is a suitable material for the present double looped line. The closed loops are formed by passing the first end of the line diametrically through its opposite portion, and then coaxially through that same portion and diametrically through the portion captured within the hollow braided core to secure the first end therein and to form a closed loop.

Abstract: A hanger loop of rope material provides for the suspension of innumerable articles in various industries, but is particularly well suited for use in underground mining, where it may be used to support electrical cables, pneumatic and hydraulic lines, air ventilation ducts, etc., above the floor of the mine drift. The hanger loop is preferably formed of a braided synthetic fiber which has been treated to provide flame retardant properties and which is also electrically non-conductive. Treated, braided polypropylene is a suitable material for the present rope loop. The closed loop is formed by passing the first end of the rope diametrically through its opposite end portion, and then coaxially through that same portion to secure the first end therein and to form a smaller closed loop. The second end is then inserted coaxially into the body of the main loop to secure the second end within the body of the main loop.