Abstract: Instead of creating hand railings by joining together sections of rectangular hollow tubing using mitre cuts and welding of the abutting cut ends, a metal knuckle is welded to the straight ends of such tubing. The knuckle has a body with a rectangular cross-section and in profile a circular sector with an included angle less than 180.degree.. Each end of the knuckle is formed as a pyramidal frustum that is adapted to enter the straight end of the tubing. A notch of generally triangular cross-section is created to hold welding bead between an end of the tubing and a respective frustum end of the knuckle. The notch size increases with the thickness of tubing inserted over the frustum end, and filling the notch with welding bead will automatically increase the joint strength as tubing thickness increases.

Abstract: An applicator for applying seamless flooring material to a subfloor is disclosed. The preferred embodiment includes a chassis steerably mounted on wheels which are propelled by hydraulic motors in series. A dispensing hopper on a frame is towed behind the chassis from a shaft on a steering column and enabled to move in three dimensions independent of the chassis. The hopper is supported by hopper wheels with an axle directly above a screed blade which distributes the flooring material dispensed out of the hopper. The height of each side of the hopper is independently adjustable on each side by screw-threaded rods and is not disrupted by lifting the hopper out of operation.

Abstract: An applicator for applying seamless flooring material is disclosed. The preferred embodiment includes a chassis steerably mounted on wheels. A hydraulic pump pumps fluid in series through hydraulic motors on the wheels to provide propulsion. A dispensing hopper is supported at the rear end of the chassis with the height of the hopper adjustable on each side. The applicator is part of a seamless flooring material application system, which additionally includes a forklift liftable dumpster, top-fillable with flooring material from mixing apparatus and positionable above the dispensing hopper of the applicator, and bottom-openable to dump the flooring material into the applicator hopper.