Abstract: Buoys are used for mooring purposes and as navigational marks. An embodiment of the invention is be explained in relation to catenary anchor leg mooring (CALM) buoys. Conventional CALM buoys generally have a hull constructed of steel plate by traditional ship building techniques requiring plate benders. Webs, beams and girders are welded inside the hull which is divided into several tanks. The buoy has a central moonpool and a steel turntable. Bending plate, in effect, doubles its cost. A method of constructing a buoy is disclosed, comprising: constructing a framework and affixing flat steel plate to it.

Abstract: Buoys are used for mooring purposes and as navigational marks. An embodiment of the invention is explained in relation to catenary anchor leg mooring (CALM) buoys. Conventional CALM buoys generally have a hull constructed of steel plate by traditional ship building techniques requiring plate benders. Webs, beams and girders are welded inside the hull which is divided into several tanks. The buoy has a central moonpool and a steel turntable. Bending plate, in effect, doubles its cost. A method of constructing a buoy is disclosed comprising constructing a framework and affixing steel plates to it.

Abstract: The perforated roller of a friction spinning unit includes an outer sleeve having vent openings at one end to provide an air leakage path which by-passes the adjacent bearing of the sleeve, and further by-passing vent passages radially outwardly of the bearing at the opposite end of the sleeve.