Abstract: Each boot of a tripot type constant velocity joint comprises a polyester-based thermoplastic elastomer (TPC). A grease encapsulated in the boot comprises a base oil, a thickening agent comprising a diurea-based compound, molybdenum dialkyldithiocarbamate sulfide, a sulfur-phorsphorous based extreme-pressure agent being a sulfur-phosphorus based compound containing sulfur and phosphorous as constituting elements, and potassium borate hydrate.

Abstract: A grease composition to be encapsulated in a boot made from TPC for use in a tripot type constant velocity joint having a base oil, a thickener of a urea based compound, a solid molybdenum dithiocarbamate and an alkali metal borate hydrate, wherein the liquid component in the grease composition has a sulfur content of 0.6 mass % or less relative to the total amount of the liquid component.

Abstract: There is provided a coating film applied onto structural members of automotive body, such as drive shaft, which coating film is formed by hardening of a coating composition comprising an epoxy resin powder coating material and at least either a polyolefin resin or a modified olefin resin containing a polar group. As the polyolefin resin or modified olefin resin containing a polar group, there can be selected those of 0.1 to 80 g/10 min melt index at 190° C. and ?100° to ?20° C. brittle temperature. In the coating composition, the ratio between epoxy resin powder coating material and polyolefin resin or modified olefin resin containing a polar group on a weight ratio basis is set for 1 to 70 : 99 to 30.

Abstract: Each boot of a tripot type constant velocity joint comprises a polyester-based thermoplastic elastomer (TPC). A grease encapsulated in the boot comprises a base oil, a thickening agent comprising a diurea-based compound, molybdenum dialkyldithiocarbamate sulfide, a sulfur-phorsphorous based extreme-pressure agent being a sulfur-phosphorus based compound containing sulfur and phosphorous as constituting elements, and potassium borate hydrate.

Abstract: A housing has, on an outer circumferential surface thereof, a circumferential surface area, a toothed surface area complementary in shape to grooves and teeth of a boot of rubber, and a stopper engagable by tip ends of the boot of rubber and a boot of synthetic resin. The circumferential surface area, the toothed surface area, and the stopper are successively arranged in the order named in the direction in which the boots are installed onto a rotary joint. The housing has an outside diameter at the circumferential surface area which is equal to or greater than an inside diameter of the boot of synthetic resin. The circumferential surface area, circumferential teeth of the toothed surface area, and the stopper are progressively higher radially outwardly in the order named.