Abstract: This invention provides a tube having durability against harsh flexion, shrinkage, torsion, or the like and reduced slip resistance between tubes or upon contact with another member. Such tube is used for a product comprising a site at which a plurality of tubes are fixed at both ends and tied together with each other and/or in contact with another member, and the sites of fixation at the both ends are sites of motion at which reciprocal movement is repeated. Such tube is obtained via extrusion molding of a thermoplastic polyether ester elastomer and has a satin-finished outer surface. The invention also provides a method for preparing such tube.

Abstract: A pressure-receiving face plate 29 is mounted on one end face of a piston 12, and a support member 26 is raised on the end face of the piston 12. Disposed on the support member 26 with an allowance are, from the pressure-receiving faceplate 29 respectively, a disk spring 27, a plate 25, and a plunger 28. A flange 26a prevents these members from slipping off the support member 26. When the piston 12 approaches a stroke end, the plunger 28 is inserted in an oil passage 20b and applies a cushioning effect to the piston 12. In addition, a gap between the pressure-receiving faceplate 29 and the plate 25 brought into contact with a cylinder bottom 17 becomes narrow, and produces a squeeze effect such that oil escapes from the narrow gap. This makes it possible to provide a hydraulic cylinder that produces a sufficient impact force at the stroke end of the piston and also reduces noise emitted by the impact force, without increasing a length of the hydraulic cylinder.

Abstract: This invention provides a tube having durability against harsh flexion, shrinkage, torsion, or the like and reduced slip resistance between tubes or upon contact with another member. Such tube is used for a product comprising a site at which a plurality of tubes are fixed at both ends and tied together with each other and/or in contact with another member, and the sites of fixation at the both ends are sites of motion at which reciprocal movement is repeated. Such tube is obtained via extrusion molding of a thermoplastic polyether ester elastomer and has a satin-finished outer surface. The invention also provides a method for preparing such tube.

Abstract: A pressure-receiving face plate 29 is mounted on one end face of a piston 12, and a support member 26 is raised on the end face of the piston 12. Disposed on the support member 26 with an allowance are, from the pressure-receiving faceplate 29 respectively, a disk spring 27, a plate 25, and a plunger 28. A flange 26a prevents these members from slipping off the support member 26. When the piston 12 approaches a stroke end, the plunger 28 is inserted in an oil passage 20b and applies a cushioning effect to the piston 12. In addition, a gap between the pressure-receiving faceplate 29 and the plate 25 brought into contact with a cylinder bottom 17 becomes narrow, and produces a squeeze effect such that oil escapes from the narrow gap. This makes it possible to provide a hydraulic cylinder that produces a sufficient impact force at the stroke end of the piston and also reduces noise emitted by the impact force, without increasing a length of the hydraulic cylinder.