Patent ID: 6520065
Filing Date: 2003-02-18
Classification: F15B,F16J

Abstract:
A cylinder including a piston and a piston rod to be integrally displaced along a cylinder chamber under the action of a pressurized fluid fed to said cylinder chamber through pressurized fluid inlet/outlet ports, comprising:a cylinder tube having a non-cylindrical outer periphery extending in a circumferential direction around said cylinder chamber and a pair of upright surfaces on respective ends of said cylinder tube, said outer periphery of said cylinder tube comprising an upper surface, a pair of sloped surfaces extending from said upper surface, a pair of side surfaces extending from said slopes, and a bottom surface extending to said side surfaces, wherein chamfered portions are formed between said upper surface and said pair of slopes, between said slopes and said side surfaces and between said pair of side surfaces and said bottom surface, respectively, and each of said upper surfaces, said pair of sloped surfaces, said pair of side surfaces and said bottom surface comprises a convexly curved surface having a predetermined radius of curvature.