VALVE STRUCTURE FOR TUBE FITTING

• Main Authors: ISHIHARA TOMIO, TAKANO TETSUO, SUZUKI TERUHISA, KOIDE MOTOHISA
• Format: Patent
• Language: English
• Published: 27.06.2003
• Edition: 7
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; JOINTS OR FITTINGS FOR PIPES; LIGHTING; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide a valve structure for a tube fitting capable of ensuring a stable sealing property even when the valve is inclined, realizing a small size and a light weight of a product and being manufactured at low cost. SOLUTION: A contact surface 6Y at an inner periphery side of a butted end surface Q side of a valve body 3a of a female coupling 3 and a valve body 4a of a male coupling 4 is formed into a recessed spherical surface as shown in Fig. 2. A contact surface 6X of an outer periphery at a tip end side of the valve 1B fitted and contacted with the contact surface 6Y of the recessed spherical surface is formed into a projected spherical surface. A sealing material 5b made of rubber is buried in the contact surface 6X of the outer periphery at the tip end side of this valve 1B. It is also possible that the recessed spherical surface is formed on the contact surface 6X of the outer periphery at the tip end side of the valves 1A, 1B and the projected spherical surface is formed on the contact surface 6Y of the valve bodies 3a, 4a. COPYRIGHT: (C)2003,JPO