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    • 6. 发明申请
    • PISTON WITH BUILT-IN SEAL
    • 活塞密封
    • US20090235815A1
    • 2009-09-24
    • US12440536
    • 2007-08-23
    • Tomoaki NishimuraJunichi Ishiyama
    • Tomoaki NishimuraJunichi Ishiyama
    • F16J1/00
    • F16D25/12F16D25/0638F16D2048/0212F16J15/3236F16J15/56
    • A piston with a built-in seal comprises a piston body (121) formed of a metal press-formed part and axially movably disposed in a clutch cylinder (110) and seal lips (122, 123) formed integrally with the piston body (121). A through tubular guide projection (124) is formed on the piston body (121). A return spring (150) for biasing the piston body (121) toward the pressurizing chamber (A) side is held on the guide projection (124). Since the press-formed through tubular guide projection (124) is higher in projecting height than the bottomed tubular one, the length over which the return spring (150) is held is longer. A pressurizing chamber (A) is prevented from being opened by the guide projection (124).
    • 具有内置密封件的活塞包括由金属压制成形部分形成的轴向移动地设置在离合器缸(110)中的活塞体(121)和与活塞体(121)一体形成的密封唇(122,123) )。 在活塞主体(121)上形成贯通的管状引导突起(124)。 用于将活塞体(121)朝向加压室(A)侧偏置的复位弹簧(150)保持在引导突起(124)上。 由于压制成型的通过管状引导突起(124)的突出高度高于有底的管状突出部,所以复位弹簧(150)保持的长度较长。 防止加压室(A)被引导突起(124)打开。