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热词
    • 67. 发明授权
    • Diaphragm vacuum pump
    • 隔膜真空泵
    • US3981636A
    • 1976-09-21
    • US628403
    • 1975-11-03
    • Shigeru AokiKatuya SuzukiTosimitu Sakai
    • Shigeru AokiKatuya SuzukiTosimitu Sakai
    • F04B9/06F04B39/10F04B45/04F04B21/02F16K15/14
    • F04B45/04F04B39/108F04B9/06Y10T137/784Y10T137/786
    • To suck and discharge the air into and from a pressure reducing chamber of a vacuum pump, a check valve comprises a valve body made of plastic material in a mushroom configuration, and a plate member which includes a flat valve seat surface to be engaged with the annular rim of the cap portion of the valve body, an assembling hole to be coupled with the neck portion of the valve body, and a plurality of openings positioned symmetrically on a circle concentric with the assembling hole to normally be closed by the cap portion of the valve body. The neck portion of the valve body is assembled with the assembling hole under axially and radially compressed condition to air-tightly engage the annular rim of the cap portion of the valve body on the valve seat surface.
    • 为了将空气吸入和排出真空泵的减压室,止回阀包括由蘑菇构造的塑料材料制成的阀体,以及板构件,其包括与阀座表面接合的扁平阀座表面 阀体的盖部分的环形边缘,与阀体的颈部部分联接的组装孔和多个开口,其对称地位于与组装孔同心的圆上,以通常由帽部分封闭 阀体。 阀体的颈部与轴承和径向压缩状态下的组装孔组装在一起,以气密地接合在阀座表面上的阀体盖部分的环形边缘。