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    • 13. 发明授权
    • Radio communication system
    • 无线通信系统
    • US06640100B1
    • 2003-10-28
    • US09340902
    • 1999-06-28
    • Satoshi KojimaAkira HiraoJunichi KimuraKatsushi Koyama
    • Satoshi KojimaAkira HiraoJunichi KimuraKatsushi Koyama
    • H04Q720
    • H04W84/14
    • A large-capacity WLL base station 7 as a wireless local loop base station is wirelessly linked to a PHS radio station 10 of about 10 channels which accepts the connection thereto of various PHS terminals 12 and a fixed subscriber's terminal 11 which can accommodate a plurality of fixed telephone sets 13, by use of a PHS band different from that of the PHS terminal 12. The fixed subscriber's terminal 11 and the PHS radio station 10 are located within one communication area of the large-capacity WLL base station 7. Thereby, it is provided a radio communication system which provides efficient construction of wireless communications facilities by locating subscribers of a wireless local loop and a base station for microcell-basis, portable communication terminals within a communication area.
    • 作为无线本地环路基站的大容量WLL基站7被无线地链接到约10个信道的PHS无线电台10,该10个信道接受各种PHS终端12和固定用户终端11的连接,固定用户终端11可以容纳多个 固定电话机13,通过使用与PHS终端12不同的PHS频带。固定用户终端11和PHS无线电台10位于大容量WLL基站7的一个通信区域内。由此, 提供了一种无线电通信系统,其通过定位无线本地环路的用户和在通信区域内的基于微小区的便携式通信终端的基站来提供无线通信设施的有效构造。
    • 15. 发明授权
    • Internally meshing planetary gear structure and flexible meshing type
gear meshing structure
    • 内啮合行星齿轮结构和柔性啮合型齿轮啮合结构
    • US5388483A
    • 1995-02-14
    • US71019
    • 1993-06-02
    • Toshihiro IshidaYuzo OguraAkira Hirao
    • Toshihiro IshidaYuzo OguraAkira Hirao
    • F16H1/32F16H55/08F16H33/00
    • F16H55/0833F16H1/32F16H49/001Y10T74/19
    • An internally meshing planetary gear structure or a flexible meshing type gear meshing structure is intended to achieve the lightening, miniaturization and high load capacity by increasing the meshing points of the gear even is the difference in the teeth number between the external gear and the internal gear is two or more. The difference in the teeth number between each of the external gears and the internal gear is set to be N (N: integer being two or more), the tooth profile of the external gear is constructed on the basis of the innermost curve of the epitrochoid parallel curves in N pieces which are superposed to be shifted in phase from each other, and the tooth profile of the internal gear is constructed on the basis of the innermost curve of the trochoid internally enveloping curves in N pieces which mesh with the above epitrochoid parallel curves and which are superposed to be shifted from each other by the same phase as in the external gear.
    • 内啮合的行星齿轮结构或柔性啮合型齿轮啮合结构旨在通过增加齿轮的啮合点来实现轻量化,小型化和高负载能力,即使外齿轮与内齿轮之间的齿数差 是两个或更多。 每个外齿轮和内齿轮之间的齿数差设定为N(N:2以上的整数),外齿轮的齿廓基于外卷轴的最内侧曲线构成 叠合成相互相移的N个平行曲线,并且内齿轮的齿廓基于与上述外卷轴平行啮合的N个部件中的次摆线内包络曲线的最内侧曲线构成 曲线,并且它们被叠加成与外齿轮相同的相位。