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公开(公告)号：US5078632A
公开(公告)日：1992-01-07
申请号：US569143
申请日：1990-08-17
CPC分类号： B63H20/245 , B63H2005/103
摘要： To reduce engine exhaust gas pressure behind a motorboat propeller formed with a boss for educing engine exhaust gas therethrough, without forming a trumpet-shaped boss end and without allowing exhaust gas to flow upstream along the boss outer surface, a single or plural small subblades are provided between two adjacent large main blades at such a position that a positive pressure domain produced by the subblade reduces a negative pressure domain produced by the main blade. Since engine exhaust gas can be effectively educed, engine power increases and therefore motorboat acceleration performance can be improved.
摘要翻译： 为了减少形成有用于通过其引导废气的凸台的摩托艇螺旋桨后面的发动机排气压力，而不形成喇叭形凸台端，并且不允许废气沿着凸台外表面向上游流动，单个或多个小的子叶片 设置在两个相邻的大主叶片之间，使得由下刀片产生的正压力域降低由主叶片产生的负压域。 由于可以有效地引导发动机废气，所以发动机功率增加，因此可以提高摩托艇加速性能。
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公开(公告)号：US4801282A
公开(公告)日：1989-01-31
申请号：US16919
申请日：1987-02-20
申请人： Toshimitsu Ogawa , Shinichi Kudo
发明人： Toshimitsu Ogawa , Shinichi Kudo
CPC分类号： B63H21/213 , F02B61/045 , Y10T74/20232
摘要： An apparatus for controlling a plurality of driving units comprises a lever device pivotable to operate each driving unit, and a switch device having a plurality of switches each for changing the position of a driving portion of each driving unit. The switch device is disposed in the lever device such that the lever device and thed plurality of switches are simultaneously manually operated.
摘要翻译： 用于控制多个驱动单元的装置包括可转动以操作每个驱动单元的杠杆装置，以及具有多个开关的开关装置，每个开关用于改变每个驱动单元的驱动部分的位置。 开关装置设置在杠杆装置中，使得杠杆装置和多个开关同时手动操作。
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