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41. 发明授权

US5231902A Pneumatically operated screw driver 失效
标题翻译：气动螺丝刀
公开(公告)号：US5231902A
公开(公告)日：1993-08-03
申请号：US893000
申请日：1992-06-03
申请人： Akira Uno , Yasuyuki Hirano , Satoshi Kuno , Isamu Tanji , Yasuki Ohmori
发明人： Akira Uno , Yasuyuki Hirano , Satoshi Kuno , Isamu Tanji , Yasuki Ohmori
IPC分类号： B25B21/00 , B25B23/04
CPC分类号： B25B21/00 , B25B23/045
摘要： A pneumatically operated screw driver having a pneumatically operated rotor rotatably supported in an outer frame. The rotor is only rotatable about its axis. A moving unit is slidably disposed within the rotor. The moving unit has an upper piston and is axially movable upon application of pneumatic pressure to the upper piston. The moving unit is also rotatable about its axis because of spline connection with the rotor. A valve is disposed for selectively applying the pneumatic pressure to the piston and to the rotor. Upon application of the pneumatic pressure, the moving unit is moved downwardly, and the pneumatic pressure is then introduced into the rotor for rotating the same. The rotation of the rotor is transmitted to the moving unit. The valve closes a fluid passage directing to the piston and to the rotor when the moving unit has the lowermost position.
摘要翻译：一种气动螺丝刀，其具有可旋转地支撑在外框架中的气动转子。转子只能围绕其轴线旋转。移动单元可滑动地设置在转子内。移动单元具有上活塞并且当向上活塞施加气动压力时可轴向移动。由于与转子的花键连接，移动单元也可围绕其轴线旋转。阀被设置用于选择性地将气动压力施加到活塞和转子。在施加气动压力时，移动单元向下运动，然后气动压力被引入转子以使其旋转。转子的旋转传递到移动单元。当移动单元具有最低位置时，阀关闭指向活塞和转子的流体通道。

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