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1. 外观设计

USD296556S Bellows pump 失效
公开(公告)号：USD296556S
公开(公告)日：1988-07-05
申请号：US934146
申请日：1986-11-24
申请人： Norishige Hirakawa , Kazuhiko Sato , Satoru Hagiwara
设计人： Norishige Hirakawa , Kazuhiko Sato , Satoru Hagiwara

2. 外观设计

USD300034S Bellows pump 失效
公开(公告)号：USD300034S
公开(公告)日：1989-02-28
申请号：US934134
申请日：1986-11-24
申请人： Norishige Hirakawa , Kazuhiko Sato , Satoru Hagiwara
设计人： Norishige Hirakawa , Kazuhiko Sato , Satoru Hagiwara

3. 发明授权

US4684333A Self-priming pump 失效
标题翻译：自吸泵
公开(公告)号：US4684333A
公开(公告)日：1987-08-04
申请号：US881224
申请日：1986-07-02
申请人： Norishige Hirakawa , Kazuo Okada , Kazuhiko Sato
发明人： Norishige Hirakawa , Kazuo Okada , Kazuhiko Sato
IPC分类号： F04D9/02 , F04D13/02 , F04B49/02 , F16K24/00
CPC分类号： F04D13/025 , F04D9/007 , Y10T137/3185
摘要： A communication hole is bored through a partition member which divides an intake-side priming fluid chamber from a discharge-side priming fluid chamber, whereby the two chambers are connected. The communication hole serves to prevent, on a predetermined level, a backflow of a pump fluid due to siphonage caused on the intake side when pumping operation is stopped, thereby securing a priming fluid in a pump casing. A valve assembly including a valve member is disposed corresponding to the communication hole. The valve member, which is always urged to an open position, is moved to and held in a position where it is caused to close the communication hole by the action of the pump fluid flowing in a feeding direction during pumping operation. When the pump is stopped to cause the backflow of the fluid, the valve member is moved back to the open position by the urging action.
摘要翻译：连通孔穿过分隔构件，该分隔构件将进气侧起动流体室与排放侧起动流体室分隔开，由此连接两个室。连通孔用于在泵送操作停止时在预定水平上防止由于吸入侧引起的虹吸引起的泵流体的回流，从而将起动流体固定在泵壳体中。包括阀构件的阀组件相对于连通孔设置。始终被推动到打开位置的阀构件被移动并保持在通过在泵送操作期间沿供给方向流动的泵流体的作用而使连通孔闭合的位置。当泵停止以导致流体的回流时，阀构件通过施力作用而返回到打开位置。

4. 发明授权

US5154587A Magnet pump 失效
标题翻译：磁力泵
公开(公告)号：US5154587A
公开(公告)日：1992-10-13
申请号：US581017
申请日：1990-09-12
申请人： Yozi Mori , Norishige Hirakawa
发明人： Yozi Mori , Norishige Hirakawa
IPC分类号： F04D13/02 , F04D29/04 , F04D29/041 , F04D29/049 , F04D29/58
CPC分类号： F04D29/049 , F04D13/025 , F04D13/026 , F04D29/0413 , F04D29/5893
摘要： A magnet pump is provided with a heat insulating member arranged between a shaft serving as the rotating axis and an impeller or a magnet can, heat conduction cut-off grooves on a heat conducting path, and a safety lock mechanism. These elements ensures to prevent frictional heat, even if generated due to abnormal operating conditions such as a non-load operation, from being conduted to parts with lower heat resistivity such as the impeller and the casing, deflection in rotation caused by looseness due to thermal expansion, and accordingly the magnet pump is protected from damages.

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