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公开(公告)号：USRE39813E1
公开(公告)日：2007-09-04
申请号：US10962257
申请日：2004-10-08
IPC分类号： F04D9/04
CPC分类号： F04D9/043 , F04D9/046 , Y10T137/3099
摘要： A self-priming centrifugal pump including a supplementary vacuum pump and a float valve. The vacuum pump serves to draw liquid to the pump for priming and the float valve shut of flow to the vacuum pump when liquid reaches a predetermined level to prevent entry of liquid into the vacuum pump. In some embodiments the float valve includes an o-ring valve seal and the vacuum pump includes an oil delivery system to distribute oil from an oil reservoir to improve lubrication.
摘要翻译： 一种自吸离心泵，包括辅助真空泵和浮阀。 当液体达到预定水平以防止液体进入真空泵时，真空泵用于将液体引导到泵上用于起动和浮阀关闭到真空泵的流动。 在一些实施例中，浮阀包括O形圈阀密封件，并且真空泵包括用于从油箱分配油以改善润滑的输油系统。
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公开(公告)号：US06616427B2
公开(公告)日：2003-09-09
申请号：US10147144
申请日：2002-05-15
IPC分类号： F04B4504
CPC分类号： F04D9/043 , F04D9/046 , Y10T137/3099
摘要： A self-priming centrifugal pump including a supplementary vacuum pump and a float valve. The vacuum pump serves to draw liquid to the pump for priming and the float valve shut of flow to the vacuum pump when liquid reaches a predetermined level to prevent entry of liquid into the vacuum pump. In some embodiments the float valve includes an o-ring valve seal and the vacuum pump includes an oil delivery system to distribute oil from an oil reservoir to improve lubrication.
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公开(公告)号：US06575706B2
公开(公告)日：2003-06-10
申请号：US10131419
申请日：2002-04-22
IPC分类号： F04D904
CPC分类号： F04D9/043 , F04D9/046 , Y10T137/3099
摘要： A self-priming centrifugal pump including a supplementary vacuum pump and a float valve. The vacuum pump serves to draw liquid to the pump for priming and the float valve shut of flow to the vacuum pump when liquid reaches a predetermined level to prevent entry of liquid into the vacuum pump. In some embodiments the float valve includes an o-ring valve seal and the vacuum pump includes an oil delivery system to distribute oil from an oil reservoir to improve lubrication.
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公开(公告)号：US06409478B1
公开(公告)日：2002-06-25
申请号：US09258833
申请日：1999-02-26
IPC分类号： F04D904
CPC分类号： F04D9/043 , F04D9/046 , Y10T137/3099
摘要： A self-priming centrifugal pump including a supplementary vacuum pump and a float valve. The vacuum pump serves to draw liquid to the pump for priming and the float valve shut of flow to the vacuum pump when liquid reaches a predetermined level to prevent entry of liquid into the vacuum pump. In some embodiments the float valve includes an o-ring valve seal and the vacuum pump includes an oil delivery system to distribute oil from an oil reservoir to improve lubrication.
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