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US 6,616,427 B2Granted
Vacuum-assisted pump
AssigneeRoper Holdings, Inc.
InventorsWilliam B. Carnes, Milton K. Leonard, Robert B. Ray
Life of this patent
Estimating the term…
Abstract
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.
Claims27
A vacuum pump assembly comprising:
- a shaft;
- a connecting rod mounted to the shaft and extending upwardly therefrom to a joint with another member;
- an oil reservoir disposed adjacent the shaft;
- and
- an oil delivery system including elongate members extending outwardly from the shaft, the elongate members being positioned relative to the oil reservoir so as to fling oil upwardly from the oil reservoir to the joint upon rotation of the shaft to improve lubrication.
2 more elements
A vacuum pump assembly, comprising:
- an input shaft operatively coupled with an air moving device, where the air moving device is adapted to pump air to generate a vacuum upon rotation of the input shaft;
- an oil reservoir into which the input shaft at least partially extends;
- and
- an oil delivery system mounted to, and extending outwardly from, the input shaft, where the oil delivery system is positioned relative to the input shaft and oil reservoir so that rotation of the input shaft causes the oil delivery system to repeatedly move through an oil bath contained within the oil reservoir and fling oil out of the oil bath to provide lubrication to components located outside of the oil bath.
1 more element
A self-priming pump, comprising:
- a centrifugal pump section having an inlet and an outlet;
- and
- a vacuum pump assembly configured to prime the centrifugal pump section, the vacuum pump assembly including:
- an intake connected to the inlet of the centrifugal pump section;
- an input shaft operatively coupled with an air moving device, where the air moving device is adapted to pump air to generate a vacuum upon rotation of the input shaft;
- an oil reservoir into which the input shaft at least partially extends;
- and
- an oil delivery system mounted to, and extending outwardly from, the input shaft, where the oil delivery system is positioned relative to the input shaft and oil reservoir so that rotation of the input shaft causes the oil delivery system to repeatedly move through an oil bath contained within the oil reservoir and fling oil out of the oil bath to provide lubrication to components located outside of the oil bath.
5 more elements
Dependencies are inferred from the claim text.