Vacuum-assisted pump

Details Vacuum-assisted pump Vacuum-assisted pump

2007-09-04

2007-09-04

Koczo, Jr., Michael (Department: 3746)

Pumps

Diverse pumps

Priming with liquid level responsive control

Reissue Patent

active

10962257

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.

REFERENCES:
patent: 1201594 (1916-10-01), King
patent: 1475994 (1923-12-01), Havens
patent: 1840257 (1932-01-01), Saxe et al.
patent: 1910775 (1933-05-01), Saxe
patent: 2192442 (1940-03-01), Hoffman
patent: 2845875 (1958-08-01), Corbett
patent: 4249865 (1981-02-01), Sloan

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