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US 6,149,384 AGranted
Centrifugal pump
OwnerVaclav Feresinventor
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OwnerVaclav Feresinventor
Estimating the term…
A centrifugal pump has a casing, an overhung-mounted rotor in the casing having a feed chamber, which centrifugally accelerates the liquid flowing centrally to it, and a discharge chamber positioned axially behind it and connected to the feed chamber in the vicinity of the inner circumference of the rotor, as well as a scoop pipe guided centrally into the discharge chamber close to the inner circumference thereof and by means of which the liquid is discharged. For the discharge of liquids from a vacuum chamber, the discharge chamber is connected by means of a line centrally introduced into it to the gas phase of the vacuum chamber, so that the liquid flowing in via the feed chamber forms on its inner circumference a liquid ring, into which is immersed the feed end of the scoop pipe, and that on the drain side the scoop pipe is closed by an automatically closing valve, which opens under the operating pressure.
A centrifugal pump comprising a casing, an overhung-mounted rotor rotating about an axis in the casing, a feed chamber centrifugally accelerating a liquid flowing centrally into the feed chamber, a discharge chamber positioned axially behind and connected to the feed chamber in an area of an inner circumference of the rotor, a scoop pipe centrally guided in the discharge chamber having a drain side and a feed end which is immersed in the liquid close to an inner circumference of the discharge chamber so that the liquid is discharged, a vacuum chamber, an open line coupling the vacuum chamber to the discharge chamber and an automatically closing check valve closing the scoop pipe on a drain side under an operating pressure.
Dependencies are inferred from the claim text.