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US 5,700,138 AGranted
Centrifugal pump
AssigneeMcNeil (Ohio) Corporation
InventorJack T. Bevington
Life of this patent
Estimating the term…
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AssigneeMcNeil (Ohio) Corporation
InventorJack T. Bevington
Estimating the term…
A submersible centrifugal pump (10) includes a casing (11) which houses a motor (13) and a pump assembly (14). A shaft (12) which carries the impeller (37) portion of the pump assembly (14) is driven by the motor (13) to draw fluid, in which the pump (10) is immersed, into the casing (11) in one embodiment through inlet ports (38) to be transferred to the pump assembly (14) and thereby pumped to a remote location. The shaft (12) has an axial bore (40) therein which is open at the bottom (41) to receive fluid. That fluid moves upwardly within the shaft (12) and passes out through radial bores (43) to join with the fluid received from the inlet ports (38). As such, internal fluid positioned in a chamber (23) is cooled by the fluid passing through the shaft (12) and that internal fluid in turn maintains the components in the casing (11) cool. In another embodiment, a submersible centrifugal pump (50) has inlet ports (51) formed near the top of its discharge bowl (15). The inlet fluid travels in axial passageways (52) to the inlet side of the pump assembly (14).
Apparatus adapted to be submersed in a fluid and to pump the fluid to a remote location comprising a casing, a discharge bowl at the top of said casing through which the fluid may pass to the remote location, a pump assembly within the casing, said pump assembly having an inlet area on one side thereof and a discharge area on the other side thereof adjacent to said discharge bowl, a motor within said casing, a shaft driven by said motor and carrying a portion of said pump assembly, fluid inlet openings formed through said discharge bowl, and passageways between said inlet openings and said inlet area of said pump assembly so that fluid passes downwardly through said openings and said passageways to said inlet area to be pumped by said pump assembly through said discharge bowl to the remote location.
Apparatus adapted to be submerged in a fluid and to pump the fluid to a remote location comprising an axially extending casing having a top surface, a pump assembly within the casing, said pump assembly having an inlet area on one axial side thereof and a discharge area on the other axial side thereof, a motor within said casing, an axially extending shaft driven by said motor and carrying a portion of said pump assembly, and inlet means to permit the fluid to be transferred to the remote location to axially enter the apparatus through said top surface to be axially discharged from the apparatus by said pump assembly.
Dependencies are inferred from the claim text.