Centrifugal pumps
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United States of America Patent
Stats
-
Dec 31, 1991
Grant Date -
N/A
app pub date -
Jul 18, 1990
filing date -
Jul 18, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A centrifugal pump including a cup-shaped housing closed by a casing cover having inlet and outlet ports and enclosing a pump impeller mounted on a shaft driven by an external driver. The centrifugal pump impeller discharges fluid into a helical passage as it travels from the periphery of the impeller to the discharge port and with the passage being confined to a cylindrical envelope extending axially relative to the impeller and slightly larger than the periphery of the impeller. The helical passage is defined by a part of the pump housing that is separate from the main portion of the housing.
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