C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 3/02 (2006.01) B01F 3/04 (2006.01) B01F 7/00 (2006.01)
Patent
CA 2102731
LIQUID AERATING APPARATUS ABSTRACT OF THE DISCLOSURE Apparatus for aerating a pool of liquid has a hollow, rotatable drive shaft journaled for rotation about an axis and coupled at one end to a driving motor. A propeller is mounted at the other end of the drive shaft. The propeller has a plurality of hollow blades in communication with an internal aerating fluid passage in the drive shaft. A plurality of air inlets is provided in the drive shaft and at least one outlet port is provided in each blade at the zone of highest negative pressure resulting from rotation of the blade in the liquid. The drive shaft automatically is movable from a dry- docked position in which the shaft is out of the liquid to an operating position in which the propeller blades are immersed in the liquid. A seal is provided between the propeller and the shaft journal to protect the latter against exposure to the liquid. The shaft is continuously pressurized between the journal and the seal to prevent liquid from passing through the seal should the seal become worn.
Finlayson & Singlehurst
von Berg Richard
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