公开(公告)号：US3416176A

公开(公告)日：1968-12-17

申请号：US65941967

申请日：1967-08-09

Applicant: RICHARDS OF ROCKFORD INC

Inventor： RAVITTS RICHARD B

IPC: B08B9/093

CPC classification number: B08B9/0933

公开(公告)号：US3416729A

公开(公告)日：1968-12-17

申请号：US57201866

申请日：1966-08-12

Applicant: RICHARDS OF ROCKFORD INC

Inventor： RAVITTS RICHARD B ,  MECKENSTOCK JOHN W

IPC: B01F3/04 ,  B01F7/00 ,  B01F7/16 ,  B01F13/00 ,  B05B3/08 ,  B05B17/08 ,  C02F3/16 ,  F04D13/06

CPC classification number: F04D13/066 ,  B01F3/04773 ,  B01F7/16 ,  B01F13/0049 ,  B05B3/082 ,  B05B17/08 ,  C02F3/16 ,  C02F3/165 ,  Y02W10/15 ,  Y10S261/71

公开(公告)号：US3572658A

公开(公告)日：1971-03-30

申请号：US3572658D

申请日：1968-01-15

Applicant: RICHARDS OF ROCKFORD INC

Inventor： RAVITTS RICHARD B

IPC: B01F3/04 ,  B01F7/00 ,  B01F7/16 ,  B01F13/00 ,  C02F3/16 ,  B01F5/12 ,  C02C5/00

CPC classification number: B01F3/04773 ,  B01F7/16 ,  B01F13/0049 ,  C02F3/16 ,  Y02W10/15 ,  Y10S261/71

Abstract: A floating liquid aerator includes an axial flow propeller rotated by an electric motor and disposed within a tubular throat to pump water from a pond upwardly through the throat and against a rotatable diffuser which slings the water outwardly for interface contact with the surrounding atmosphere. Telescoped into the throat and over the propeller is a tubular ring duct which divides the upwardly flowing column of water into a central core and a surrounding outer cylinder to prevent the formation of a vortex within the throat and thereby increase the pumping efficiency of the aerator. More nearly laminar flow across the propeller is produced by a series of stationary infuser vanes positioned beneath the ring duct to feed the inflowing water inwardly to the propeller at a controlled angle. Increased transfer of oxygen to the water is achieved by introducing air into the upwardly flowing water, the air being admitted into the outer cylinder of water in the area of the ring duct to avoid cavitation at the propeller.