Patents Assigned to Alfa-Laval Stalltechnik GmbH
  • Device for revolving liquids and supplying gas thereto
    Patent number: 4200597
    Abstract: A driven hollow shaft carries propeller means in the form of a screw-shaped vane which at its lower edge widens to a chamber communicating through a channel with the interior of the hollow shaft and having an outlet opening through which gas supplied through the hollow shaft is discharged into a liquid in which the propeller means are immersed. The chamber is formed by two downwardly diverging screw-shaped surfaces of the vane and has a V-shaped cross section with the apex pointing outwardly from the driven shaft.
    Type: Grant
    Filed: August 18, 1978
    Date of Patent: April 29, 1980
    Assignee: Alfa-Laval Stalltechnik GmbH
    Inventor: Engelbert Baum