Patents Assigned to Brodr. Brunvoll Motorfabrikk A/S
  • Elastically supported thruster structure
    Patent number: 4884985
    Abstract: A propeller thruster installation includes a propeller unit rigidly supported in an inner tunnel tube which in its turn is elastically coaxially supported in an outer tunnel tube which is rigidly secured to the hull of a ship. In order to reduce the transmission of noise and vibrations from the propeller unit to the interior of the ship an annulus between the outer and inner tunnel tubes is filled with, a continuously maintained "bubble curtain" of air.
    Type: Grant
    Filed: November 25, 1985
    Date of Patent: December 5, 1989
    Assignee: Brodr. Brunvoll Motorfabrikk A/S
    Inventor: Arnfinn Dyrkorn
  • Elastically supported thruster structure
    Patent number: 4629432
    Abstract: A propeller thruster installation includes a propeller unit rigidly supported in an inner tunnel tube which in its turn is elastically coaxially supported in an outer tunnel tube which is rigidly secured to the hull of a ship. In order to reduce the transmission of noise and vibrations from the propeller unit to the interior of, an ship the annulus between the outer and inner tunnel tubes is filled with elastic gas cushions, or a continuously maintained "bubble curtain" of air.
    Type: Grant
    Filed: August 28, 1984
    Date of Patent: December 16, 1986
    Assignee: Brodr. Brunvoll Motorfabrikk A/S
    Inventors: Arnfinn Dyrkorn, Leiv R. Standal