Patents by Inventor Alain Bertschy

Alain Bertschy has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Centrifugal pump especially for aquariums
    Patent number: 4985181
    Abstract: A submersible centrifugal pump especially for aquariums includes a motor driven impeller for circulating water through the pump and a movable flow indicator visible from the exterior of the pump for visually indicating the water flow rate through the pump. The impeller is mounted on a hollow motor shaft which protrudes above the pump to provide for the passage of air down through the shaft for mixing with the water within the pump. The shaft is rotatable relative to the impeller to permit turning of a valve shutter connected thereto relative to a valve seat for controlling the water flow rate through the pump.
    Type: Grant
    Filed: October 23, 1989
    Date of Patent: January 15, 1991
    Assignee: Newa S.r.l.
    Inventors: Antonio Strada, Alain Bertschy, Giacomo Guoli, Edmund J. Mowka, Jr.