Patents by Inventor Eric R. Ericsson

Eric R. Ericsson 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).

  • Drive device without transmission for producing an elliptical shaking movement
    Patent number: 4212731
    Abstract: A drive device for oscillating a spring-suspended device, such as a sieve or transport device, into an elliptical translational movement with a minimum of rotation. Two unequal and eccentrically arranged oscillation masses, rotatably fixed to the device, are rotationally driven each by a motor independent of the other. If the axes of rotation for the two masses are arranged in a certain geometry relative to the center of mass, the device will oscillate with a substantially pure translational, elliptical movement free of tipping movement.
    Type: Grant
    Filed: July 7, 1978
    Date of Patent: July 15, 1980
    Assignee: Morgardshammar Aktiebolag
    Inventors: Hans-Henrik B. Wallin, Eric R. Ericsson