Patents by Inventor Kurt Berroth

Kurt Berroth 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).

  • Apparatus for positive muscle training
    Patent number: 4921244
    Abstract: An apparatus for positive muscle training has a motor-driven auxiliary force device for applying a force to aid the force applied by the trainee to overcome a weight or other counterforce. A control device senses the speed of movement of a cable caused by the force applied by the trainee and actuates the motor of the auxiliary force device when the speed falls below a predetermined value. The control device causes the auxiliary force to increase gently from zero until the predetermined value is reached once more.
    Type: Grant
    Filed: September 30, 1988
    Date of Patent: May 1, 1990
    Inventor: Kurt Berroth