Patents by Inventor William W Riopka

William W Riopka 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).

  • Switch with improved protection from ice conditions
    Patent number: 7223928
    Abstract: An arrangement is provided to protect an electrical switch from the deleterious effects of ice formation that inhibits switch operation. In a preferred arrangement, an ice shield is provided that protects the current-carrying contact structures and other operative elements of the switch from ice buildups. In one specific arrangement, as the switch is moved from the open position to the closed position, the ice shield moves away from the contact structure of a moving contact of the switch to permit unfettered engagement with a stationary contact structure of the switch.
    Type: Grant
    Filed: December 12, 2005
    Date of Patent: May 29, 2007
    Assignees: S&C Electric Canada Ltd., S&C Electric Company
    Inventors: William W Riopka, Terrence S. Kerr