Patents by Inventor Bruce H. Sikkema

Bruce H. Sikkema 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).

  • Transducer positioning system for ultrasonic tire testing apparatus
    Patent number: 4274289
    Abstract: An articulated arm having first and second pairs of parallel spaced apart pivotable linkages associated with a tire casing holding fixture for moving an array of ultrasonic transmitting transducers to and from a location exterior to the tire casing and a location between the two sidewalls of the tire casing with the faces of the transducers being a predetermined spaced distance from the interior surface of the tread bearing portion of the casing. Only a single piston/cylinder type actuator linked to the arm is required to achieve the desired movement and positioning of the transducer array.
    Type: Grant
    Filed: August 29, 1979
    Date of Patent: June 23, 1981
    Assignee: AMF Incorporated
    Inventors: Arnold A. Weiss, David C. Christensen, Bruce H. Sikkema