Patents by Inventor Willard Rask

Willard Rask 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).

  • Slotted cylinder transducer with trapezoidal cross-sectional electrodes
    Patent number: 6678213
    Abstract: A slotted cylinder transducer assembly, which has an outer cylindrical shell having a gap. A cylindrical actuator is disposed adjacent and inside the shell and has a gap which corresponds in position to the gap in the shell. The cylindrical actuator has a number of ceramic elements and electrodes alternately disposed circumferentially in the cylindrical actuator. Each of the ceramic elements are shaped in the form of a rectangular prism and have a rectangular cross-section. Each of the electrodes are shaped in the form of a trapezoidal prism and have a trapezoidal cross-section. The rectangular cross-section of the ceramic elements interposed together with the trapezoidal cross-section of the electrodes provides for the cylindrical shape of the actuator. The slotted cylinder transducer assembly may optionally include a seal boot, made preferably from a non-corrosive material for protecting from water or other material ingress.
    Type: Grant
    Filed: April 18, 2002
    Date of Patent: January 13, 2004
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Willard Rask, Jerome DeJaco