Patents by Inventor Harry E. Ladd

Harry E. Ladd 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).

  • Textile doff servant
    Patent number: 4555067
    Abstract: A power-driven, wheeled vehicle which interacts semiautomatically with winders in a spinning area to doff completed yarn packages, automatically delivers the packages to an unload station to unload the packages from the vehicle and then moves to another winder to repeat the operation. The wheeled vehicle and the winders are located on opposite sides of a service aisle. A frame extendable and retractable across the aisle is mounted to the vehicle. The means for extending and retracting the frame includes two four-bar linkages coupled to the vehicle and the frame and to each other.
    Type: Grant
    Filed: May 24, 1984
    Date of Patent: November 26, 1985
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Richard J. Angelucci, Andrew P. Cope, Donald E. Hallam, Harry E. Ladd