Patents by Inventor David O. Bess

David O. Bess 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).

  • Method of manufacturing a helical structure
    Patent number: 5498387
    Abstract: A helical structure having a shaft defining an axis of rotation and a substantially helical flight extending about the axis of rotation and composed of a plurality of sections each having a segment disposed in substantially right angular relation to the axis of rotation. A method for manufacturing a helical structure or the like including the steps of producing a mold having a mold cavity defining a configuration for the helical structure having a substantially helical flight composed of a plurality of sections having segments disposed in substantially right angular relation to an axis of rotation for the helical structure, introducing a moldable substance into the mold cavity to form the helical structure in the configuration and removing the helical structure from the mold cavity by separating the mold along a path substantially aligned with the segments.
    Type: Grant
    Filed: June 29, 1993
    Date of Patent: March 12, 1996
    Assignees: The Vendo Company, Wrex Products, Inc., a part interest
    Inventors: Daniel S. Carter, Dennis M. Rupp, David O. Bess