Patents by Inventor Terry A. Crissinger

Terry A. Crissinger 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).

  • Drive system having a strengthened drive system member for resisting torsional stresses
    Patent number: 6158310
    Abstract: A novel drive system includes a body, such as a threaded fastener body or a drive tool body, a tapered transitional portion at an end of the body, and a drive head at the end of the transitional portion, such that the transitional portion is between the drive head and the body. The transitional portion has structure thereon, such as a plurality of alternating curved lobes and flutes, for engagement with a corresponding socket. At least a portion of the lobes are threaded in the transitional portion. The drive head also has structure thereon for engagement with the socket, such as a plurality of alternating curved lobes and flutes. The flutes on the transitional portion are axially aligned with the flutes on the drive head and the lobes on the transitional portion are axially aligned with the lobes on the drive head.
    Type: Grant
    Filed: May 24, 1999
    Date of Patent: December 12, 2000
    Assignee: Textron Inc.
    Inventors: David C. Goss, Terry A. Crissinger