Patents by Inventor Sharon Parr Nelson

Sharon Parr Nelson 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).

  • Self-locking mule shoe
    Patent number: 4094360
    Abstract: A mule shoe having a closed key-receiving slot defined by long and short edges therein is characterized by a cam surface thereon connecting the ends of the edges of the slot. The sum of the angular distance occupied by the slot and the angular distance through which the cam surface winds about the axis of the member is equal to at least 360.degree.. An axially directed reaction force generated by abutting contact between the cam surface and a key is converted to a torque acting to cam the mule shoe in only a predetermined angular direction.
    Type: Grant
    Filed: July 1, 1977
    Date of Patent: June 13, 1978
    Assignee: Wilson Industries, Inc.
    Inventor: Sharon Parr Nelson