Patents by Inventor Harvey Simpson

Harvey Simpson 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 snap hook
    Patent number: 5896630
    Abstract: A self locking snap hook that includes a central shank having an arch shaped hook member that defines a gateway opening at one end, a gate keeper enclosing the gateway opening, a locking lever to prevent the opening of the gate keeper, and a second locking mechanism having an engaged and a disengaged position such that when it is engaged it prevents the locking lever from being disengaged. Movement of the second locking mechanism between its engaged and disengaged positions requires the application of force and resulting movement in a direction other than that required to move the locking lever from its engaged to its disengaged position.
    Type: Grant
    Filed: February 3, 1998
    Date of Patent: April 27, 1999
    Assignee: Haun Drop Forge Co., Ltd.
    Inventors: Keith A. Smith, Steve B. Levay, Harvey Simpson