Patents by Inventor Ron D. Hirth

Ron D. Hirth 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).

  • Patent number: 6933638
    Abstract: An electric motor having a reverse air flow cooling system that eliminates the need to extend lead wires past the fan. The electric motor includes a fan positioned on the lead-end of the motor to move air through a housing of the electric motor in a direction generally defined from the shaft-end of the motor to the lead-end of the motor. Lead wires can extend from the stator windings radially through the housing for connection to an electric start switch. The electric start switch can be positioned in a control box that is coupled to the housing. The electric start switch can be operable to remove an auxiliary circuit from a stator circuit after startup of the electric motor.
    Type: Grant
    Filed: April 6, 2004
    Date of Patent: August 23, 2005
    Assignee: A. O. Smith Corporation
    Inventor: Ron D. Hirth