Patents by Inventor James E. Rigdon

James E. Rigdon 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: 6066833
    Abstract: An apparatus for selecting a consumable welding wire from a plurality of consumable welding wires. The apparatus has a base, and a drive wheel rotatably supported by the base for engaging a consumable welding wire. A plurality of pinch-roller arms is pivotally secured to the base, and a plurality of pinch rollers is rotatably secured to the plurality of pinch-roller arms. The apparatus also includes a plurality of spring assemblies supported by the base for biasing the plurality of pinch-roller arms. A plurality of pneumatic cylinder assemblies engage the base and the pinch-roller arms for moving the pinch-roller arms relative to the base. A method for selecting any one of a plurality of consumable welding wires comprising pivoting a pinch-roller assembly to cause a rotatable pinch roller to engage and hold a consumable welding wire in driving engagement with a rotatable drive wheel.
    Type: Grant
    Filed: July 29, 1998
    Date of Patent: May 23, 2000
    Assignee: Howard Industries
    Inventors: James E. Rigdon, Norman V. Hill