Patents by Inventor Lennard D. Lutes

Lennard D. Lutes 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).

  • Impeller for dispersing gas into molten metal
    Patent number: 8178036
    Abstract: An impeller for dispersing gas into molten metal includes a rectangular prism body having upper and lower faces and four side walls. The body has an opening extending through the upper and lower faces and defines a hub around the opening on the upper face. The impeller further includes a plurality of elongate grooves extending radially outwardly from the hub.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: May 15, 2012
    Assignee: Pyrotek, Inc.
    Inventors: David Neff, Richard S. Henderson, Lennard D. Lutes, James Grayson
  • IMPELLER FOR DISPERSING GAS INTO MOLTEN METAL
    Publication number: 20100052227
    Abstract: An impeller for dispersing gas into molten metal includes a rectangular prism body having upper and lower faces and four side walls. The body has an opening extending through the upper and lower faces and defines a hub around the opening on the upper face. The impeller further includes a plurality of elongate grooves extending radially outwardly from the hub.
    Type: Application
    Filed: July 13, 2007
    Publication date: March 4, 2010
    Inventors: David Neff, Richard S. Henderson, Lennard D. Lutes, James Grayson
  • Modular filter for molten metal
    Patent number: 6231639
    Abstract: A filter cartridge for a molten metal filtering system is provided with a modular construction in which the filter elements are adapted to be removably mounted to an end plate. The filter elements may be removed separately from the filter and replaced with new filter elements without removing the entire cartridge assembly. According to another aspect of the invention, the filter elements are provided with an elliptical cross-section.
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: May 15, 2001
    Assignee: Metaullics Systems Co., L.P.
    Inventors: David J. Eichenmiller, Richard S. Henderson, Lennard D. Lutes, Harvey Martin