Patents by Inventor Stephen J. Lotz

Stephen J. Lotz 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).

  • Method for forming a thin-walled combustion liner for use in a gas turbine engine
    Patent number: 5413647
    Abstract: A vacuum centrifugally cast combustion liner suitable for use in a gas turbine engine operating at temperatures ranging from ambient up to about 1700.degree. F. is provided. The combustion liner is formed by centrifugally vacuum casting a precipitation hardened nickel-based superalloy having controlled, low amounts of aluminum and titanium. The combustion liner is characterized by a homogeneous grain structure having enhanced strength and creep resistance particularly at elevated temperatures. In addition, the preferred elemental composition, particularly the relatively small amounts of aluminum and titanium, enhance the weldability and overall manufacturability of the combustion liner.
    Type: Grant
    Filed: March 10, 1994
    Date of Patent: May 9, 1995
    Assignee: General Electric Company
    Inventors: Adrian M. Ablett, Robert Dzugan, Stephen J. Lotz