Patents by Inventor David F Bettridge

David F Bettridge 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).

  • Titanium article having a protective coating and a method of applying a protective coating to a titanium article
    Patent number: 6447924
    Abstract: A gamma titanium aluminide turbine blade (10) has a titanium oxide layer (20) on its outer surface. A protective coating (22) is applied to the aerofoil (12) and the platform (14) of the turbine blade (10) onto the titanium oxide layer (20). The protective coating (22) comprises a silicate glass having a chromium oxide filler. The protective coating (22) preferably comprise a boron titanate silicate glass having a chromium oxide filler. The oxide layer (20) adheres the protective coating (22) to the titanium aluminide turbine blade (10). The protective coating (22) provides oxidation and sulphidation resistance.
    Type: Grant
    Filed: September 24, 1999
    Date of Patent: September 10, 2002
    Assignee: Rolls-Royce plc
    Inventor: David F Bettridge
  • Coating composition having good corrosion and oxidation resistance
    Patent number: 5455119
    Abstract: A coating composition comprising an alloy having the formula RCrAlR'R" wherein R is nickel, cobalt or the like; R' is yttrium or hafnium and R" is tantalum, rhenium and/or platinum, preferably mixed with an oxide dispersion such as alumina, to provide an improved class of coatings suitable for operating in high temperature oxidizing environments.
    Type: Grant
    Filed: November 8, 1993
    Date of Patent: October 3, 1995
    Assignees: Praxair S.T. Technology, Inc., Rolls-Royce PLC
    Inventors: Thomas A. Taylor, David F. Bettridge, Robert C. Tucker, Jr.
  • Method of providing titanium and alloys thereof with a protective coating
    Patent number: 4988575
    Abstract: A method of providing a surface of titanium or an alloy thereof with a protective coating in which the surface is cleaned and then heated in clean air at a temperature within the range 500.degree.-550.degree. C. for a period of at least four hours.
    Type: Grant
    Filed: September 15, 1989
    Date of Patent: January 29, 1991
    Assignee: Rolls-Royce plc
    Inventors: David F. Bettridge, Terence P. Cunningham, Brian W. Forman