Patents by Inventor Paul F. Proffitt

Paul F. Proffitt 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).

  • Abradable shroud assembly for turbomachinery
    Patent number: 5683789
    Abstract: A bonded assembly which includes a heating element in thermal contact with the adhesive component of the bonded assembly, such that the heating element can serve to thermally degrade the adhesive so as to allow disassembly, repair and servicing of the bonded assembly. The invention is particular suited for use in an abradable shroud assembly used in the fan section of a turbomachine, such as a high bypass turbofan engine. The abradable shroud assembly includes an abradable material bonded to the fan casing with an adhesive material having a known thermal degradation temperature. Placed in thermal contact with the adhesive layer is a heating element, such that the heating element is capable of heating the adhesive to a temperature above its thermal degradation temperature.
    Type: Grant
    Filed: September 23, 1996
    Date of Patent: November 4, 1997
    Assignee: General Electric Company
    Inventors: Leslie L. Langenbrunner, Paul F. Proffitt
  • Method of removing an abradable shroud assembly for turbomachinery
    Patent number: 5662757
    Abstract: A bonded assembly which includes a heating element in thermal contact with the adhesive component of the bonded assembly, such that the heating element can serve to thermally degrade the adhesive so as to allow disassembly, repair and servicing of the bonded assembly. The invention is particular suited for use in an abradable shroud assembly used in the fan section of a turbomachine, such as a high bypass turbofan engine. The abradable shroud assembly includes an abradable material bonded to the fan casing with an adhesive material having a known thermal degradation temperature. Placed in thermal contact with the adhesive layer is a heating element, such that the heating element is capable of heating the adhesive to a temperature above its thermal degradation temperature.
    Type: Grant
    Filed: May 20, 1996
    Date of Patent: September 2, 1997
    Assignee: General Electric Company
    Inventors: Leslie L. Langenbrunner, Paul F. Proffitt
  • Intumescent fire retardant material
    Patent number: 4065394
    Abstract: A silicone resin base fire retardant system having a temperature capability at least to about 450.degree. F (230.degree. C) combines intumescent characteristics with a crusting and charring capability through use of a combination of an oxide of iron and a phosphate of potassium for crusting, along with a charring material such as tripentaerythritol and a blowing agent, such as melamine, in a silicone resin base to allow for adequate expansion.
    Type: Grant
    Filed: May 17, 1976
    Date of Patent: December 27, 1977
    Assignee: General Electric Company
    Inventors: Richard D. Pratt, Paul F. Proffitt, George Webb
  • Intumescent fire retardant material and article
    Patent number: 4052526
    Abstract: A silicone resin base fire retardant system having a temperature capability at least to about 450.degree. F (230.degree. C) combines intumescent characteristics with a crusting and charring capability through use of a combination of an oxide of iron and a phosphate of potassium for crusting, along with a charring material such as tripentaerythritol and a blowing agent, such as melamine, in a silicone resin base to allow for adequate expansion.
    Type: Grant
    Filed: May 17, 1976
    Date of Patent: October 4, 1977
    Assignee: General Electric Company
    Inventors: Richard D. Pratt, Paul F. Proffitt, George Webb
  • Intumescent fire retardant material and article
    Patent number: 3983082
    Abstract: A silicone resin base fire retardant system having a temperature capability at least to about 450.degree.F (230.degree.C) combines intumescent characteristics with a crusting and charring capability through use of a combination of an oxide of iron and a phosphate of potassium for crusting, along with a charring material such as tripentaerythritol and a blowing agent, such as melamine, in a silicone resin base to allow for adequate expansion.
    Type: Grant
    Filed: February 19, 1975
    Date of Patent: September 28, 1976
    Assignee: General Electric Company
    Inventors: Richard D. Pratt, Paul F. Proffitt, George Webb