Patents by Inventor Frederick C. Walden

Frederick C. Walden 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).

  • Abrasive/abradable gas path seal system
    Patent number: 5932356
    Abstract: A composite ceramic coating having abrasive properties for application to a metallic substrate is provided which includes a ceramic matrix and a plurality of ceramic abrasive particles disposed within said ceramic matrix. The abrasive particles have a shear strength substantially greater than that of the ceramic matrix and possess an angular geometry. A method for providing an abrasive coating on a metallic article is also provided.
    Type: Grant
    Filed: March 21, 1996
    Date of Patent: August 3, 1999
    Assignee: United Technologies Corporation
    Inventors: Gerard A. Sileo, William J. Woodard, Frederick C. Walden, Harold W. Pettit, Jr., Timothy A. Twigg
  • Method for providing an abrasive coating on a metallic article
    Patent number: 5897920
    Abstract: A composite ceramic coating having abrasive properties for application to a metallic substrate is provided which includes a ceramic matrix and a plurality of ceramic abrasive particles disposed within said ceramic matrix. The abrasive particles have a shear strength substantially greater than that of the ceramic matrix and possess an angular geometry. A method for providing an abrasive coating on a metallic article is also provided.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: April 27, 1999
    Assignee: United Technologies Corporation
    Inventors: Gerard A. Sileo, William J. Woodard, Frederick C. Walden, Harold W. Pettit, Jr., Timothy A. Twigg
  • Multiple port plasma spray apparatus and method for providing sprayed abradable coatings
    Patent number: 4696855
    Abstract: An apparatus and method are described for simultaneously thermal spraying at least two types of powders onto a substrate, wherein both powder types are carried by a single spray stream and impacted upon the substrate. According to the invention, the different powder types are injected into the spray stream through separate powder ports in such a manner that there is substantially no mixing of the powder types in the spray stream. The spray system and substrate being sprayed are moved relative to each other to produce a homogeneous sprayed powder deposit.
    Type: Grant
    Filed: April 28, 1986
    Date of Patent: September 29, 1987
    Assignee: United Technologies Corporation
    Inventors: Harold W. Pettit, Jr, Charles G. Davis, Frederick C. Walden