Patents by Inventor Paul H. Zajchowski

Paul H. Zajchowski 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).

  • Tooling assembly for positioning airfoils of a rotary machine
    Patent number: 5998755
    Abstract: A tooling assembly 10 for use with apparatuses 12,54 for propelling a stream of particles at the tip 46 of a rotor blade, a stator vane is disclosed. Various construction details are developed which enable the use of the assembly with either apparatus. In one embodiment, the wall 36 of a rotatable fixture 32 shields part of the rotor blade or stator vane.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: December 7, 1999
    Assignee: United Technologies Corporation
    Inventors: Paul H. Zajchowski, Alfonso Diaz
  • Method for applying a coating to the tip of a flow directing assembly
    Patent number: 5916638
    Abstract: A method for applying a coating to the tips 46 of an array of flow directing assemblies 42 such as an array of rotor blades or stator vanes is disclosed. various steps in the method are developed which decrease cost and increase the efficiency of the method. In one particular embodiment, the step of surface preparation and coating applications are performed with the same fixture without removing or reinstalling the assemblies.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: June 29, 1999
    Assignee: United Technologies Corporation
    Inventors: Paul H. Zajchowski, Alfonso Diaz
  • Thermal spray coating process for rotor blade tips using a rotatable holding fixture
    Patent number: 5879753
    Abstract: A process for controllably applying thermal spray coating onto substrates is described. The process includes positioning rotor blades in a fixture rotatable about an axis, forming a spray of particles of softened coating medium in an apparatus for propelling the coating medium towards the blade tips and coating the blade tips by passing the blades through the spray of particles of coating medium. Various process details, including process parameters, are developed.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: March 9, 1999
    Assignee: United Technologies Corporation
    Inventors: Paul H. Zajchowski, Alfonso Diaz, Melvin Freling, John F. Lally