Patents by Inventor Holger Appel

Holger Appel 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 and device for cleaning a jet engine
    Patent number: 10247033
    Abstract: A nozzle installation includes at least one nozzle configured for introducing cleaning media containing solids into a jet engine, and for a rotationally fixed connection to a shaft of a turbofan of a jet engine. The at least one nozzle has a swivel coupling to which a line connection is connectable. A flexible hose forms a connection of a nozzle-side outlet of the swivel coupling to an inlet of the at least one nozzle.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: April 2, 2019
    Assignee: LUFTHANSA TECHNIK AG
    Inventors: Holger Appel, Klaus Braeutigam
  • Method and device for cleaning a jet engine
    Patent number: 9903223
    Abstract: A method for cleaning a jet engine includes introducing into the engine, via a carrier gas by way of at least one nozzle, a cleaning medium which contains solids. The pressure of the carrier gas is 1 to 5 bar. An exit of the at least one nozzle is disposed at a radial spacing from a rotation axis of the engine which corresponds to 0.6 to 1.2 times the radius of the entry opening of a first compressor stage that is directed upstream. A main exit direction of the nozzle in relation to the rotation axis of the engine encloses an angle of 10 to 30°.
    Type: Grant
    Filed: November 28, 2014
    Date of Patent: February 27, 2018
    Assignee: LUFTHANSA TECHNIK AG
    Inventors: Holger Appel, Klaus Braeutigam
  • METHOD AND DEVICE FOR CLEANING A JET ENGINE
    Publication number: 20170114663
    Abstract: A nozzle installation includes at least one nozzle configured for introducing cleaning media containing solids into a jet engine, and for a rotationally fixed connection to a shaft of a turbofan of a jet engine. The at least one nozzle has a swivel coupling to which a line connection is connectable. A flexible hose forms a connection of a nozzle-side outlet of the swivel coupling to an inlet of the at least one nozzle.
    Type: Application
    Filed: January 6, 2017
    Publication date: April 27, 2017
    Inventors: Holger Appel, Klaus Braeutigam
  • METHOD AND DEVICE FOR CLEANING A JET ENGINE
    Publication number: 20160298488
    Abstract: A method for cleaning a jet engine includes introducing into the engine, via a carrier gas by way of at least one nozzle, a cleaning medium which contains solids. The pressure of the carrier gas is 1 to 5 bar. An exit of the at least one nozzle is disposed at a radial spacing from a rotation axis of the engine which corresponds to 0.6 to 1.2 times the radius of the entry opening of a first compressor stage that is directed upstream. A main exit direction of the nozzle in relation to the rotation axis of the engine encloses an angle of 10 to 30°.
    Type: Application
    Filed: November 28, 2014
    Publication date: October 13, 2016
    Inventors: Holger Appel, Klaus Braeutigam