Patents by Inventor Robert M. Lyothier

Robert M. Lyothier 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).

  • Blade end for rotary wing of an aircraft and rotary wing provided with such blade ends
    Patent number: 4451206
    Abstract: The invention relates to a blade end for rotary wing of an aircraft, whose span is between 5 and 15% of the span of said blade. According to the invention, this blade end is charaterized in that, between points A and B', there is a stagger which, measured parallel to the span of the blade, is between 5 and 25% of the chord of the profile of the blade adjacent said blade end and in that the leading edge line of said blade end is curvilinear and such that its angle of sweep .phi. varies progressively and continuously from a low value .phi..sub.o near the blade, of between 0.degree. and 30.degree., up to a high value .phi..sub.E towards the outside of the blade, of between 60.degree. and 90.degree.. The invention leads to increased performances and to a reduction in the noise level of rotary wings.
    Type: Grant
    Filed: May 26, 1982
    Date of Patent: May 29, 1984
    Assignees: Office Nationale d'Etudes et de Recherches Aerospatiales, Societe Nationale Industrielle Aerospatiale
    Inventors: Jean-Jacques Philippe, Robert M. Lyothier