Patents by Inventor Denis R. G. Laffitte

Denis R. G. Laffitte 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).

  • Process for detection of rotating stall
    Patent number: 4430855
    Abstract: A process and a device for detecting a rotating stall in a turbojet engine having two rotating spools including a high pressure spool and a low pressure spool, wherein the rotation speed (N.sub.HP, N.sub.BP) of each of said spools is measured, and the derivative relative to time dN.sub.HP /dt of the rotation speed (N.sub.HP) of the high pressure spool is derived. A command signal is generated as soon as the following conditions are met: ##EQU1## where A, B and C are constant values.
    Type: Grant
    Filed: August 13, 1981
    Date of Patent: February 14, 1984
    Assignee: SNECMA
    Inventors: Pierre E. Deneux, Patrick J. Faure, Denis R. G. Laffitte, Michel E. M. Lemaoult
  • Turbine distributor vane
    Patent number: 4403917
    Abstract: A turbine nozzle vane of the kind which includes at least one inner hollow portion inside which a corrugated sleeve positioned against the sides thereof against protruding components. The protruding components against which the sleeve stands are arranged along the inner side and the outer surface according to a zone that stretches throughout most of the height and the width of which, being optimal at the base, changes gradually along the entire height before becoming minimal at the upper portion.
    Type: Grant
    Filed: January 5, 1981
    Date of Patent: September 13, 1983
    Assignee: Societe Nationale d'Etude et de Construction de Moteurs d'Aviation "S.N.E.C.M.A."
    Inventors: Denis R. G. Laffitte, Guy H. Louis, Alain M. M. Raybaud