Patents by Inventor Berengere Vignal

Berengere Vignal 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).

  • Mechanical transmission system with a magnetic damper for a rotorcraft
    Patent number: 7914383
    Abstract: The invention relates to a rotorcraft transmission system that comprises both a transmission shaft (21), and electromagnetic induction members (30, 31) of an active magnetic damper that extend around the shaft and that co-operate therewith to determine radial clearance (33). The system further comprises an additional radial damper (35) extending around the shaft with radial spacing (29) that is smaller than the radial clearance, such that in the event of the active magnetic damper failing, radial displacements of the shaft relative to its axis (22) are damped at least in part by the additional radial damper, so that damage to the induction members is limited or avoided.
    Type: Grant
    Filed: November 16, 2007
    Date of Patent: March 29, 2011
    Assignee: Eurocopter
    Inventor: Bérengère Vignal
  • MECHANICAL TRANSMISSION SYSTEM WITH A MAGNETIC DAMPER FOR A ROTORCRAFT
    Publication number: 20080293503
    Abstract: The invention relates to a rotorcraft transmission system that comprises both a transmission shaft (21), and electromagnetic induction members (30, 31) of an active magnetic damper that extend around the shaft and that co-operate therewith to determine radial clearance (33). The system further comprises an additional radial damper (35) extending around the shaft with radial spacing (29) that is smaller than the radial clearance, such that in the event of the active magnetic damper failing, radial displacements of the shaft relative to its axis (22) are damped at least in part by the additional radial damper, so that damage to the induction members is limited or avoided.
    Type: Application
    Filed: November 16, 2007
    Publication date: November 27, 2008
    Applicant: EUROCOPTER
    Inventor: Berengere VIGNAL
  • Aircraft, particularly a helicopter, transmission system
    Patent number: 6680554
    Abstract: Transmission system for an aircraft, particularly a helicopter. The transmission system (1), of supercritical type, comprises at least one rotary transmission tube (4) which is such that at least one natural frequency of said transmission tube (4) is below its nominal rotational speed, and at least one active and controllable magnetic damper (5) capable of generating a magnetic force capable of acting on said transmission tube (4) and which damper is controlled in such a way as to generate a magnetic force making it possible to reduce the vibration of the transmission tube (4), at least when the speed of the transmission tube (4) is within a predetermined range of frequencies defined around said natural frequency.
    Type: Grant
    Filed: November 19, 2001
    Date of Patent: January 20, 2004
    Assignee: Eurocopter
    Inventors: Thomasz Krysinski, Bérengère Vignal
  • Aircraft, particularly a helicopter, transmission system
    Publication number: 20020065139
    Abstract: The transmission system (1), of supercritical type, comprises at least one rotary transmission tube (4) which is such that at least one natural frequency of said transmission tube (4) is below its nominal rotational speed, and at least one active and controllable magnetic damper (5) capable of generating a magnetic force capable of acting on said transmission tube (4) and which damper is controlled in such a way as to generate a magnetic force making it possible to reduce the vibration of the transmission tube (4), at least when the speed of the transmission tube (4) is within a predetermined range of frequencies defined around said natural frequency.
    Type: Application
    Filed: November 19, 2001
    Publication date: May 30, 2002
    Inventors: Thomasz Krysinski, Berengere Vignal