Patents Assigned to Bell Helicopter
  • Vibration isolation system
    Patent number: 5788029
    Abstract: A vibration isolation system comprises four tunable dual-axis hydraulic inertial isolators, an array of accelerometers, and a controller. The controller inputs signals from the accelerometers and outputs signals to tune the isolators to minimize the vibration transmitted from a vibrating body to an isolated body. The isolators are tuned by varying the dimensions of their tuning passages or by application of magnetohydrodynamic force to the liquid within the tuning passages.
    Type: Grant
    Filed: November 20, 1996
    Date of Patent: August 4, 1998
    Assignee: Bell Helicopter
    Inventors: Michael Reaugh Smith, Frank Bradley Stamps
  • Vibration isolation system
    Patent number: 5704596
    Abstract: A vibration isolation system comprises four tunable dual-axis hydraulic inertial isolators, an array of accelerometers, and a controller. The controller inputs signals from the accelerometers and outputs signals to tune the isolators to minimize the vibration transmitted from a vibrating body to an isolated body. The isolators are tuned by varying the dimensions of their tuning passages or by application of magnetohydrodynamic force to the liquid within the tuning passages.
    Type: Grant
    Filed: January 17, 1997
    Date of Patent: January 6, 1998
    Assignee: Bell Helicopter
    Inventors: Michael Reaugh Smith, Frank Bradley Stamps