Patents Assigned to Longyear™, Inc.
  • Variable force/variable frequency sonic drill head
    Patent number: 8347984
    Abstract: An oscillator assembly includes a first eccentrically weighted rotor having a first eccentric weight configured to rotate about an axis, a second eccentrically weighted rotor having a second eccentric weight configured to rotate about the axis. Rotation of the first eccentrically weighted rotor is coupled to rotation of the second eccentrically weighted rotor. An actuator is configured to vary an angular separation between the first eccentric weight and the second eccentric weight.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: January 8, 2013
    Assignee: Longyear™, Inc.
    Inventor: Trevor Lyndon Light