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Mechanism comprised of ultrasonic lead screw motor

  • US 7,170,214 B2
  • Filed: 06/14/2005
  • Issued: 01/30/2007
  • Est. Priority Date: 09/08/2003
  • Status: Expired due to Term
First Claim
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1. An apparatus for driving a threaded shaft assembly comprised of a threaded shaft with an axis of rotation and, engaged therewith, a threaded nut, wherein said assembly is comprised of means for subjecting said threaded nut to ultrasonic vibrations and thereby causing said threaded shaft to simultaneously rotate and translate in the axial direction through said nut, thus applying an axial force in said axial direction.

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