Ultrasonic lead screw motor
First Claim
Patent Images
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:
- (a) said assembly comprises 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, (b) said threaded shaft is operatively connected to a load in said axial direction, and (c) said assembly also is comprised of means for applying an axial force to said threaded shaft.
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Accused Products
Abstract
An apparatus for driving a threaded shaft assembly that contains a threaded shaft with an axis of rotation and, engaged therewith, a threaded nut. Subjecting the threaded nut to ultrasonic vibrations causes the threaded shaft to simultaneously rotate and translate in the axial direction. The threaded shaft is connected to a load that applies an axial force to the threaded shaft.
167 Citations
24 Claims
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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:
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(a) said assembly comprises 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, (b) said threaded shaft is operatively connected to a load in said axial direction, and (c) said assembly also is comprised of means for applying an axial force to said threaded shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 21, 22)
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18. 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:
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(a) said assembly comprises means for subjecting said threaded nut to ultrasonic vibrations and thereby causing said threaded shaft to simultaneously rotate and translate in the axial direction, (b) said threaded shaft is operatively connected to a load, and (c) said assembly also is comprised of means for applying an axial force to said threaded shaft, wherein said threaded shaft is disposed within a housing, and wherein said threaded shaft is connected to a knob. - View Dependent Claims (19, 20)
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23. 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:
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(a) said assembly comprises 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, (b) said threaded shaft is operatively connected to a load in said axial direction, and (c) said assembly also is comprised of means for applying an axial force to said threaded shaft, and (d) said rotation through said nut occurs through at least 360 degrees.
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24. 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:
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(a) said assembly comprises 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, (b) said threaded shaft is operatively connected to a load in said axial direction, and (c) said assembly also is comprised of means for applying an axial force to said threaded shaft, and (d) said rotation and said translation in said axial direction through said nut occurs over a distance greater than the amplitude of any single amplitude of said ultrasonic vibration.
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Specification