Powered surgical tool with transmission
AssigneeGlobus Medical, Inc.
InventorsPeter L. Bono, James D. Lark, Marshal Eric Finley, Corey Freimark
Life of this patent
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Abstract
An oscillating drive mechanism for a surgical tool includes a motor having a rotor, a crank assembly hub, a link secured to the crank assembly hub, a pivot shaft, a shuttle including an arcuate rack gear secured to the link so that rotation of the crank assembly hub provides reciprocating rotary motion to the arcuate rack gear about the pivot shaft. A gear is meshed with the arcuate rack gear and is secured to an output shaft, whereby rotational motion of the motor induces rotary oscillating motion to the output shaft.
Claims15
An oscillating drive mechanism for a surgical tool comprising:
- a motor, the motor having a rotor rotationally secured within the motor, a shaft secured to the rotor to rotate therewith;
- a crank assembly hub secured to the shaft to rotate with the rotor and shaft;
- a link secured to the crank assembly hub, a longitudinal axis of the link positioned at an acute angle relative to a longitudinal axis of the output shaft of the motor so that the longitudinal axis of the link and the output shaft of the motor intersect at a point beyond the distal end of the output shaft;
- a pivot shaft positioned at the intersection of the longitudinal axis of the output shaft of the motor and the longitudinal axis of the link the pivot shaft being constructed and arranged to prevent rotation of the link around its longitudinal axis while allowing the longitudinal axis of the link to rotate around the longitudinal axis of the output shaft of the motor during rotation of the crank assembly hub;
- a shuttle including an arcuate rack gear secured to the link so that rotation of the crank assembly hub provides reciprocating rotary motion to the arcuate rack gear about the pivot shaft;
- a gear meshed with the arcuate rack gear, the gear secured to an output shaft;
- wherein rotational motion of the motor induces rotary oscillating motion to the output shaft.
Dependencies are inferred from the claim text.