Apparatus and method for a high speed rotation-to-rotation oscillation converter for surgical use
OwnerDouglas P. Kiesterinventor
Life of this patent
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Abstract
A converter for use in a high speed rotationally oscillating surgical burring device comprises an output shaft, and a rotationally oscillating secondary drive rotor coupled to the output shaft. The secondary drive rotor is arranged and configured with a size and mass to minimize its angular momentum. A unidirectionally rotating primary drive rotor is provided. A linearly reciprocating transmission converts unidirectional rotation to bidirectional rotational oscillation coupling the primary and secondary drive rotors. The transmission is arranged and configured with a size and mass to minimize its linear momentum. An input shaft is coupled to the rotating primary drive rotor to which a unidirectional rotational force is applied.
Claims10
A converter for use in a high speed rotationally oscillating surgical burring device comprising:
- an output shaft;
- a rotationally oscillating secondary drive rotor coupled to the output shaft, the secondary drive rotor being arranged and configured with a size and mass to minimize its angular momentum;
- a unidirectionally rotating primary drive rotor;
- a linearly reciprocating transmission for converting unidirectional rotation to bidirectional rotational oscillation coupling the primary and secondary drive rotors, the transmission being arranged and configured with a size and mass to minimize its linear momentum;
- and
- an input shaft coupled to the rotating primary drive rotor to which a unidirectional rotational force is applied,
- wherein the secondary drive rotor has a spiral slot defined therethrough, and where the transmission comprises:
- a drive pin disposed through the spiral slot, so that the secondary drive rotor rotationally oscillates as the drive pin longitudinally reciprocates;
- a stationary guide having a linear slot defined therethrough through which the drive pin is disposed to maintain the drive pin in a fixed plane of oscillatory linear motion;
- and
- a cam follower coupled to the drive pin where the primary drive rotor has a cylindrical bore in which an elliptical groove is defined, the cam follower engaging the elliptical groove so that the drive pin is longitudinally reciprocated within the primary drive rotor as the primary drive rotor unidirectionally rotates.
A converter for use in a high speed oscillating surgical burring device comprising:
- an output shaft;
- a secondary drive rotor coupled to the output shaft, the secondary drive rotor having a spiral slot defined therethrough and being arranged and configured with a size and mass to minimize its angular momentum;
- a drive pin being disposed through the spiral slot, so that the secondary drive rotor rotationally oscillates as the drive pin longitudinally reciprocates;
- a stationary guide having a linear slot defined therethrough through which the drive pin is disposed to maintain the drive pin in a fixed plane of oscillatory linear motion;
- and
- a cam follower coupled to the drive pin;
- a primary drive rotor having a cylindrical bore;
- a pair of elliptical intersecting grooves defined in the cylindrical bore, the cam follower engaging the pair of elliptical grooves so that the drive pin is longitudinally reciprocated within the primary drive rotor as the primary drive rotor unidirectionally rotates;
- and
- an input shaft coupled to the primary drive rotor and to which input shaft a unidirectional rotational force is applied.
Dependencies are inferred from the claim text.