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US 9,283,113 B2Granted
Ultrasonic hand piece
AssigneeNovartis AG
InventorsJames Chon, John Zhongyu Yan
Life of this patent
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Abstract
A surgical hand piece comprises a generally cylindrical horn with a flange on one end. The flange has a central hub and first and second protruding sections. First and second polarized piezoelectric crystals are held against the flange such that rotative or torsional motion is induced in the horn.
Claims14
A surgical hand piece comprising:
- a generally cylindrical horn with a flange on one end, the flange having a central hub and first and second protruding sections, the first and second protruding sections each having first and second sides;
- a first piezoelectric crystal held against the horn, the first piezoelectric crystal having a semicircular shape with an inner circumference, an outer circumference, and first and second ends;
- a second piezoelectric crystal held against the horn, the second piezoelectric crystal having a semicircular shape with an inner circumference, an outer circumference, and first and second ends;
- wherein the inner circumference of the first piezoelectric crystal is held against a periphery of the hub, the first end of the first piezoelectric crystal is held against the first side of the first protruding section, and the second end of the first piezoelectric crystal is held against the first side of the second protruding section;
- and
- further wherein the inner circumference of the second piezoelectric crystal is held against a periphery of the hub, the first end of the second piezoelectric crystal is held against the second side of the first protruding section, and the second end of the second piezoelectric crystal is held against the second side of the second protruding section.
3 more elements
Dependencies are inferred from the claim text.