US 12,341,443 B2
Rotary piezoelectric motor, in particular for watchmaking
Jean-Jacques Born, Morges (CH); Yvan Ferri, Lausanne (CH); Alexandre Didier, Erlach (CH); Lionel Paratte, Marin-Epagnier (CH); and Léonard Testori, Bienne (CH)
Assigned to The Swatch Group Research and Development Ltd, Marin (CH)
Filed by The Swatch Group Research and Development Ltd, Marin (CH)
Filed on Dec. 5, 2022, as Appl. No. 18/074,886.
Claims priority of application No. 21216102 (EP), filed on Dec. 20, 2021.
Prior Publication US 2023/0198429 A1, Jun. 22, 2023
Int. Cl. H02N 2/10 (2006.01); G04C 3/12 (2006.01); H02N 2/12 (2006.01)
CPC H02N 2/103 (2013.01) [G04C 3/12 (2013.01); H02N 2/123 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A rotary piezoelectric motor, in particular for a timepiece, the rotary piezoelectric motor comprising:
a rotor configured to be able to rotate and actuate a mechanical device; and
a stator configured to make the rotor rotate, the stator comprising a piezoelectric actuator provided with a resonator arranged to perform an oscillatory motion,
wherein the stator comprises a fixed element and the resonator comprises a movable element arranged at a distance from the fixed element and connected to the fixed element, the piezoelectric actuator being configured to move the movable element against the rotor to cause the rotor to rotate in a first direction.