The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 10, 2025
Filed:
Sep. 07, 2022
The Swatch Group Research and Development Ltd, Marin, CH;
The Swatch Group Research and Development Ltd, Marin, CH;
Abstract
A piezoelectric balance spring () for a circuit () for self-regulating an oscillation frequency of an oscillating mechanical system (), or an energy recovery circuit or a motor circuit for actuating the movement or for the automatic maintenance thereof. The piezoelectric balance spring () includes at least one piezoelectric layer (') provided on a top face () or bottom face of a certain number of coils of the spring in a plane, and at least two pairs of electrodes (), whereby the electrodes of each pair are provided on two opposing faces of the same piezoelectric layer or respectively two piezoelectric layers so as to apply a reverse bias voltage on each pair of electrodes.