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:
Aug. 15, 2023
Filed:
Jun. 15, 2020
Google Llc, Mountain View, CA (US);
James East, San Jose, CA (US);
Neil John Harris, Los Altos, CA (US);
Google LLC, Mountain View, CA (US);
Abstract
A transducer () having a mechanical impedance over an operative frequency range and having a desired power coupling () to a load over the operative frequency range comprises a piezoelectric device () having a frequency distribution of modes in the operative frequency range; and an overmould (). The overmould () is arranged to surround at least part of the piezoelectric device (); and the parameters of the overmould () are selected to provide a required impedance matching between the mechanical impedance of the transducer () and the mechanical impedance of the load. An alternative transducer comprises a mounting means for holding a discrete portion of at least a part of the periphery of the piezoelectric device wherein the parameters of the mounting means are selected to provide a required boundary condition for the periphery of the piezoelectric device whereby the desired power coupling between the transducer and the load is provided.