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:
Dec. 01, 2020
Filed:
Feb. 06, 2018
Sensus Spectrum, Llc, Morrisville, NC (US);
Justin Rorke Buckland, Cambridge, GB;
Sensus Spectrum, LLC, Morrisville, NC (US);
Abstract
Ultrasonic devices include a transducer having a piezoelectric element therein that may operate as an acoustic signal receiving surface and/or an acoustic signal generating surface. At least one acoustic matching layer is provided on the piezoelectric element. This at least one acoustic matching layer may be configured as a composite of N acoustic matching layers, with a first of the N acoustic matching layers contacting the primary surface of the piezoelectric element. This first acoustic matching layer may have an acoustic impedance equivalent to Z, where N is a positive integer greater than zero. In some embodiments of the invention, the magnitude of Zmay be defined as: 0.75 ((Z)(Z))≤Z≤1.25 ((Z)(Z)), where Zis the acoustic impedance of the piezoelectric element (e.g., lead zirconate titanate (PZT)) and Zis the acoustic impedance of a compatible gas.