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:
Sep. 04, 2007
Filed:
Oct. 04, 2002
Dominique Cathignol, Genas, FR;
Dominique Cathignol, Genas, FR;
Institut National de la Sante et de LacRecherchedMedicale, Paris Cedex, FR;
Abstract
A device for producing high pressure ultrasound pulses. The device includes an ultrasound source having a piezoelectric transducer provided with electrodes and presenting polarization in a given direction (f). An electrical voltage is applied to the electrodes to emit an ultrasound wave and to apply an electric field in a direction (f) opposite to the polarization direction (f) in order to compress the ultrasound transducer. A transient electric field having the same direction (f) as the polarization direction (f) is then applied so as to cause a compression ultrasound wave to be emitted in the coupling medium.