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. 13, 2005
Filed:
May. 20, 2002
Kohji Toda, Yokosuka, JP;
Kohji Toda, Yokosuka, JP;
Other;
Abstract
An ultrasound radiation device comprises a piezoelectric substrate, an interdigital arrangement of two comb-shaped electrodes formed on an upper end surface of the piezoelectric substrate, a counter electrode formed on a lower end surface of the piezoelectric substrate, an interdigital transducer formed on said upper end surface of said piezoelectric substrate, and an amplifier between one of the two comb-shaped electrodes and the interdigital transducer. If an electric signal is applied between the counter electrode and one of the two comb-shaped electrodes, a longitudinal wave composed of the main lobe and grating lobes is radiated into a material in contact with the counter electrode, as well as a Lamb wave is excited in the piezoelectric substrate. The Lamb wave is detected as a delayed electric signal at the interdigital transducer. The delayed electric signal is amplified by the amplifier, and used as an input electric signal again.