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:
Jan. 15, 2013
Filed:
Sep. 24, 2010
Junichi Nishie, Kyoto, JP;
Takaaki Asada, Moriyama, JP;
Mio Furuya, Chiangmai, TH;
Takayuki Shimamoto, Moriyama, JP;
Kazuhiro Ebara, Yasu, JP;
Junichi Nishie, Kyoto, JP;
Takaaki Asada, Moriyama, JP;
Mio Furuya, Chiangmai, TH;
Takayuki Shimamoto, Moriyama, JP;
Kazuhiro Ebara, Yasu, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
An ultrasonic transducer includes a case, a reflective portion, and a piezoelectric body. The case has a substantially cylindrical shape including one closed end in the center axis direction that defines a top. The piezoelectric body is disposed on the inner surface of the top of the case. The reflective portion is arranged to oppose and be spaced apart from the piezoelectric body. The distance between the piezoelectric body and the reflective portion is greater than the maximum displacement of the piezoelectric body and is substantially an odd number multiple of a ¼ wavelength of sound waves or less than or equal to the ¼ wavelength.