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. 09, 2014
Filed:
Feb. 07, 2013
Nihon Dempa Kogyo Co., Ltd., Tokyo, JP;
Yoji Naka, Saitama, JP;
Nihon Dempa Kogyo Co., Ltd., Tokyo, JP;
Abstract
An ultrasonic transducer includes an ultrasonic transmitting and receiving portion, a housing, a driving device, a casing, a first volume compensation mechanism, a ventilating portion, a diaphragm, and a component. The housing houses the ultrasonic transmitting and receiving portion, and the housing seals ultrasonic propagation liquid. The driving device is configured to drive the ultrasonic transmitting and receiving portion. The casing houses the driving device. The first volume compensation mechanism is configured to absorb a volume change of the ultrasonic propagation liquid. The diaphragm divides an internal space of the casing into at least a first internal space and a second internal space. The ventilating portion is configured to ventilate the first internal space to outside of the casing. The component is disposed in a space other than the first internal space in the internal space and includes a frame ground that electrically connects to an electrical circuit.