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. 08, 2015
Filed:
Oct. 18, 2012
Riso Kagaku Corporation, Tokyo, JP;
Masao Suzuki, Ibaraki-ken, JP;
RISO KAGAKU CORPORATION, Tokyo, JP;
Abstract
As a transmitting horn or a receiving horn attached to a transmission element or a reception element of an ultrasonic sensor, a horn enclosure with two acoustic horn bodies having a dimensional difference ΔLh of a quarter λ/4 of the wavelength λ of an ultrasonic wave U in the propagation direction X of the ultrasonic wave U or a reflection wave R is used. Then, the amplitude of a diffraction wave Aand the amplitude of a diffraction wave Ain opposite phase between a transmission side and a reception side are caused to match with each other so as to cancel out both the diffraction waves A, Ain a common sound space of the horn enclosure, which is not partitioned for each acoustic horn body by a screen, on a front of the reception element.