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:
Apr. 21, 2009
Filed:
Aug. 30, 2007
Kiyonari Kojima, Nishikamo-gun, JP;
Toshihiro Hattori, Okazaki, JP;
Mitsuyasu Matsuura, Chiryu, JP;
Ayako Okamoto, Okazaki, JP;
Mitsuru Fujita, Toyohashi, JP;
Kiyonari Kojima, Nishikamo-gun, JP;
Toshihiro Hattori, Okazaki, JP;
Mitsuyasu Matsuura, Chiryu, JP;
Ayako Okamoto, Okazaki, JP;
Mitsuru Fujita, Toyohashi, JP;
Denso Corporation, Kariya, JP;
Nippon Soken, Inc., Nishio, JP;
Abstract
An ultrasonic sensor includes: a first vibrator for transmitting an ultrasonic wave; multiple second vibrators for outputting a reception signal of a reflection wave; a casing having a bottom for accommodating the vibrators, an outer surface of the bottom providing a vibrating surface; and multiple tubes for guiding the ultrasonic wave. Each tube has a first opening coupled with an outside of a mobile body. An area of the first opening is smaller than an area of the vibrating surface. A distance between two adjacent first openings is smaller than a distance between two adjacent vibrating surfaces. The length of the tubes is determined to equalize a phase difference of the reflection waves at the first openings is equal to that at the vibrating surfaces.