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:
Mar. 28, 2006
Filed:
Jan. 08, 2004
Masahiro Kurihara, Yokohama, JP;
Kazuo Takei, Tokyo, JP;
Kunio Hashiba, Tokyo, JP;
Kageyoshi Katakura, Tokyo, JP;
Masahiro Kurihara, Yokohama, JP;
Kazuo Takei, Tokyo, JP;
Kunio Hashiba, Tokyo, JP;
Kageyoshi Katakura, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Embodiments of the invention provide a water treatment method and water treatment device capable of automatically tracking the frequency of ultrasonic waves and automatically controlling their amplitude such that optimal cavitation is generated. In one embodiment, a water treatment method of sterilizing water containing microbes comprises supplying ultrasonic vibration to the water to be treated by driving and controlling a transducer of a sterilization cell using a signal; detecting an amplitude of the transducer and a frequency of the signal applied to the transducer; and controlling the amplitude and a vibration frequency of the transducer to target values in accordance with the detected transducer amplitude and the detected signal frequency.