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:
Sep. 23, 1997
Filed:
Jan. 25, 1996
Kenichi Sasaki, Kanagawa-ken, JP;
Takayuki Saito, Kanagawa-ken, JP;
Ken Nakajima, Kanagawa-ken, JP;
Mitsuru Imai, Kanagawa-ken, JP;
Ebara Corporation, Tokyo, JP;
Abstract
In an ozonized water producing apparatus in which a pressurized ozone gas generated by an electric discharge type ozonizer is dissolved in water to be treated through a porous hollow-fiber membrane, an infinite variable-speed control type pump is provided upstream of the hollow-fiber membrane to maintain the water pressure inside the hollow fibers higher than the ozone gas pressure and to control the water pressure and flow rate, and a control mechanism is provided to control the ozone concentration in the treated water on the basis of the ozone gas concentration. Thereby treated water containing neither tiny bubbles nor impurities is obtained, and the concentration, flow rate and pressure of the treated water are controlled at constant levels.