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. 24, 1998
Filed:
Sep. 06, 1996
Hidetoshi Nishikawa, Wakayama, JP;
Keigo Arimoto, Wakayama, JP;
Kunio Kanai, Hino, JP;
Masayuki Kurematsu, Hino, JP;
Noritsu Koki Co., Ltd., Wakayama, JP;
Abstract
An apparatus for vacuum absorption is provided which is quiet and simplified with maintaining an absorption power. The apparatus comprises: a tank for accumulating circulating water; a waterway for circulating the circulating water by a pump disposed at an absorption inlet side of the waterway and having an outlet disposed over the water surface of the circulating water in the tank; an aspirator disposed on the waterway; and a reverseflow prevention mechanism surrounding the outlet, having a small hole of the size to drain less volume of water than the volume flowing out of the outlet at the position sunk under the water, and comprising a buffer (hollow body) with drain windows at the position over the water surface. The apparatus serves to drain the circulating water into the water during the operation of the pump and to absorb air from the outlet into the vacuum vessel during the stoppage of the pump.