Pumps – One fluid pumped by contact or entrainment with another – Jet
Patent
1996-09-06
1998-03-24
Thorpe, Timothy
Pumps
One fluid pumped by contact or entrainment with another
Jet
417186, 417306, 4171992, F04F 548
Patent
active
057305854
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.
REFERENCES:
patent: 970232 (1910-09-01), Jakway
patent: 1527135 (1925-02-01), Hepburn et al.
patent: 1743761 (1930-01-01), Engstrand
patent: 2381589 (1945-08-01), Hayes
patent: 3563049 (1971-02-01), Schnerring
patent: 3730646 (1973-05-01), Affri et al.
patent: 4515180 (1985-05-01), Napolitano
patent: 4932842 (1990-06-01), Dietrick et al.
Journal of Fluids Engineering, vol. 96, No. 3, Sep. 1994, pp. 216-226 "Jet Breakup and Mixing Throat Lengths for the Liquid Jet Gas Pump".
Arimoto Keigo
Kanai Kunio
Kurematsu Masayuki
Nishikawa Hidetoshi
Kim Ted
Noritsu Koki Co., Ltd.
Thorpe Timothy
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