Patent ID: 7296590
Filing Date: 2007-11-20
Classification: B01L,G01N,Y10T

Abstract:
1. A liquid suction device designed to for sucking liquid contained in a vessel and, comprising: a liquid retention room inserted into the vessel via an opening at an upper part of the vessel and dipped in the liquid, the liquid retention room having an inflow port and an exhaust port; a suction tube connected to the exhaust port and extending from the opening of the vessel; and a float member provided in the liquid retention room, the float member opening and closing the exhaust port, wherein the liquid is retained in the liquid retention room when the retention room is dipped in the liquid, the float member is floated upward so as to open the exhaust port, the liquid in the vessel is sucked outward via the inflow port, the liquid retention room, the exhaust port and the suction tube, the retained liquid is exhausted from the inflow port when the liquid in the vessel is lessened to reach a predetermined volume or below, and the exhaust port is closed by means of the float member; and a base-end member having first and second openings to atmospheric air and mounted on the opening of the vessel; a first opening and closing means and a second opening and closing means for respectively opening and closing the first and the second atmospheric-air openings.