| 摘要 |
PROBLEM TO BE SOLVED: To provide a convenient liquid metering vessel of simple structure. SOLUTION: The liquid metering vessel comprises a vessel body 1, a main cylinder 11 in which a circumferential wall 12 fitted to a neck part of the vessel body is suspended from the outer circumference of a flanged top wall 13, a guide cylinder 16 and a spouting cylinder 17 are erected from an inner circumferential part and an outer circumferential part of the flanged top wall, respectively, a slidable cylindrical member 31 in which a lower cylindrical part 33 of the cylindrical part is passed through a flanged hole 15 at the center of the flanged top wall, a seal part 35 having the outside diameter larger than the diameter of the flanged hole is suspended from the outer circumference of a bottom plate 34 at a lower end of the lower cylindrical part, a small diameter piston 37 and a large diameter piston 39 are attached to an outer surface of the lower end of an upper cylindrical part of the cylindrical part and to a tip of an outwardly directed flange 38 protruded from a middle part of an upper cylindrical part 36, respectively, the small diameter piston and the large diameter piston 39 are abutted on an inner surface of the guide cylinder 16 and an inner surface of a spouting cylinder 17, respectively, and a cap 51 in which a female screw cylinder 53 suspended from the outer circumference of a top plate is screwed to the outer surface of the spouting cylinder 17, and a depressing cylinder 54 is suspended from a lower side of the top plate. The slidable cylindrical member can be depressed to a lower limit by the depressing cylinder 54, and a liquid passing hole 40 is formed in the lower cylindrical part 33. |
