Patent ID: 8459862
Filing Date: 2013-06-11
Classification: B01F,G01N

Abstract:
1. A stirring device comprising: a case for holding a sample liquid, the case having a sidewall and a bottom face with a concave portion and a ledge portion completely surrounding the concave portion; and a rotor that stirs the sample liquid by being rotated by magnetic force, imparted from outside the case, along the ledge portion of the case in the sample liquid held inside the case, with only a first end portion and a second end portion, which is opposite to the first end portion, of the rotor coming into contact with the ledge portion of the case, wherein the concave portion of the bottom face is formed around a central axis of the bottom face, wherein the ledge portion extends from the sidewall to the concave portion, and wherein a width of the ledge portion between a first portion of the sidewall and the concave portion along a straight line that passes through the first portion of the sidewall, the central axis of the bottom face and a second portion of the sidewall, which is on an opposite side of the central axis of the bottom face than the first portion of the sidewall, is larger than a gap formed between the first end portion of the rotor and the first portion of the sidewall when the rotor is coaxial with the straight line and the second end portion of the rotor is in contact with the second portion of the sidewall.