Patent ID: 7469608

Claim:
A dissolution tester comprising: a circular water tank having a circular cross section, the tank being disposed on a base and containing constant-temperature water the tank comprising: a water-tank main body having a circular cross section and a circular heater for regulating the temperature of the constant-temperature water inside the water-tank main body, the circular heater being provided concentrically at the bottom inside the water-tank main body; a head disposed above the circular water tank, which moves up and down relative to the base; a cantilever arm for supporting the head in a cantilevered fashion and for moving the head up and down relative to the base; a vessel in which a sample and a test liquid are placed, a desired portion of the vessel being immersed into the constant-temperature water in the circular water tank; a test-liquid agitator suspended from the head, for agitating the sample and the test liquid inside the vessel; and an agitator for agitating the constant-temperature water inside the water-tank main body, the agitator being provided at a center at the bottom inside the water-tank main body.