Non-intrusive agitation of a fluid medium

摘要

PCT No. PCT/GB84/00404 Sec. 371 Date Jul. 8, 1985 Sec. 102(e) Date Jul. 8, 1985 PCT Filed Nov. 26, 1984 PCT Pub. No. WO85/02352 PCT Pub. Date Jun. 6, 1985.Impeller means (4 and 5) is provided in a container (2) for agitating fluid. The impeller means is movable to effect fluid flow. The impeller means includes an impeller (4) which is separate from a wall portion of the container to a point of which the impeller (4) is connected by supporting means (5). Movement of the impeller means relative to the wall portion is achieved by making the impeller means flexible. A vibrator (6) may be provided to cause movement of the impeller means. The characteristics of the components can be chosen so that when the vibrator is activated the impeller vibrates with a greater amplitude than the wall portion (3). This can be achieved by vibrating the wall portion at a frequency approximately equal to a resonant frequency of the impeller means.