Abstract: A water bath shaker apparatus including a drive mechanism for producing a shaking motion and equipped with a tube for accommodating water, and a shelf having secured thereto a container of liquid to be shaken such as, for example, Erlenmeyer flasks. The tub has a filling zone for the water bath in the form of a closed ring with a central passage for the drive shaft of the drive mechanism, with the shelf being essentially constructed as a circular ring and being mounted at the upper end of the drive shaft so as to be driven by the drive shaft.

Abstract: An infusion pump for controllable long-term injection of solutions from a syringe which can be emptied in a controlled manner for use with medical drugs in large doses. The infusion pump has a holding device for at least one syringe and an actuating device for the piston of the syringe which is connected to an electrical control drive, and an electrical battery for the drive. The actuating device is provided with a storage device for mechanical work acting through a detent member in the sense of the drive. The electrical control drive is adapted to release a retarding device when switched on, and to actuate the retarding device when switched off.