Patent ID: 6740206
Filing Date: 2004-05-25
Classification: B01D

Abstract:
A rotary evaporator comprisinga) a rotating flask (2) to hold substances to be evaporated and b) a drive means (6) to rotate the rotating flask around an axis of rotation (R) that runs through the rotating flask, c) the rotating flask can be swiveled around a swiveling axis (S) that c1) runs outside of the rotating flask and, c2) runs above the axis of rotation of the rotating flask relative to the force of gravity (G) d) wherein the rotating flask (2) is connected to a first vapor line (26) that does not rotate with the rotating flask (2) and wherein at least one flexible compensating element (50) is provided between a vertical line section (25) of the first vapor line (26) and a second vapor line (27) such that the first vapor line (26) extending between the rotating flask and the compensating element (50) can be swiveled with the rotating flask (2) around the swiveling axis and the second vapor line (27), which follows the compensating element (50) and which cannot be swiveled together with the rotating flask (2) around the swiveling axis (S), and the at least one compensating element (50) connects a vertical line section (25) of the first vapor line (26) with the second vapor line (27) such that said compensating element (50) compensates for the position change between the vertical line section (25) of the first vapor line (26) and the second vapor line (27) that is caused by the swiveling motion.