| 摘要 |
PURPOSE: To enable the engagement of a holder arrangement to be released at an arbitrary point of time during the operation and stoppage of a motor by disposing a coupling between the holder arrangement, which is able to be displaced along a stand post, and a lifting arrangement. CONSTITUTION: A height adjustable stand 1 for laboratory equipment, in particular for rotary evaporators, has a holder arrangement 6. The holder arrangement 6 is able to vertically displaced along the stand post 5. The holder device 6 can be vertically raised or lowered with the motor-driven lifting arrangement 9, 11. The coupling 12, which is connected and released by power driving, is disposed between the holder arrangement 6 and the lifting arrangement 9, 11. |
