Drive unit for pyramid e.g. Christmas pyramid, has two counter-rotating impellers, where one impeller is supported above pyramid sections in hanging position and another impeller is supported on pyramid base in supporting position

摘要

The unit has two counter-rotating impellers (12, 14) arranged one above the other. One of the impellers is connected with pyramid sections (9, 10) by a hollow shaft (6). Another impeller is fastened on a central shaft (4), and is connected with the pyramid sections. One of the impeller is supported above the pyramid sections in a hanging position and another impeller is supported on a pyramid base in a supporting position.