| 主权项 |
1. A stirrer device (1a; 1b) including:
at least one shaft (13; 14), a first blade-type stirrer assembly (3) and a second blade-type stirrer assembly (2), each blade-type stirrer assembly (2, 3) including a blade body (7, 6) directly or indirectly mounted on and constrained to rotate with said shaft (13; 14), each blade body (7, 6) carrying at least one blade (5, 4), said first and second stirrer assemblies (2, 3) being axially movable relative to each other, wherein the blade body (6) of the second stirrer assembly (2) is permanently mounted on the blade body (7) of the first stirrer assembly (3) so as to nest freely and telescopically with the blade body (7) of the first stirrer assembly between at least two positions, a close-together position corresponding to a short configuration in which the blade bodies (7, 6) of the stirrer assemblies (2, 3) are close together in the axial direction and a spaced-apart position corresponding to a long configuration in which the blade bodies (7, 6) of the stirrer assemblies (2, 3) are spaced apart from each other in the axial direction, at least the extreme spaced-apart position being defined by an abutment, and wherein the blade body (6) of the second stirrer assembly (2) and the blade body (7) of the first stirrer assembly (3) telescopically slide one inside another. |
