|
(11) | EP 1 053 968 A3 |
(12) | EUROPEAN PATENT APPLICATION |
|
|
|
|
|||||||||||||||||||||||
(54) | Stairlift for variable-slope flight portions |
(57) A stairlift for variable-slope flight portions which comprises an upper guiding bar
(2) and a lower guiding bar (3) which can be fixed to a fixed structure (5) and have
a constant distance in a vertical direction. A movable frame (10) is slideable on
the guiding bars (2,3) and supports an actuation motor (11). A main driving pinion
(21) is actuated by the motor (11) and meshes with an upper toothed guide (25) formed
on the upper guiding bar (2), and a stabilizer pinion (30) meshes with a lower toothed
guide (31) which is formed on the lower guiding bar (3). The stabilizer pinion (30)
is freely rotatable if the inclination of the guiding bars (2,3) exceeds a preset
value, whereas the stabilizer pinion (30) is connected to the main driving pinion
(21) if the inclination of the guiding bars (2,3) is lower than the preset value. |