Device for storing and extending a flexible pipe for supplying conditioned air to an aircraft on the ground or any other interior space, the said device comprising: (a) a tubular housing extending along a longitudinal axis Z and comprising a first free and open end, the said tubular housing serving to store (b) a flexible pipe comprising a downstream end which is free and an upstream end which can be in fluidic communication with an air conditioning unit and which is remote from the first end of the housing, (c) a drive system comprising N = 4 to 8 drive bearings (6.1-6.6) arranged around and each perpendicular to the longitudinal axis Z, distributed around a perimeter of the flexible pipe and located adjacent to the first end of the housing, a first drive bearing (6.1) being connected to a motor that can control its rotation about its axis, the said first drive bearing being connected in series to the N-1 other drive bearings by rotation joints (7.1-7.6) making it possible to transmit a rotation from the first drive bearing to the N-1 other drive bearings, the rotation of the N drive bearings making it possible to control, in a first direction of rotation, the extension and, in a second direction of rotation, the contraction of the flexible pipe between (i) a contracted configuration in which the downstream end of the flexible pipe is located in the housing and adjacent to the first end of the housing, and (ii) an extended configuration in which the downstream end of the flexible pipe is outside the housing and remote from the first end of the housing, characterized in that the N th drive bearing is itself connected by a rotation joint to the first drive bearing, thus forming a closed chain of N drive bearings connected to one another by N rotation joints. (a) a tubular housing extending along a longitudinal axis Z and comprising a first free and open end, the said tubular housing serving to store (b) a flexible pipe comprising a downstream end which is free and an upstream end which can be in fluidic communication with an air conditioning unit and which is remote from the first end of the housing, (c) a drive system comprising N = 4 to 8 drive bearings (6.1-6.6) arranged around and each perpendicular to the longitudinal axis Z, distributed around a perimeter of the flexible pipe and located adjacent to the first end of the housing, a first drive bearing (6.1) being connected to a motor that can control its rotation about its axis, the said first drive bearing being connected in series to the N-1 other drive bearings by rotation joints (7.1-7.6) making it possible to transmit a rotation from the first drive bearing to the N-1 other drive bearings, the rotation of the N drive bearings making it possible to control, in a first direction of rotation, the extension and, in a second direction of rotation, the contraction of the flexible pipe between (i) a contracted configuration in which the downstream end of the flexible pipe is located in the housing and adjacent to the first end of the housing, and (ii) an extended configuration in which the downstream end of the flexible pipe is outside the housing and remote from the first end of the housing, characterized in that the N th drive bearing is itself connected by a rotation joint to the first drive bearing, thus forming a closed chain of N drive bearings connected to one another by N rotation joints. (i) a contracted configuration in which the downstream end of the flexible pipe is located in the housing and adjacent to the first end of the housing, and (ii) an extended configuration in which the downstream end of the flexible pipe is outside the housing and remote from the first end of the housing,