Patent Description:
The disclosure can be applied in heavy-duty vehicles, such as trucks, buses, and construction equipment. Although the disclosure will be described with respect to a particular vehicle, the disclosure is not restricted to any particular vehicle.

The cab of known vehicles such as trucks and cars usually includes lateral doors with windows, so that the driver and passengers may see the area outside from the vehicle through the window when sitting inside the vehicle. The window of each door is usually mobile between a closed position and an open position, e.g. for venting the interior of the vehicle. Some vehicles also have fixed windows, for improving the driver and passenger's visibility. However, the surface area of the windows is often limited by the mechanism that drives the mobile window between the open and closed positions. When the mobile window equips a door of the vehicle, available space for arranging windows is limited by the frame structure of the door itself but also by said mechanism, which is usually arranged inside the doord, at a bottom part of the door under the mobile window.

The disclosure proposes to improve a driver's and/or passengers visibility, while still enabling mobility of the window of a vehicle.

An aspect of the disclosure concerns a window assembly for a vehicle, the window assembly comprising a first drive, comprising a first stator and a first rotor, the first rotor being arranged around the first stator for rotating relative to the first stator, about a first longitudinal axis fixed relative to the first stator, when the first drive is electrically powered. The window assembly futher comprises a mobile window, having a transversal edge and a first longitudinal edge, the mobile window being configured for sliding relative to the first stator substantially parallel to the first longitudinal axis, between an open position where the transversal edge is positioned at a first longitudinal end of the first drive and the first longitudinal edge is positioned along the first drive, and a closed position where the transversal edge is positioned at a second longitudinal end of the first drive and where the first longitudinal edge is positioned passed the first drive along the first longitudinal axis. The window assembly further comprises a first transmission mechanism, the mobile window being driven between the open position and the closed position by the rotation of the first rotor, via the first transmission mechanism. Furthermore, the transmission mechanism comprises a lead screw, arranged around the first rotor and secured to the first rotor, and a nut, secured to the mobile window and geared with the lead screw. When in use, the first longitudinal axis may substantially be vertical or vertical and the mobile window, when in the closed position, positioned passed the first drive in an upward direction parallel to the first longitudinal axis. Hereby a technical effect is that space is available for placing another window, such as a fixed window, beside the first drive, without any element blocking see-through said other window in this area. In turn, the first drive and the first transmission mechanism may easily be arranged along a frame of the window assembly, such as a door frame, considering that the first drive and first transmission mechanism may easily have, overall, an elongated shape along the first longitudinal axis. If the window assembly is installed in a vehicle door, the first drive may advantageously be arranged along an edge of the door, parallel to the first longitudinal axis, leaving most of the door available for placing the windows. The mobile window may be superposed with said other window when in the open position, still enabling see-through the superposed windows. The mobile window may be positioned passed said other window when the mobile window is in the closed position, enabling see through the two windows at their respective locations. In other words, the window assembly leaves more available space for more window surface, thereby improving the driver's and/or passenger's visibility. The better visibility may improve safety in maneuvering of the vehicle, in particular if the vehicle is a large ground vehicle such as a truck, a construction vehicle, a mining vehicle, a van, a coach or the like. Hereby another technical effect is that the transmission mechanism may be packed with the first drive in a compact manner, while being mechanically efficient and easy maintenance.

In certain examples, the window assembly further comprises a fixed window, fixed relative to the first stator and positioned along the first drive, wherein the mobile window is superposed with the fixed window when the mobile window is in the open position and wherein the mobile window is positioned passed the fixed window when the mobile window is in the closed position. Hereby a technical effect is that the fixed window provides more visibility while not being obstructed by any part required for sliding the mobile window. In this case, the window assembly can especially be used for equipping a vehicle door, with the fixed window at the bottom and the mobile window at the top when in the closed position.

In certain examples, the first drive comprises: a first attachment, for attaching the first stator to a frame of the window assembly, the mobile window being mobile relative to the frame between the closed and the open position, the first attachment being positioned at the first longitudinal end of the first drive, and a second attachment, for attaching the first stator to the frame, the second attachment being positioned at a second longitudinal end of the first drive, opposite to the first longitudinal end of the first drive, the first rotor being arranged between the first attachment and the second attachment. Hereby a technical effect is that the first drive may be reliably attached to the frame of the vehicle by both longitudinal ends, while being compact for leaving available space for said other window, in particular fixed window. This arrangement is especially useful if the window assembly is installed in the vehicle door.

In certain examples, the first transmission mechanism comprises a slider, attached to the mobile window, and a sliding guide, fixed relative to the first stator, the slider being guided by the sliding guide for guiding the sliding of the mobile window between the open position and the closed position. Hereby a technical effect is to obtain stability and reliability of the sliding movement of the mobile window.

In certain examples, the window assembly further comprises a second drive, comprising a second stator and a second rotor, the second rotor being arranged around the second rotor for rotating relative to the second stator, about a second longitudinal axis fixed relative to the second stator and parallel to the first longitudinal axis, when the second drive is electrically powered, the mobile window having a second longitudinal edge opposite to the first longitudinal edge, the transversal edge connecting the first longitudinal edge to the second longitudinal edge, the transversal edge being positioned at a first longitudinal end of the second drive when the mobile window is in the open position, the second longitudinal edge being positioned along the second drive when the mobile window is in the open position, the second longitudinal edge being positioned passed the second drive along the second longitudinal axis when the mobile window is in the closed position. The window assembly may further comprise a second transmission mechanism, the mobile window being driven between the open position and the closed position by rotation of the second rotor, via the second transmission mechanism, in addition to being driven by rotation of the first rotor. Hereby a technical effect is that the first drive and the second drive may be smaller, as their power for moving the mobile window is combined. In embodiments where said other window, e.g. fixed window, is provided, said other window may be placed between the first drive and the second drive. When the mobile window is in the open position, the mobile window is positioned between the first drive and the second drive.

In alternative embodiments, only one drive is provided, e.g. only the first drive and the first transmission mechanism but not the second drive nor the second transmission mechanism. In this alternative embodiment, while the mobile window is driven by the first drive at the first longitudinal edge of the mobile window, a slider and sliding guide may be provided at the second longitudinal edge of the mobile window for guiding the sliding of the mobile window between the open and the closed positions.

Another aspect of the disclosure concerns a vehicle door, comprising the window assembly as defined above.

Another aspect of the disclosure concerns a vehicle, comprising a cab, wherein the cab comprises the window assembly as defined above.

In certain examples, the vehicle is a heavy-duty ground vehicle, such as a truck, a coach, a bus or a van.

The disclosure proposes to improve a driver's visibility and/or to reduce the flowing of water along an area of a ground vehicle to be avoided, such as a side window of the ground vehicle.

<FIG> shows a ground vehicle <NUM> in box 1A. The vehicle <NUM> includes a cab <NUM> with a window assembly <NUM>, here belonging to a lateral door <NUM>. The window assembly <NUM> comprises a frame <NUM>, a mobile window <NUM> and a fixed window <NUM>. The door <NUM> may be used by a driver and/or a passenger to enter and exit the cab <NUM>. The windows <NUM> and <NUM> are transparent so that the driver and/or passenger positioned in the cab <NUM> may see the surroundings outside of the vehicle <NUM> through the windows <NUM> and <NUM>.

The vehicle <NUM> is here embodied as a truck, i.e. a heavy-duty ground vehicle. However, the vehicle <NUM> could be another heavy-duty ground vehicle, such as a coach, a bus or a van. The vehicle <NUM> could even be another type of vehicle that would require a window assembly such as the window assembly <NUM>, including the mobile window <NUM>.

As shown in <FIG>, the window assembly <NUM> belongs to the door <NUM>. In other embodiments, instead of belonging to the door <NUM>, the window assembly <NUM> could belong to a fixed part of a body of the vehicle, belonging to the cab <NUM>.

The door <NUM>, including the window assembly <NUM>, are shown in greater detail in the main view of <FIG>.

The window assembly <NUM> comprises the frame <NUM>, the mobile window <NUM>, the fixed window <NUM>, a first drive <NUM>, a second drive <NUM>, a first transmission mechanism <NUM> and a second transmission mechanism <NUM>.

The window assembly <NUM> defines a longitudinal direction Z5 and a transversal direction X5, preferably perpendicular to one another, and fixed relative to the frame <NUM>. In use, the longitudinal direction Z5 is preferably oriented upwards, and the transversal direction X5 is preferably oriented substantially horizontally, such as, along the direction of travel of the vehicle <NUM>.

The frame <NUM> comprises longitudinal pillars <NUM>, <NUM>, <NUM> and <NUM>, oriented substantially in the longitudinal direction Z5, and transversal beams <NUM>, <NUM> and <NUM>, oriented substantially in the transversal direction X5. One or more of the pillars <NUM>, <NUM>, <NUM> and <NUM> and beams <NUM>, <NUM> and <NUM> may be obliquely oriented relative to the directions Z5 and X5, such as, in <FIG>, the pillar <NUM>. At a first ends thereof, the pillars <NUM> and <NUM> are connected by the beam <NUM>. At a second end thereof, the pillars <NUM> and <NUM> are connected by the beam <NUM>. At a first ends thereof, the pillars <NUM> and <NUM> are connected by the beam <NUM>. At a second end thereof, the pillars <NUM> and <NUM> are connected by the beam <NUM>. The second end of the pillar <NUM> is connected to the first end of the pillar <NUM>, at a first junction with the beam <NUM>. The second end of the pillar <NUM> is connected to the first end of the pillar <NUM>, at a second junction with the beam <NUM>.

The fixed window <NUM> is oriented parallel to directions X5 and Z5. The fixed window <NUM> is fixedly attached to the frame <NUM>. The fixed window <NUM> is received between the pillars <NUM> and <NUM> and the beams <NUM> and <NUM>.

The mobile window <NUM> is oriented parallel to directions X5 and Z5, i.e. parallel to the fixed window <NUM>. The mobile window <NUM> has a first longitudinal edge <NUM>, a second longitudinal edge <NUM>, a first transversal edge <NUM> and a second transversal edge <NUM>. The edges <NUM>, <NUM>, <NUM> and <NUM> delineate the window <NUM>. The longitudinal edges <NUM> and <NUM> are opposite and oriented substantially parallel to direction Z5. The transversal edges <NUM> and <NUM> are opposite and oriented substantially parallel to direction X5. The edge <NUM> connects the edges <NUM> and <NUM> and the edge <NUM> connects the edges <NUM> and <NUM>.

The mobile window <NUM> is mobile relative to the frame <NUM>, by sliding between a closed position shown in <FIG>, <FIG> and <FIG> and an open position shown in <FIG>. When sliding from the closed position to the open position, the window <NUM> is moved in the longitudinal direction Z5, i.e. preferably upwards. When sliding from the open position to the closed position, the window is moved opposite to the longitudinal direction Z5, i.e. preferably downwards. Between the open and closed position, the window <NUM> reaches an intermediate position shown in <FIG>.

As visible in <FIG>, <FIG> and <FIG>, when in the closed position, the mobile window <NUM> is positioned between the beams <NUM> and <NUM> and between the pillars <NUM> and <NUM>. When in the closed position, the mobile window <NUM> is positioned passed the fixed window <NUM> i.e. is positioned in the direction Z5 relative to the fixed window <NUM>. When in the closed position, the mobile window <NUM> closes an opening of the frame <NUM> delineated by the beams <NUM> and <NUM> and by the pillars <NUM> and <NUM>. In this configuration, a driver and/or a passenger positioned in the cab <NUM> may see the surroundings outside of the vehicle <NUM> respectively through each window <NUM> and <NUM>.

As visible in <FIG>, when in the open position, the mobile window <NUM> is positioned between the beams <NUM> and <NUM> and between the pillars <NUM> and <NUM>. When in the open position, the mobile window <NUM> is superposed with the fixed window <NUM>. Thus, a driver and/or a passenger positioned in the cab <NUM> may see the surroundings outside of the vehicle <NUM> through the superposed windows <NUM> and <NUM>. When in the open position, the mobile window <NUM> leaves open the opening of the frame <NUM> delineated by the beams <NUM> and <NUM> and by the pillars <NUM> and <NUM>. In this configuration, a driver and/or a passenger positioned in the cab <NUM> may also see the surroundings outside of the vehicle <NUM> through the opening of the frame <NUM> left open by the window <NUM>.

The first drive <NUM> is contained inside the first transmission mechanism <NUM>. The first drive <NUM> and transmission mechanism <NUM> are contained in the pillar <NUM>. As best visible in <FIG>, the first drive <NUM> comprises a first rotor <NUM>, a first stator <NUM>, a first attachment <NUM>, a second attachment <NUM>, a first longitudinal end <NUM> and a second longitudinal end <NUM>. The first drive <NUM> defines a first longitudinal axis Z8, parallel to the longitudinal direction Z5 and fixed relative to the stator <NUM> and the frame <NUM>.

The longitudinal end <NUM> is positioned at the beam <NUM> and the longitudinal end <NUM> is positioned at the beam <NUM>.

The first drive <NUM> may be an electric drive. The stator <NUM> has an elongated shape along the axis Z8, and extends from the end <NUM> to the end <NUM>. The stator <NUM> is fixed relative to the frame <NUM>, and is attached to the frame <NUM> at the first end <NUM>, by the first attachment <NUM>, and at the second end <NUM>, by the second attachment <NUM>. The first attachment <NUM> connects the stator <NUM> to a junction between the beam <NUM> and the pillar <NUM>. The second attachment <NUM> connects the stator <NUM> to a junction between the beam <NUM> and the pillar <NUM>.

The rotor <NUM> has a tubular shape centered on the axis Z8, and extends from the end <NUM> to the end <NUM>, between the attachments <NUM> and <NUM>. The stator <NUM> is received inside the rotor <NUM>, i.e. the rotor <NUM> is arranged around the stator <NUM>.

The rotor <NUM> rotates relative to the stator <NUM>, around the axis Z8, when the drive <NUM> is electrically powered. i.e. when the rotor <NUM> and/or the stator <NUM> are electrically powered. The rotor <NUM> and/or the stator <NUM> may include electromagnetic windings so that, when electrically powered, the rotor <NUM> is made to rotate relative to the stator <NUM>, i.e. relative to the frame <NUM>, by electromagnetic interaction between the rotor <NUM> and the stator <NUM>.

The sliding of the mobile window <NUM> is substantially parallel to the longitudinal axis Z8, since it is parallel to the longitudinal direction Z5. Since the stator <NUM> is fixed relative to the frame <NUM>, the window <NUM> slides relative to the stator <NUM>. As visible in <FIG>, in the open position of the window <NUM>, the window <NUM> is positioned along the drive <NUM>, i.e. the transversal edge <NUM> of the window <NUM> is positioned at the end <NUM> of the drive <NUM>, the transversal edge <NUM> is positioned at the end <NUM> of the drive <NUM>, the longitudinal edge <NUM> is positioned along the drive <NUM>, and the longitudinal edge <NUM> is positioned opposite to the drive <NUM>. As visible in <FIG>, <FIG> and <FIG>, in the closed position, the window <NUM> is positioned passed the drive <NUM> in the direction Z5, i.e. the transversal edge <NUM> of the window <NUM> is positioned passed the end <NUM> in the direction Z5, the transversal edge <NUM> is positioned at the end <NUM> of the drive <NUM> and the longitudinal edge <NUM> is positioned passed the drive <NUM> in the direction Z5.

Since the fixed window <NUM> is fixed relative to the frame <NUM>, it is also fixed relative to the stator <NUM>. The fixed window <NUM> is positioned along the first drive <NUM>.

The mobile window <NUM> is driven between the open position and the closed position by the rotation of the rotor <NUM>, via the first transmission mechanism <NUM>. To this end, the transmission mechanism <NUM> preferably comprises a lead screw <NUM>, a nut <NUM>, a slider <NUM> and a sliding guide <NUM>.

The lead screw <NUM> is centered on the axis Z8 and is arranged around the rotor <NUM>, i.e. the rotor <NUM> is received inside the lead screw <NUM>. The lead screw <NUM> is secured to the rotor <NUM>, so that the lead screw <NUM> and the rotor <NUM> rotate together around the axis Z8 relative to the stator <NUM>, when the drive <NUM> is powered. The lead screw <NUM> extends from the end <NUM> to the end <NUM> of the drive <NUM>. The lead screw <NUM> is threaded outwardly.

The nut <NUM> is secured to the slider <NUM>. The slider <NUM> is secured to the mobile window <NUM>, so that the nut <NUM> is secured to the mobile window <NUM> via the slider <NUM>. The nut <NUM> is geared with the lead screw <NUM> so that the slider <NUM> and the nut <NUM> are moved in translation along the axis Z8, between the ends <NUM> and <NUM>, under rotation of the lead screw <NUM> caused by rotation of the rotor <NUM>.

The sliding guide <NUM> is tubular shaped, centered on axis Z8 and extending from the end <NUM> to the end <NUM>. The sliding guide <NUM> is fixedly attached to the frame <NUM> by the attachments <NUM> and <NUM>, to be fixed relative to the frame <NUM> and the stator <NUM>. The sliding guide <NUM> is arranged around the lead screw <NUM>, thus enclosing the lead screw <NUM> and the rotor <NUM> and stator <NUM> contained therein. The sliding guide <NUM> comprises a longitudinal slot, extending from the end <NUM> to the end <NUM>. The guide <NUM> receives the slider <NUM>, which crosses said slot radially relative to the axis Z8. The slider <NUM>, being received in the slot of the guide <NUM>, is guided by the guide <NUM> along the axis Z8. Thus, the slider <NUM> and the nut <NUM> are prevented from rotating around the axis Z8. Thanks to this arrangement, the sliding of the window <NUM> is guided by the slider <NUM> and guide <NUM>, and driven by the drive <NUM> through the lead screw <NUM> and nut <NUM>.

The second drive <NUM> and transmission mechanism <NUM> may be, overall, similar to the first drive <NUM> and transmission mechanism <NUM>, and positioned at an opposite side of the window assembly <NUM>.

The second drive <NUM> is contained inside the second transmission mechanism <NUM>. The second drive <NUM> and transmission mechanism <NUM> are contained in the pillar <NUM>, opposite to the pillar <NUM> containing the first drive <NUM> and first transmission mechanism <NUM>. As best visible in <FIG>, the second drive <NUM> comprises a second rotor <NUM>, a second stator <NUM>, a first attachment <NUM>, a second attachment <NUM>, a first longitudinal end <NUM> and a second longitudinal end <NUM>. The second drive <NUM> defines a second longitudinal axis Z9, parallel to the longitudinal direction Z5 and fixed relative to the stator <NUM> and the frame <NUM>.

The longitudinal end <NUM> is positioned at the beam <NUM> and the longitudinal end <NUM> is positioned at the beam <NUM>. The fixed window <NUM> is positioned along the second drive <NUM>, i.e. between the drives <NUM> and <NUM>.

The second drive <NUM> may be an electric drive. The stator <NUM> has an elongated shape along the axis Z9, and extends from the end <NUM> to the end <NUM>. The stator <NUM> is fixed relative to the frame <NUM>, and is attached to the frame <NUM> at the first end <NUM>, by the first attachment <NUM>, and at the second end <NUM>, by the second attachment <NUM>. The first attachment <NUM> connects the stator <NUM> to a junction between the beam <NUM> and the pillar <NUM>. The second attachment <NUM> connects the stator <NUM> to a junction between the beam <NUM> and the pillar <NUM>.

The rotor <NUM> has a tubular shape centered on the axis Z9, and extends from the end <NUM> to the end <NUM>, between the attachments <NUM> and <NUM>. The stator <NUM> is received inside the rotor <NUM>, i.e. the rotor <NUM> is arranged around the stator <NUM>.

As visible in <FIG>, in the open position of the window <NUM>, the window <NUM> is positioned along the drive <NUM>, in particular between the drives <NUM> and <NUM>, i.e. the transversal edge <NUM> of the window <NUM> is positioned at the end <NUM> of the drive <NUM>, the transversal edge <NUM> is positioned at the end <NUM> of the drive <NUM>, the longitudinal edge <NUM> is positioned along the drive <NUM>, and the longitudinal edge <NUM> is positioned opposite to the drive <NUM>. As visible in <FIG> and <FIG>, in the closed position, the window <NUM> is positioned passed the drive <NUM> in the direction Z5, i.e. the transversal edge <NUM> of the window <NUM> is positioned passed the end <NUM> in the direction Z5, the transversal edge <NUM> is positioned at the end <NUM> of the drive <NUM> and the longitudinal edge <NUM> is positioned passed the drive <NUM> in the direction Z5.

The mobile window <NUM> is driven between the open position and the closed position by the rotation of the rotor <NUM>, via the second transmission mechanism <NUM>. To this end, the transmission mechanism <NUM> preferably comprises a lead screw <NUM>, a nut <NUM>, a slider <NUM> and a sliding guide <NUM>. Thus, the window <NUM> is driven under rotation of both rotors <NUM> and <NUM>.

The lead screw <NUM> is centered on the axis Z9 and is arranged around the rotor <NUM>, i.e. the rotor <NUM> is received inside the lead screw <NUM>. The lead screw <NUM> is secured to the rotor <NUM>, so that the lead screw <NUM> and the rotor <NUM> rotate together around the axis Z9 relative to the stator <NUM>, when the drive <NUM> is powered. The lead screw <NUM> extends from the end <NUM> to the end <NUM> of the drive <NUM>. The lead screw <NUM> is threaded outwardly.

The nut <NUM> is secured to the slider <NUM>. The slider <NUM> is secured to the mobile window <NUM>, so that the nut <NUM> is secured to the mobile window <NUM> via the slider <NUM>. The nut <NUM> is geared with the lead screw <NUM> so that the slider <NUM> and the nut <NUM> are moved in translation along the axis Z9, between the ends <NUM> and <NUM>, under rotation of the lead screw <NUM> caused by rotation of the rotor <NUM>.

The sliding guide <NUM> is tubular shaped, centered on axis Z9 and extending from the end <NUM> to the end <NUM>. The sliding guide <NUM> is fixedly attached to the frame <NUM> by the attachments <NUM> and <NUM>, to be fixed relative to the frame <NUM> and the stator <NUM>. The sliding guide <NUM> is arranged around the lead screw <NUM>, thus enclosing the lead screw <NUM> and the rotor <NUM> and stator <NUM> contained therein. The sliding guide <NUM> comprises a longitudinal slot, extending from the end <NUM> to the end <NUM>. The guide <NUM> receives the slider <NUM>, which crosses said slot radially relative to the axis Z9. The slider <NUM>, being received in the slot of the guide <NUM>, is guided by the guide <NUM> along the axis Z9. Thus, the slider <NUM> and the nut <NUM> are prevented from rotating around the axis Z9. Thanks to this arrangement, the sliding of the window <NUM> is guided by both sliders <NUM> and <NUM>, and driven by both drives <NUM> and <NUM>, through the lead screws <NUM> and <NUM> and nuts <NUM> and <NUM>.

In an alternative embodiment, the second drive <NUM>, the nut <NUM> and the lead screw <NUM> are omitted, so that the window <NUM> is driven solely by the drive <NUM> via the transmission mechanism <NUM>, and guided by the transmission mechanism <NUM> and the slider <NUM> and sliding guide <NUM>.

In an alternative embodiment, a second mobile window, or another feature than a window, may be provided instead of the fixed window <NUM>, taking advantage of the space available between the drives <NUM> and <NUM> if the two drives are implemented, or along the drive <NUM> if only drive <NUM> is implemented.

Claim 1:
A window assembly (<NUM>) for a vehicle (<NUM>), the window assembly (<NUM>) comprising:
- a first drive (<NUM>), comprising a first stator (<NUM>) and a first rotor (<NUM>), the first rotor (<NUM>) being arranged around the first stator (<NUM>) for rotating relative to the first stator (<NUM>), about a first longitudinal axis (Z8) fixed relative to the first stator (<NUM>), when the first drive (<NUM>) is electrically powered;
- a mobile window (<NUM>), having a transversal edge (<NUM>) and a first longitudinal edge (<NUM>), the mobile window (<NUM>) being configured for sliding relative to the first stator (<NUM>) substantially parallel to the first longitudinal axis (Z8), between an open position where the transversal edge (<NUM>) is positioned at a first longitudinal end (<NUM>) of the first drive (<NUM>) and the first longitudinal edge (<NUM>) is positioned along the first drive (<NUM>), and a closed position where the transversal edge (<NUM>) is positioned at a second longitudinal end (<NUM>) of the first drive (<NUM>) and where the first longitudinal edge (<NUM>) is positioned passed the first drive (<NUM>) along the first longitudinal axis (Z8); and
- a first transmission mechanism (<NUM>), the mobile window (<NUM>) being driven between the open position and the closed position by the rotation of the first rotor (<NUM>), via the first transmission mechanism (<NUM>),
wherein the first transmission mechanism (<NUM>) comprises:
- a lead screw (<NUM>), arranged around the first rotor (<NUM>) and secured to the first rotor (<NUM>); and
- a nut (<NUM>), secured to the mobile window (<NUM>) and geared with the lead screw (<NUM>).