Actuatable hatch for a vessel, vessel comprising such a hatch, and kit of parts for forming such a hatch

Abstract

The present invention is related to an actuatable hatch for a vessel, the hatch comprising a hatch body configured to be rotatably coupled around a rotational axis to a vessel at a primary side, at least one load transfer structure at least partially arranged in at least one coupling area, and at least one actuating mechanism for actuating the hatch between a closed and an opened position. The actuating mechanism comprises at least one hinge shaft at least partially carried by or suspended in the load transfer structure, and at least one rotary actuator accommodated within the hatch body, wherein an output shaft of said rotary actuator is connected to the at least one hinge shaft. The invention is also related to a vessel comprising such a hatch and a kit of parts for forming such a hatch.

Description

[0001] The present invention relates to an actuatable hatch for a vessel, in particular a hatch comprising an internal rotary actuating mechanism. The invention also relates to a vessel comprising such a hatch. The invention further relates to a kit of parts for forming such a hatch.

[0002] Actuatable hatches are commonly used on vessels, in particular on luxury yachts, for many reasons. A hatch may for example be used to provide access to interior spaces of a vessel or to create additional external areas such as decking. Yet, a hatch may also be used to provide a temporary recreational facility such as a sports field. Yet, the most frequent usage of a hatch on a vessel is for application on a port side or starboard side of the vessel, yet sometimes a hatch is provided on a stern side of the vessel. Conventional hatch systems typically employ hydraulic or electric cylinders connected to a lever which connects to the main pivot shaft of the hatch to transform linear motion of the cylinder into rotational motion of the hatch. Such a cylinder and transmission in the form of a lever allow the hatch to be moved between closed and open positions.

[0003] However, these conventional actuating systems have several drawbacks. For hatches on a stern side of the ship, but also when deployed on other parts of the vessel, the drive cylinders are usually located on the sides of the hatch and protrude into the vessel's (interior) spaces. This takes up valuable interior space that could otherwise be used for living areas. Yet, the drive cylinders may also be located in the interior space of the vessel itself, creating significant challenges for interior design to hide or camouflage the actuating mechanism. Especially for the luxury yacht industry, where both the available space itself as well as the possibilities in camouflaging technical components is very important. Additionally, the required space for actuating the hatch on the sides of the hatch limit the maximum width of the hatch.

[0004] Additionally, conventional systems are generally limited to an actuation angle of approximately 110 degrees due to geometric constraints of the lever design. For hatches requiring larger opening angles, dual cylinder and lever designs may be used, but these require even more space inside the vessel and have increased hydraulic requirements. These existing hatches thus require significant spacing on either side of the hatch body, with a typical width requirement of 1,5 meters on either side of the hatch to allow for installation and maintenance of the drive components. Also, the platform hinge line protrudes into the vessel on both sides to allow for the hinge shaft passage. There remains a need for more compact and space-efficient actuating mechanisms for vessel hatches.

[0005] Another problem with conventional hatch systems is that they often require precise alignment between the hatch and the vessel structure during installation. This can be challenging and time-consuming, especially for large hatches. Misalignment can lead to improper operation or premature wear of components. Current solutions typically involve extensive on-site adjustments or custom fabrication, which increases installation time and cost. Furthermore, routing power and control connections to conventional hatch actuating systems often requires additional openings or penetrations in the vessel hull. This increases the risk of water ingress and complicates the watertight integrity of the vessel. Existing solutions like e-chains for cable routing tend to be vulnerable to harsh marine environments.

[0006] It is therefore a first object of the present invention to provide an improved actuatable hatch for a vessel that allows for an improved usable space and / or access.

[0007] It is a second object of the present invention to provide an improved actuatable hatch with a more compact actuating mechanism, preferably that can be housed substantially within the hatch body itself.

[0008] It is a third object of the present invention to provide an improved actuatable hatch with an installation system that allows for easier alignment and adjustment between the hatch and vessel structure.

[0009] It is a fourth object of the present invention to provide an improved actuatable hatch with a more robust and integrated system for routing power and control connections while maintaining watertight integrity.

[0010] The present invention thereto proposes an actuatable hatch for a vessel, the hatch comprising: A hatch body, said hatch body configured to be rotatably coupled around a rotational axis to a vessel at a primary side, wherein the primary side comprises at least one coupling area for coupling the hatch to a part of the vessel, optionally, at least one load transfer structure, at least partially arranged in at least one coupling area, wherein a part of said load transfer structure is configured to be coupled, preferably rigidly, to a part of a vessel, at least one actuating mechanism for actuating the hatch between a closed and an opened position, said actuating mechanism comprising; o At least one hinge shaft, wherein said hinge shaft is at least partially carried by or suspended in the load transfer structure; o At least one actuator, preferably a rotary actuator, accommodated within the hatch body, wherein an output shaft of said actuator, preferably the rotary actuator, is connected to the at least one hinge shaft, wherein at least one of the hinge shaft or output shaft or the rotary actuator is connected to a part of the hatch body.

[0011] This configuration offers several benefits. By accommodating the actuator within the hatch body, the design minimizes intrusion of the actuating mechanism into the vessel's interior spaces. This allows for an improved utilization of the interior vessel space. The way the hatch according to the invention is able to be coupled to the vessel, i.e., via the primary side, entirely resolves the need for having an actuating mechanism besides the hatch body, in the vessels space. When the hatch is for example allocated at a stern side, the hatch may stretch over a larger percentage of the width of the vessel compared to the conventional hatches. Particularly the need for side pillars is less stringent, as no mechanical components need to be hidden from sight as the actuators are inside the hatch. Furthermore, by integrating the actuating mechanism within the hatch body and potentially using a single shaft for both the hinge and actuator output, the design reduces the need for additional openings or penetrations in the vessel hull. This contributes to maintaining the watertight integrity of the vessel, addressing the fourth object of the invention.

[0012] Preferably, the entire actuating mechanism is situated within the maximum outer dimensions of the hatch body, in particular within the hatch body as such.

[0013] The compact rotary actuator, potentially combined with the hinge shaft, results in a more space-efficient actuating mechanism. Since the rotary actuator, and / or hinge shaft, and / or optionally a part of the load transfer structure is accommodated within the hatch body, there is a more compact actuation, rendering that substantially the entire actuating mechanism is housed within the hatch body. It is imaginable that the entire load transfer structure and / or actuating mechanism are accommodated in the hatch body and / or the coupling area. By fixating one of the hinge shaft or output shaft or the rotary actuator to a part of the hatch body it is possible to transfer the torque and to realize a rotation of the hatch body.

[0014] The optional load transfer structure may form part of the hatch, however it may also be mounted to the vessel first. If the hatch is provided without the presence of the load transfer structure, such as in the case where the load transfer structure forms part of the vessel, the hinge shaft is carried or suspended by a part of the vessel, in particular the load transfer structure. The hinge shaft may be placed in the load transfer structure to couple the hatch to the vessel. The load transfer structure essentially transfers all forces towards the vessel. The load transfer structure is configured to bear all loads imposed by the hatch, such as shear forces due to the weight of the hatch, loading and stop forces, and the torque forces induced by the actuating mechanism for rotating the hatch around its rotational axis. The load transfer structure allows for a simplified installation to a vessel, reducing the need for complicated alignment procedures of axes, since the load transfer structure carries the hinge shaft. The actuatable hatch according to the invention may be a platform, allowing for easier access into the water, or for other recreational purposes. The hatch may however also be referred to as an item, a hull door. In the context of this publication, "vessel" primarily refers to a watercraft or ship, particularly a yacht, but the specific type and size of the vessel may vary depending on the particular application of the hatch system described.

[0015] At least one load transfer structure is at least partially arranged in the coupling area of the primary side of the hatch body. Such a coupling area may be situated within the maximum outer dimensions of the hatch body. Hence, the coupling area does preferably not protrude with respect to the hatch body. As a result, also part of the load transfer structure is situated within these maximum outer dimensions, causing for compact packaging of the whole and further reducing the need for interior space of the vessel for equipment. It is not necessary for the coupling area to be inside the hatch body, however it is conceivable that in some embodiments the coupling area is also arranged within the hatch body. Part of the load transfer structure shall protrude with respect to aforementioned maximum outer dimensions, for allowing coupling of the load transfer structure to the vessel without the hatch body touching the vessel. At least one coupling area is formed by a recess arranged in the primary side of the hatch body. The recess can accommodate components of the hatch, such as a portion of the load transfer structure or parts of the actuating system, such as the hinge axis and / or part of the output shaft, without protruding beyond the main profile of the hatch body. Furthermore, this configuration can contribute to more efficient space utilization. By incorporating the coupling area into the hatch body itself, it minimizes the need for additional external structures or protrusions. The recessed coupling area may also facilitate better sealing solutions. The defined boundaries of the recess can provide clear interfaces for seals, potentially improving the watertightness of the hatch when closed. This is particularly important in marine applications where preventing water ingress is crucial. It is imaginable that the recess forming the coupling area is at least partially defined by the hatch body.

[0016] The hatch may comprise at least two mutually spaced apart load transfer structures, arranged at least partially in at least one coupling area, wherein each load transfer structure is configured to be coupled, preferably rigidly, to a part of a vessel. Preferably, each load transfer structure is coupled to its individual actuating mechanism. The pair of actuating mechanisms in particular the actuators, are mutually aligned to form a single axis. The implementation of multiple load transfer structures offers several advantages. Firstly, it provides enhanced structural stability to the hatch. By distributing the load across multiple connections to the vessel, the hatch can better withstand the forces exerted during operation, including the weight of the hatch itself and any additional loads that may be placed on it when in use. Furthermore, the spaced apart arrangement of the load transfer structures can provide better resistance to torsional forces. When the hatch is operated, it may be subjected to twisting forces. Such twisting forces may also occur when for example a tender boat is moored to the platform, for example on one end thereof. Multiple load transfer structures help to counteract these forces, maintaining the hatch's stability and smooth operation over time. Additionally, having multiple load transfer structures may allow for a more even distribution of the actuating forces. This can potentially reduce wear on individual components, extending the operational life of the hatch mechanism. In cases where the hatch is particularly large or heavy, the use of multiple load transfer structures becomes especially beneficial. It allows for the implementation of multiple actuating mechanisms if needed, each associated with a separate load transfer structure, providing increased power and control for larger hatch assemblies. Especially within the luxury yacht industry, where such hatches may have a width up to 5, 10, or even 15 or 20 meters. Yet, in principle the concept may be scaled according to the size and shape of the vessel.

[0017] At least one load transfer structure may comprise: a mounting base, wherein said mounting base comprises a mounting surface configured to be connected, directly or indirectly, to a part of the vessel; at least one shaft support, positioned at a distance from the mounting surface of the mounting base, wherein the shaft support is configured to accommodate at least a part of at least one hinge shaft.

[0018] This configuration offers several significant benefits. Firstly, the mounting base provides for a simplified attachment to the vessel. The mounting surface allows for secure and precise connection to the vessel structure, ensuring proper alignment and load distribution. The option for direct or indirect connection offers flexibility in installation, accommodating various vessel designs and construction methods. When the load transfer structure is coupled to the vessel before installation of the hatch, it may in particular be the mounting base of the load transfer structure which is coupled before coupling the hatch. This allows for easier placement as no hatch is arranged which can hinder the accessibility. The shaft support, positioned at a distance from the mounting surface, creates a spatial separation between the vessel attachment point and the hinge shaft. This separation is advantageous as it allows for proper positioning of the rotational axis of the hatch. Depending on the design of the hatch body, the distance between shaft support and mounting surface can be increased or decreased. By configuring the shaft support to accommodate at least a part of the hinge shaft, this design enables precise control over the position of the hatch's rotational axis. This arrangement can enhance the smoothness of the hatch's operation and ensure consistent performance over time. The shaft support can be designed to provide optimal bearing surfaces for the hinge shaft, potentially reducing wear and extending the operational life of the hatch mechanism. This design also contributes to the overall compactness of the hatch mechanism. By integrating the shaft support into the load transfer structure, it eliminates the need for separate, bulky support structures, aligning with the goal of minimizing intrusion into the vessel's interior spaces. More importantly, the shaft support is rigidly connected to the mounting base. The shaft support being in the rotational axis provides a significant advantage. That is, the torque forces may be substantially reduced, as the shaft support is rigidly coupled to the mounting surface, requiring no moving components which need to handle the torque. This configuration can enhance the structural integrity of the entire hatch assembly. The load transfer structure, with its mounting base and shaft support, forms a rigid framework that can effectively distribute forces between the vessel, the hinge shaft, and the hatch body. When more than one load transfer structure is provided, it is preferred that the shaft supports of each are mutually aligned such that the rotational axis of the hatch body is properly situated. The shaft support is preferably situated within the maximum dimensions of the hatch body.

[0019] At least one shaft support may comprise a shaft support base portion and a shaft support cap portion, mutually enclosing at least a part of the hinge shaft, wherein the shaft support base portion is rigidly connected to the mounting base, and wherein said shaft support cap portion is releasably connectable to the shaft support base. The split design of the shaft support, with separate base and cap portions, allows for easier installation and maintenance of the hinge shaft. The hinge shaft can be placed into the base portion and then secured by attaching the cap portion, simplifying assembly and potential future replacements. It also is especially beneficial in case the load transfer structure is initially attached to the vessel, allowing to keep the cap unattached. The hinge shaft of the hatch may be slowly lowered int the shaft support base portion which simplifies the installation. Especially since it allows for alignment of the load transfer structures prior to installing the entire hatch, eliminating the need to carry the weight of the hatch body during this alignment. The shaft support base portion and the shaft cap portion may be mutually bolted together. Yet, alignment may also be performed whilst the hatch is coupled to the load transfer structure. The weight of the hatch may affect the exact preferred position of the load transfer structure to the vessel.

[0020] Each actuating mechanism may comprise a pair of actuators, preferably rotary actuators, each accommodated within the hatch body, wherein an output shaft of each actuator is connected to the at least one hinge shaft of the actuating mechanism. This allows for a better force distribution, as the torque for rotating the hatch body is applied or transferred symmetrically via the load transfer structure by the actuators. They may reduce the wear and tear. In addition to a more even application of the load, it allows for increased torque application and lifting capacity. It is also conceivable that the output shaft of each of the rotary actuators preferably coincides with the rotational axis of the hinge shaft. The actuators are optionally mutually aligned to form a single axis. Said hinge shaft and output shaft, when forming coinciding axes, may be formed by a single shaft. The output shaft of at least one rotary actuator, preferably each, and at least one hinge shaft are concentrically connected such that their axes coincide. Optionally, the rotational axis of the hatch body and the rotational axis of the hinge shaft preferably coincide. This allows to eliminate the issue of introducing a momentum during rotation of the hatch body. Moreover, this provides for a more compact integration which is beneficial, especially on yachts.

[0021] At least one rotary actuator, in particular the body or housing of the actuator, may be coupled to the hatch body, and wherein the output shaft and hinge shaft and load transfer structure are mutually fixedly connected.

[0022] The fixed mutual connection between the output shaft, hinge shaft, and load transfer structure creates a robust mechanical linkage. This linkage efficiently transfers the rotational force from the actuator to the hinge shaft and ultimately to the load transfer structure. The load transfer structure, being coupled to the vessel, then facilitates the transfer of forces into the vessel's structure. Due to the actuator being connected to the hatch body, actuation of the actuator causes the actuator to move, whilst the output shaft (and therefore the hinge shaft and load transfer structure) stay in place. This rigid assembly of output shaft, hinges shaft, and load transfer structure enhances the structural integrity of the entire hatch mechanism, allowing it to withstand the forces and stresses encountered during operation more effectively. The fixed connection also simplifies the load path from the actuator to the hatch body. Forces generated by the actuator are transmitted directly through the output shaft, hinge shaft, and load transfer structure to the hatch body, ensuring efficient transfer of rotational force and minimizing energy loss. Since no large levers are applied on the output shaft, and since the actuator is directly coupled to the hatch body, the losses of torque load on the actuator are reduced to a minimum. Contrary to normal use of an actuator, wherein the output shaft is used for driving parts of a mechanism, some embodiments of the present invention have shown that fixating the output shaft, and allowing the body or housing of the actuator to move is more efficient due to more balanced loads. It was found that the solution presented significantly reduces the radial loading on the actuator.

[0023] At least one rotary actuator may be coupled to a part of the hatch body which extends in a plane substantially perpendicular to the hinge shaft and / or output shaft. The parts, in case each actuator is coupled to the hatch body, of the hatch body onto which the actuators are mounted enclose a part of the load transfer structure. Hence the load transfer structure and actuator may be situated at either ends of the part of the hatch body, but still within the maximum dimension of the hatch body. The output shaft may be fixedly connected to the hinge shaft via one or more shear keys, and wherein the hinge shaft is fixedly connected to the load transfer structure, in particular the shaft support, via one or more shear keys. Although shear keys are preferred, it is conceivable that the connection can be achieved via spline shafts or clamped connections. It is thinkable that the connection, for example formed by the shear keys, is at least partially enclosed by the shaft support base portion and / or the shaft support cap portion.

[0024] At least one rotary actuator is coupled to the hatch body via at least one bearing structure comprising one or more bearings arranged between said bearing structure and the hinge shaft and / or hatch body. The bearing structure to separate the load paths for shear forces due to the item mass, and torque generated by the rotary actuators. This separation of load paths is beneficial for optimizing the performance and longevity of the hatch mechanism. This separation of load paths also allows for the actuators to exert maximum torque whilst not bearing any radial loading on the actuator. This enables the present invention for an even more compact design. This is beneficial as sometimes the available space within the hatch body is limited. By incorporating a bearing structure between the rotary actuator and the hatch body, the design effectively isolates the actuator from direct shear forces caused by the weight of the hatch. This isolation helps protect the actuator from excessive wear and potential damage, thereby extending its operational life.

[0025] At least one rotary actuator is a hydraulic rotary actuator. The hydraulic actuator has a relatively high torque to diameter ratio, meaning that the hydraulic type of actuator can generate substantial torque with minimal diameters, which is beneficial for compact packaging. Alternatively, it is imaginable to provide for an electric motor, optionally in combination with a planetary gearbox. However, this requires a larger internal volume to be available for installation. Additionally, the electric motors in combination with planetary gearbox have limited backup options and require a complex electrical system compared to the hydraulic counterparts.

[0026] The hatch may further comprise: at least one power supply structure for supply of at least an actuating power from a vessel to the actuating mechanism, in particular to at least one rotary actuator, wherein a first part of the power supply structure is connected or connectable to the hatch body, in particular in a coupling area, and wherein a second part of the power supply structure is connectable to a part of the vessel.

[0027] The power supply structure may provide for an easy supply of power, such as hydraulic or electric power, to the actuator. Yet, the power supply structure may additionally or alternatively be used for supply of other amenities such as electricity, water, gas, and the like. Water may for example be used when a shower is installed in the hatch, the electricity may be used for lighting. The power supply preferably connects to an internal portion of the hatch body, to supply said power or amenities to the interior volume of the hatch. The first part of the power supply structure is configured for providing access to an interior volume of the hatch body. This configuration offers several advantages. It allows for efficient routing of power lines and other necessary connections directly into the hatch body, minimizing external protrusions and maintaining a streamlined design. The second part of the power supply structure is connected or connectable to the vessel, in particular the power system of the vessel. At least one power supply structure is arranged partially, optionally substantially entirely, within a coupling area. It is beneficial to provide the power supply in a coupling area, since it further eliminates the need for space on either side of the hatch. The coupling area in which the power supply structure is arranged is situated substantially centrally on the primary side of the hatch body. This allows to provide a single power supply structure which centrally provides access to two halves of the hatch body interior volume. The central arrangement may terminate the inside hinge line.

[0028] The first part of the power supply structure is at least partially formed by at least one hollow axial connection, wherein an axis along which the hollow axial connection extends substantially coincides with the rotational axis of the hatch body. Both ends of the hollow axial connection may connect to the hatch body, in particular to a part of the coupling area, which may be bounded by the hatch body. It is preferred that the axis of the axial connection coincides with the rotational axis of the hatch body, preferably also with the hinge shaft and output shaft. The coincidence of these axes ensures that the power supply structure rotates along with the hatch body, or that the hatch body rotates around a more or less stationary supply structure, minimizing stress on the connections and reducing the risk of tangling or damage to power supply lines during operation. The first part of the power supply structure may be connected or connectable to the hatch body via at least one bearing structure, which bearing structure is essentially watertight. The bearing structure may be formed by a rotary seal and / or Roxtec component to ensure the watertightness, alternatively cable glands or hydraulic penetrations may be used to achieve such a result. Moreover, the bearings may provide some axial movement of the first part of the power supply, to reduce stresses. The second part may also be connectable to the vessel via a bearing structure, preferably one of similar type. Due to the preferred orthogonal nature of the axial and lateral connection the power supply will automatically align itself to suit the hatch position relative to the vessel, regardless of motion or position of either one.

[0029] The second part of the power supply structure may be at least partially formed by at least one hollow lateral connection, wherein a hollow interior of the axial connection and lateral connection are mutually connected, and wherein an end of the lateral connection facing away from the hollow axial connection is configured to be coupled to a vessel. The lateral connection extends from the hollow axial member in a direction away from the primary side towards a vessel. This lateral connection is oriented orthogonally with respect to the axial connection. This configuration allows for a natural separation between the rotating components of the hatch (associated with the axial connection) and the static components of the vessel (connected to the lateral connection). This can reduce wear and stress on the supply lines during hatch operation. The mutual connection between the hollow interiors of the axial and lateral connections creates a continuous pathway for power and other supplies. This can simplify the routing of cables, hydraulic lines, or other necessary connections. The mutual connection between the hollow interiors of the axial and lateral connections creates a continuous pathway for power and other supplies. This can simplify the routing of cables, hydraulic lines, or other necessary connections.

[0030] The hatch body may be provided with at least one stopping element, in particular a stopping surface, more preferably an integral surface of the hatch body, wherein said stopping element is arranged at the primary side of the hatch body, and configured to co-act with a part of the vessel, preferably to define a maximum rotational movement of the hatch body. The stopping element serves as a physical limit to the hatch's range of motion. By defining a maximum rotational movement, it prevents over-extension of the hatch, which could potentially damage the hatch mechanism or the vessel structure. The maximum rotational movement may be defined such that an upper surface of the hatch body is, when the hatch is opened, substantially flush with an interior deck of the vessel. Preferably horizontally oriented. The optional use of a resilient damping material, such as rubber, on the stopping element provides a cushioning effect when the hatch reaches its fully open position. This damping action reduces the impact force, minimizing wear and tear on both the hatch and the vessel components. The stopping element also limits the forces on the actuating mechanism since in the opened position the rotational forces are bounded by the stopping element. When the hatch is fully rotated, the hatch can rest on the part of the vessel via the stopping element.

[0031] At least the actuating mechanism, and preferably also at least a part of the load transfer structure, extends between approximately 100 mm to 500 mm beyond the rotational axis of the hatch, preferably between 100 mm and 400 mm. The specified extension range allows for a compact design while still providing sufficient space for the actuating mechanism and load transfer structure. This balance between compactness and functionality can be crucial in vessel design where space is often at a premium. This positioning may allow for efficient force transfer, potentially reducing the power requirements for opening and closing the hatch.

[0032] The present invention is further related to a vessel comprising: a vessel body comprising at least one opening, wherein said opening is preferably arranged on a stern side of the vessel body; at least one hatch, preferably a hatch according to the invention, wherein the hatch is rotatably connected to the vessel body via the load transfer structure, and configured to be moved between: o a closed position, in which the hatch substantially closes the opening in the vessel body; and o an opened position, in which the hatch is rotated around the rotational axis relative to the closed position for providing access to the opening.

[0033] With respect to the vessel according to the present invention the same benefits as explained with respect to the hatch apply mutatis mutandis. Particularly, the hatch according to the disclosure allows for an implementation of the hatch which does not require external space on either side of the hatch. This allows for larger hatches to be provided for as there is no technical space needed on the sides for allowing the hatch to be moved between the opened and the closed position. The technical space shall be understood as the space required for driving hatches according to the prior art, such as the cylindrical actuator to be arranged on either side of the hatch.

[0034] The vessel further comprises at least one foundation configured for receiving a part of the load transfer structure of the hatch. The foundation provides a robust and stable connection between the vessel and the hatch, in particular the load transfer structure thereof, ensuring proper load distribution and structural integrity. The connection, preferably the welded connection, to the vessel body offers a secure and permanent attachment, while the mounting interface on the opposite side allows for easier installation, removal, or adjustment of the hatch assembly. This design can accommodate manufacturing tolerances and facilitate alignment during installation. A first side of the foundation may be welded to the vessel body, and wherein another side of the foundation, preferably an opposing side, comprises mounting interface, wherein the load transfer structure is mounted to said mounting interface. The use of a dedicated foundation can also simplify the integration of the hatch into various vessel designs. It provides a standardized interface between the vessel structure and the hatch assembly, potentially reducing design complexity and installation time. Additionally, this configuration may allow for better isolation of the hatch loads from the main vessel structure, potentially reducing stress on the vessel body and improving overall structural performance.

[0035] Optionally, a space is enclosed between the mounting interface and the side of the load transfer structure connected to the mounting interface, wherein said space is at least partially filled by at least one filler, such as epoxy. Preferably, the filler is cured prior to fixating bolts between the load transfer structure and vessel. This configuration allows for precise adjustment and alignment of the load transfer structure with respect to the vessel and hence as such the hatch, compensating for manufacturing tolerances or slight misalignments. The filler material can provide additional structural support, distribute loads more evenly, and potentially dampen vibrations.

[0036] The foundation and / or the vessel further comprises at least one bump stop, wherein in the opened position of the hatch, at least a part of the hatch body, in particular a stopping element thereof, abuts against said bump stop. This feature defines and limits the maximum opening angle of the hatch, preventing over-extension and potential damage. The bump stop can be designed to absorb the impact of the hatch reaching its fully open position, reducing wear on the hinge mechanism and providing a more controlled and smooth operation.

[0037] The vessel may further comprise at least one further opening, arranged at a port side and / or starboard side of the vessel body, at least one further hatch, preferably according to the invention, wherein the further hatch is rotatably connected to the vessel body via the load transfer structure, and configured to be moved between a closed position, in which the hatch substantially closes the further opening in the vessel body; and an opened position, in which the hatch is rotated around the rotational axis relative to the closed position for providing access to the further opening. Since the hatch according to the present invention does not require technical space in the vessel on the side ends of the vessel, the further hatches may be positioned close to the first, e.g., on a stern side, hatch. This allows for a substantial design freedom which allows a more opened stern side of the vessel.

[0038] The present invention further relates to a kit of parts for forming a hatch for use in a vessel, comprising: at least one hatch body, in particular according to the invention, said hatch body configured to be rotatably coupled around a rotational axis to a vessel at a primary side, wherein the primary side comprises at least one coupling area for coupling the hatch to a part of the vessel; optionally, at least one load transfer structure, in particular according to the invention, wherein a part of said load transfer structure is configured to be coupled, preferably rigidly, to a part of a vessel; and at least one actuating mechanism, preferably according to the invention, the hatch mechanism comprising at least one hinge shaft and at least one rotary actuator, wherein an output shaft of said rotary actuator is connected to the at least one hinge shaft.

[0039] The same benefits apply with respect to the kit of parts as explained in respect of the actuatable hatch.

[0040] Preferred embodiments of the invention are illustrated by means of the non-limitative set of clauses presented below. 1. Actuatable hatch for a vessel, the hatch comprising: A hatch body, said hatch body configured to be rotatably coupled around a rotational axis to a vessel at a primary side, wherein the primary side comprises at least one coupling area for coupling the hatch to a part of the vessel, At least one load transfer structure, at least partially arranged in at least one coupling area, wherein a part of said load transfer structure is configured to be coupled, preferably rigidly, to a part of a vessel, At least one actuating mechanism for actuating the hatch between a closed and an opened position, said actuating mechanism comprising; o At least one hinge shaft, wherein said hinge shaft is at least partially carried by or suspended in the load transfer structure; o At least one rotary actuator, accommodated within the hatch body, wherein an output shaft of said rotary actuator is connected to the at least one hinge shaft, Wherein at least one of the hinge shaft or output shaft or the rotary actuator is connected to a part of the hatch body. 2. Hatch according to clause 1, wherein the hatch comprises at least two mutually spaced apart load transfer structures, arranged at least partially in at least one coupling area, wherein each load transfer structure is configured to be coupled, preferably rigidly, to a part of a vessel. 3. Hatch according to clause 1 or 2, wherein at least one load transfer structure comprises: a mounting base, wherein said mounting base comprises a mounting surface configured to be connected, directly or indirectly, to a part of the vessel; at least one shaft support, positioned at a distance from the mounting surface of the mounting base, wherein the shaft support is configured to accommodate at least a part of at least one hinge shaft. 4. Hatch according to clause 3, wherein at least one shaft support comprises a shaft support base portion and a shaft support cap portion, mutually enclosing at least a part of the hinge shaft, wherein the shaft support base portion is rigidly connected to the mounting base, and wherein said shaft support cap portion is releasably connectable to the shaft support base. 5. Hatch according to any of the preceding clauses, wherein each actuating mechanism comprises a pair of rotary actuators, each accommodated within the hatch body, wherein an output shaft of each actuator is connected to the at least one hinge shaft of the actuating mechanism. 6. Hatch according to any of the preceding clauses, wherein the output shaft of at least one rotary actuator and at least one hinge shaft are concentrically connected such that their axes coincide. 7. Hatch according to any of the preceding clauses, wherein at least one rotary actuator is coupled to the hatch body, and wherein the output shaft and hinge shaft and load transfer structure are mutually fixedly connected. 8. Hatch according to clause 7, wherein the output shaft is fixedly connected to the hinge shaft via one or more shear keys, and wherein the hinge shaft is fixedly connected to the load transfer structure, in particular the shaft support, via one or more shear keys and / or splines and / or clamps. 9. Hatch according to clause 7 or 8, wherein at least one rotary actuator is coupled to the hatch body via at least one bearing structure comprising one or more bearings arranged between said bearing structure and the hinge shaft and / or hatch body. 10. Hatch according to any of the clauses 7-9, wherein at least one rotary actuator is coupled to a part of the hatch body which extends substantially perpendicular to the hinge shaft and / or output shaft. 11. Hatch according to any of the preceding clauses, wherein at least one coupling area is formed by a recess arranged in the primary side of the hatch body 12. Hatch according to any of the preceding clauses, wherein at least one rotary actuator is a hydraulic rotary actuator. 13. Hatch according to any of the preceding clauses, the hatch further comprising: At least one power supply structure for supply of at least an actuating power from a vessel to the actuating mechanism, in particular to at least one rotary actuator, wherein a first part of the power supply structure is connected or connectable to the hatch body, in particular in a coupling area, and wherein a second part of the power supply structure is connectable to a part of the vessel. 14. Hatch according to clause 13, wherein the first part of the power supply structure is at least partially formed by at least one hollow axial connection, wherein an axis along which the hollow axial connection extends substantially coincides with the rotational axis of the hatch body. 15. Hatch according to clause 14, wherein the second part of the power supply structure is at least partially formed by at least one hollow lateral connection, wherein a hollow interior of the axial connection and lateral connection are mutually connected, and wherein an end of the lateral connection facing away from the hollow axial connection is configured to be coupled to a vessel. 16. Hatch according to any of the clauses 13-15, wherein the first part of the power supply structure is connected or connectable to the hatch body via at least one bearing structure, which bearing structure is essentially watertight. 17. Hatch according to any of the clauses 13-16, wherein at least one power supply structure is arranged partially, optionally substantially entirely, within a coupling area. 18. Hatch according to clause 17, wherein the coupling area in which the power supply structure is arranged is situated substantially centrally on the primary side of the hatch body. 19. Hatch according to any of the preceding clauses, wherein the hatch body is provided with at least one stopping element, in particular a stopping surface, wherein said stopping element is arranged at the primary side of the hatch body, and configured to co-act with a part of the vessel to define a maximum rotational movement of the hatch body. 20. Hatch according to any of the preceding clauses, wherein at least the actuating mechanism, and preferably also at least a part of the load transfer structure, extends between approximately 100 mm to 500 mm beyond the rotational axis of the hatch, preferably between 100 mm and 400 mm. 21. Vessel comprising: a vessel body comprising at least one opening, wherein said opening is preferably arranged on a stern side of the vessel body; at least one hatch according to any of the preceding clauses, wherein the hatch is rotatably connected to the vessel body via the load transfer structure, and configured to be moved between: o a closed position, in which the hatch substantially closes the opening in the vessel body; and o an opened position, in which the hatch is rotated around the rotational axis relative to the closed position for providing access to the opening. 22. Vessel according to clause 21, wherein the vessel further comprises at least one foundation configured for receiving a part of the load transfer structure of the hatch. 23. Vessel according to clause 22, wherein a first side of the foundation is coupled, preferably welded, to the vessel body, and wherein another side of the foundation, preferably an opposing side, comprises mounting interface, wherein the load transfer structure is mounted to said mounting interface. 24. Vessel according to clause 23, wherein a space is enclosed between the mounting interface and the side of the load transfer structure connected to the mounting interface, wherein said space is at least partially filled by at least one filler, such as epoxy. 25. Vessel according to any of the clauses 21-24, wherein the foundation and / or the vessel further comprises at least one bump stop, wherein in the opened position of the hatch, at least a part of the hatch body, in particular a stopping element thereof, abuts against said bump stop. 26. Vessel according to any of the clauses 21-25, further comprising: at least one further opening, arranged at a port side and / or starboard side of the vessel body; at least one further hatch according to any of the preceding clauses, wherein the further hatch is rotatably connected to the vessel body via the load transfer structure, and configured to be moved between: o a closed position, in which the hatch substantially closes the further opening in the vessel body; and o an opened position, in which the hatch is rotated around the rotational axis relative to the closed position for providing access to the further opening. 27. Kit of parts for forming a hatch for use in a vessel, comprising: at least one hatch body, in particular according to any of the clauses 1-20, said hatch body configured to be rotatably coupled around a rotational axis to a vessel at a primary side, wherein the primary side comprises at least one coupling area for coupling the hatch to a part of the vessel; at least one load transfer structure, in particular according to any of the clauses 1-20, wherein a part of said load transfer structure is configured to be coupled, preferably rigidly, to a part of a vessel; and at least one actuating mechanism, preferably according to any of the clauses 1-20, the hatch mechanism comprising at least one hinge shaft and at least one rotary actuator, wherein an output shaft of said rotary actuator is connected to the at least one hinge shaft.

[0041] The invention will be further elucidated by means of non-limiting exemplary embodiments illustrated in the following figures, in which: Figure 1 shows a conventional hatch system according to the prior art; Figure 2 shows a hatch according to an embodiment of the invention. Figures 3A and 3B shows a detailed view of the actuating mechanism and a cross-sectional view of a part of the shaft respectively according to another embodiment of the present invention; Figure 4 shows a detailed view of a power supply structure; and Figure 5 shows a side view of an actuatable hatch in an open position.

[0042] Figure 1 shows a conventional hatch for a vessel 1 is shown. The vessel 1 includes a hatch body 2 that is configured to be rotatably coupled around a rotational axis to the vessel 1 at a primary side. The hatch system includes an actuating mechanism 3 for actuating the hatch body 2 between a closed and an opened position. The actuating mechanism 3 includes a linear actuator 4 and a transmission 5. The linear actuator 4 is used to generate linear motion, which is then converted into rotational motion by the transmission 5 to actuate the hatch body 2. However, this conventional hatch system has several drawbacks. For instance, the actuating mechanism 3 and the transmission 5 require a significant amount of side space 6, which is the space on either side of the hatch body 2. This side space 6 is often unusable for the owner of the vessel 1, thereby reducing the available living space. Additionally, this technical space 6 restricts the width of the hatch body 2. Furthermore, the width of the hatch body 7 is limited by the available side space 6, which can restrict the size of the hatch that can be installed on the vessel 1. In addition to the hatch body 2 at the stern side of the vessel 1, the vessel 1 may also include at least one further opening arranged at a port side and / or starboard side of the vessel 1. These further openings are also equipped with hatches that are rotatably connected to the vessel 1. However, these hatches also suffer from the same drawbacks as the hatch body 2, as they also require significant side space 6 for their actuating mechanisms. The multiple actuating mechanisms 3 may require the hatches to be placed quite far apart from each other to accommodate the hatch mechanisms 3.

[0043] Figure 2 illustrates a vessel 100 equipped with a hatch 101 according to the present invention. The hatch 101 comprises a hatch body 102 that is rotatably coupled to the vessel 100 at a primary side 104. The primary side 104 of the hatch body 102 includes two coupling areas 103 in this non-limitative embodiment for connecting the hatch 101 to the vessel structure 108. In contrast to conventional designs using linear actuators, such as depicted in Figure 1, this embodiment incorporates an actuating mechanism 105 for actuating the hatch between closed and opened positions. The actuating mechanism 105 is accommodated within the hatch body 102, significantly reducing intrusion into the vessel's interior space. The figure demonstrates the space-saving advantage of this design. The side space 106 required for the actuating mechanism is notably smaller compared to conventional systems. This is emphasized by the comparison of hatch body width 107 to the width of a conventional hatch body (labeled as 7 in figure 1). The vessel structure 108 is shown interfacing with the hatch 101, particularly at the coupling area 103. This interface additionally allows for improved installation and operation of the hatch 101. Overall, Figure 2 highlights the compact nature of the new hatch design, particularly the actuating mechanism 105 showcasing how it minimizes intrusion into the vessel's interior while maintaining full functionality. The integration of the actuating mechanism 105 within the hatch body 102 represents a significant improvement over conventional linear actuator systems in terms of space efficiency. To provide power towards the actuating mechanisms 105 the hatch comprises a power supply structure 118. The power supply structure 118 provides a power interface between the vessel and the hatch 101. The power supply structure is depicted in more detail in figure 4 and is in this embodiment centrally arranged in the hatch 101. Therefore, the power supply structure 118 requires no side space and hence substantially leaves the design of the vessel around the hatch 101 unhindered.

[0044] Figures 3A and 3B show the actuating mechanism 105 and the load transfer structure 111 in more detail. Figure 3A shows the top view, and figure 3B a section view of the hatch, where the section is made on the centre line of the hingeline. In figure 3A, the hatch body 102 is rotatably coupled around a rotational axis 114 to the vessel 100 at a primary side 104. The primary side 104 thereto comprises at least one coupling area 103 for coupling the hatch 101 to a part of the vessel 100. The load transfer structure 111 forms the interface between the actuating mechanism 105 and the vessel structure 108. The actuating mechanism in this embodiment is formed by two hydraulic rotary actuators 109, which are coupled to the hatch body 102 via one or more bolts 110. As can be seen in figure 3A the load transfer structure 111 carries the hinge shaft 113, to which hinge shaft the output shaft of the actuator 109 is connected, as is shown in figure 3B. The load transfer structure is coupled to the vessel structure 108 via a mounting surface 112. The mounting surface 112 is positioned at a small distance from the vessel 108, the space between is filled with epoxy to set the final position, fixating the bolts is preferably performed after placing and curing the filler. The bolts may allow for precise alignment of the axis of the load transfer structure 111. In the embodiment depicted the load transfer structure 111 is entirely arranged in at least one coupling area 103. This arrangement may allow for the hatch 101 to be securely coupled to the vessel 100. The coupling area 103 may be formed by a recess arranged in the primary side 104 of the hatch body 102. This configuration may provide a secure and stable connection between the hatch 101 and the vessel 100. In some cases, the load transfer structure 111 may protrude between 100 mm and 500 mm beyond the rotational axis 114 of the hatch 101. This may provide sufficient space for the actuating mechanism 105 and other components of the hatch 101. The exact protrusion distance may depend on the specific design and requirements of the hatch 101 and the vessel 100.

[0045] Figure 3B depicts the output shaft 115 of each rotary actuator 109 is connected to the hinge shaft 113 of the actuating mechanism 105. The hinge shaft 113 is rigidly coupled to the output shaft 115 via one or two shear keys 117. The shear key provide for transfer of the torque from output shaft 115 to hinge shaft 113. The hinge shaft 113 may also be coupled via shear keys (not shown) to the load transfer structure 111, in particular a shaft support thereof. The shaft support of the load transfer structure 111 is the part carrying the hinge shaft 113. The use of shear keys 17 for coupling the output shaft 115 and hinge shaft 113 may allow the rotary actuators 105 to generate the necessary torque to rotate the hatch 101 from a closed to an open position, and vice versa. The output shaft 115 of at least one rotary actuator 109 and the hinge shaft 113 are concentrically connected such that their axes coincide. This configuration may allow for a more efficient transfer of torque from the rotary actuator 105 to the hinge shaft 113, thereby facilitating the rotation of the hatch 101. In this figure, each rotary actuator 109 is coupled to the hatch body 102. This coupling is achieved through a bearing structure 116 comprising one or more bearings arranged between the bearing structure 116 and the hinge shaft 113 and / or hatch body 102. This arrangement may allow for the separation of load paths for shear forces due to the mass of the hatch 101 and torque generated by the rotary actuators 105. This separation of load paths may further compact the design of the hatch 101.

[0046] Figure 4 shows a detail of the power supply structure 118. The power supply structure 118 allows for power to be supplied to e.g., the rotary actuators from the vessel 108. The first part 120 of the power supply structure 118 is connected or connectable to the hatch body 102, particularly in a coupling area 103, and a second part 119 of the power supply structure 118 may be connectable to a part of the vessel 108. This configuration may allow for a continuous supply of power to the rotary actuator 105, thereby facilitating the rotation of the hatch 101. In the depicted embodiment, the first part of the power supply structure 118 is at least partially formed by at least one hollow axial connection 120. The axis along which the hollow axial connection 120 extends substantially coincides with the rotational axis 114 of the hatch body 102. Additionally, the hollow axial connection 120 is coupled to the hatch body 102. Rotation of the hatch does not interfere with the supply of power through the supply structure 118 since the hatch 101 can rotate around the axial hollow connection 120. This can be achieved since the axial hollow connection 120 of the power supply structure 118 is connected to the hatch body 102 via at least one bearing structure 121, which bearing structure 121 is essentially watertight. This arrangement may prevent water ingress into the hatch body 102, thereby protecting the internal components of the hatch 101, and allowing for mutual rotation. The second part of the power supply structure 118 is at least partially formed by at least one hollow lateral connection 119. The hollow interior of the axial connection 120 and lateral connection 119 are mutually connected, and an end of the lateral connection 119 facing away from the hollow axial connection 120 may be configured to be coupled to the vessel 108. This configuration may allow for a more efficient transfer of power from the vessel 108 to the hatch.

[0047] Figure 5 depicts a part of the hatch 101 according to an embodiment of the invention. The hatch 101 is provided with at least one stopping element 123, arranged at the primary side 104 of the hatch body 102. The stopping element 123 may be configured to co-act with a part of the vessel 100 to define a maximum rotational movement of the hatch body 102. This configuration may prevent the hatch 101 from rotating beyond a certain point, thereby ensuring its proper functioning and safety. The stopping element 123 may limit the rotational movement of the hatch 101 in the opened position, thereby causing the upper side of the hatch body 102 to be aligned or even flush with the vessels interior floor. In order to efficiently stop the hatch 101 from rotating further the vessel 100 is provided with at least one bump stop 124. The bump stop 124 may be configured to interact with the stopping element 123 of the hatch 101 when the hatch 101 is in the opened position. This interaction limits or even obstructs the rotational movement of the hatch 101, thereby ensuring that the hatch 101 remains in the desired position when opened. This is efficient since it reduces the torsional load on the actuating mechanism. In some cases, the stopping element 123 may be provided with a resilient damping material, such as rubber. This material may absorb some of the impact forces generated when the stopping element 123 interacts with the bump stop 124, thereby reducing the wear and tear on these components and enhancing their lifespan. This figure shows the hatch 101 is in its fully opened position, at least a part of the hatch body 102 abuts against the bump stop 124 of the vessel. This interaction between the hatch body 102 and the bump stop 124 ensures that the hatch 101 remains in the desired position when opened.

[0048] It will also be apparent that the invention is not limited to the working examples shown and described herein, but that numerous variants are possible within the scope of the attached claims that will be obvious to a person skilled in the art. The verb "comprise" and conjugations thereof used in this patent publication are understood to mean not only "comprise", but are also understood to mean the phrases "contain", "substantially consist of", "formed by" and conjugations thereof. The ordinal numbers used in this document, like "first", "second", and "third" are used only for identification purposes. Hence, the use of expressions like a "second" component, does therefore not necessarily require the co-presence of a "first" component.

Claims

1. Actuatable hatch for a vessel, the hatch comprising: - A hatch body, said hatch body configured to be rotatably coupled around a rotational axis to a vessel at a primary side, wherein the primary side comprises at least one coupling area for coupling the hatch to a part of the vessel, - At least one load transfer structure, at least partially arranged in at least one coupling area, wherein a part of said load transfer structure is configured to be coupled, preferably rigidly, to a part of a vessel, - At least one actuating mechanism for actuating the hatch between a closed and an opened position, said actuating mechanism comprising; o At least one hinge shaft, wherein said hinge shaft is at least partially carried by or suspended in the load transfer structure; o At least one rotary actuator, accommodated within the hatch body, wherein an output shaft of said rotary actuator is connected to the at least one hinge shaft, Wherein at least one of the hinge shaft or output shaft or the rotary actuator is connected to a part of the hatch body.

2. Hatch according to claim 1, wherein at least one load transfer structure comprises: - a mounting base, wherein said mounting base comprises a mounting surface configured to be connected, directly or indirectly, to a part of the vessel; - at least one shaft support, positioned at a distance from the mounting surface of the mounting base, wherein the shaft support is configured to accommodate at least a part of at least one hinge shaft.

3. Hatch according to claim 2, wherein at least one shaft support comprises a shaft support base portion and a shaft support cap portion, mutually enclosing at least a part of the hinge shaft, wherein the shaft support base portion is rigidly connected to the mounting base, and wherein said shaft support cap portion is releasably connectable to the shaft support base.

4. Hatch according to any of the preceding claims, wherein each actuating mechanism comprises a pair of rotary actuators, each accommodated within the hatch body, wherein the output shaft of each of the rotary actuators preferably coincides with the rotational axis of the hinge shaft, wherein an output shaft of each actuator is connected to the at least one hinge shaft of the actuating mechanism.

5. Hatch according to any of the preceding claims, wherein the output shaft of at least one rotary actuator and at least one hinge shaft are concentrically connected such that their axes coincide, wherein the rotational axis of the hatch body and the rotational axis of the hinge shaft preferably coincide.

6. Hatch according to any of the preceding claims, wherein at least one rotary actuator is coupled to the hatch body, and wherein the output shaft and hinge shaft and load transfer structure are mutually fixedly connected, preferably wherein the output shaft is fixedly connected to the hinge shaft via one or more shear keys, and wherein the hinge shaft is preferably fixedly connected to the load transfer structure, in particular the shaft support, via one or more shear keys and / or splines and / or clamps.

7. Hatch according to any of the preceding claims, wherein at least one rotary actuator is coupled to the hatch body via at least one bearing structure comprising one or more bearings arranged between said bearing structure and the hinge shaft and / or hatch body.

8. Hatch according to any of the preceding claims, wherein at least one rotary actuator is coupled to a part of the hatch body which extends substantially perpendicular to the hinge shaft and / or output shaft.

9. Hatch according to any of the preceding claims, the hatch further comprising: - At least one power supply structure for supply of at least an actuating power from a vessel to the actuating mechanism, in particular to at least one rotary actuator, wherein a first part of the power supply structure is connected or connectable to the hatch body, in particular in a coupling area, and wherein a second part of the power supply structure is connectable to a part of the vessel.

10. Hatch according to claim 9, wherein the first part of the power supply structure is at least partially formed by at least one hollow axial connection, wherein an axis along which the hollow axial connection extends substantially coincides with the rotational axis of the hatch body.

11. Hatch according to claim 10, wherein the second part of the power supply structure is at least partially formed by at least one hollow lateral connection, wherein a hollow interior of the axial connection and lateral connection are mutually connected, and wherein an end of the lateral connection facing away from the hollow axial connection is configured to be coupled to a vessel.

12. Hatch according to any of the claims 9-11, wherein at least one power supply structure is arranged partially, optionally substantially entirely, within a coupling area, preferably wherein the coupling area in which the power supply structure is arranged is situated substantially centrally on the primary side of the hatch body.

13. Hatch according to any of the preceding claims, wherein at least the actuating mechanism, and preferably also at least a part of the load transfer structure, extends between approximately 100 mm to 500 mm beyond the rotational axis of the hatch, preferably between 100 mm and 400 mm.

14. Vessel comprising: - a vessel body comprising at least one opening, wherein said opening is preferably arranged on a stern side of the vessel body; - at least one hatch according to any of the preceding claims, wherein the hatch is rotatably connected to the vessel body via the load transfer structure, and configured to be moved between: o a closed position, in which the hatch substantially closes the opening in the vessel body; and o an opened position, in which the hatch is rotated around the rotational axis relative to the closed position for providing access to the opening.

15. Kit of parts for forming a hatch for use in a vessel, comprising: - at least one hatch body, in particular according to any of the claims 1-13, said hatch body configured to be rotatably coupled around a rotational axis to a vessel at a primary side, wherein the primary side comprises at least one coupling area for coupling the hatch to a part of the vessel; - at least one load transfer structure, in particular according to any of the claims 1-13, wherein a part of said load transfer structure is configured to be coupled, preferably rigidly, to a part of a vessel; and - at least one actuating mechanism, preferably according to any of the claims 1-13, the hatch mechanism comprising at least one hinge shaft and at least one rotary actuator, wherein an output shaft of said rotary actuator is connected to the at least one hinge shaft.

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