Actuator system for folding bulwark section of marine vessel

Abstract

An actuator system for automating movement of a folding bulwark section of a marine vessel between upright and folded-down positions. The system includes one or more actuator assemblies, each comprising an actuator mounted to a structural plate configured for attachment to the vessel. The folding bulwark section is pivotably connected to the vessel via a hinge assembly including a hinge pin seated in a hinge seat in the structural plate. A torque pin operatively couples the actuator to the bulwark section and is received in a guide slot defined in the structural plate. The guide slot follows an arcuate path centered on the hinge axis to shepherd arcuate movement of the torque pin. In various embodiments, the actuator assemblies may be mounted to the vessel or integrated within the bulwark section, and may be used singly or in pairs to control motion from one or both ends of the bulwark.

Description

BACKGROUND OF THE INVENTION

[0001] The present invention relates to marine vessels, and more specifically to actuator systems for folding bulwarks in marine vessels.

[0002] In the field of marine vessel design, optimizing space utilization and enhancing functionality while maintaining structural integrity and safety remain key priorities. Traditional boat configurations often provide limited deck space, particularly in smaller or mid-sized vessels where every square foot is valuable. To increase usable area and improve access to the water, some vessels have incorporated hinged sections of the side wall (also sometimes known as bulwarks) that can be folded down to create temporary extensions of the deck.

[0003] This fold-down side wall concept has become increasingly popular, especially in leisure and luxury boats, offering users enhanced flexibility for recreational activities such as swimming, fishing, or sunbathing. However, in some current implementations, the movement of these side wall sections is manual, requiring significant effort to deploy or stow, and often involving latches, pins, or other mechanical hardware that may be cumbersome or unreliable in marine environments. These manual systems can be difficult to operate safely, particularly when the vessel is in motion or when conditions on deck are wet or unstable.

[0004] To address these issues, some automated systems have been developed to facilitate the movement of side wall segments between upright and deployed positions. These typically involve hydraulic or electric actuators and may be integrated into the vessel's control systems. While such systems can reduce manual labor and improve convenience, they often introduce new challenges. Existing automated mechanisms can be overly complex, prone to mechanical failure, or difficult to maintain in saltwater environments. Others may lack precise control or safety features needed to prevent unintentional deployment or secure locking in both the open and closed positions.

[0005] Additionally, many existing automated solutions are custom-engineered for specific vessel models, making them costly to produce and difficult to retrofit onto other boats.

[0006] There remains a need for a more robust, reliable, and efficient mechanism that allows a portion of a boat's side wall to transition between upright and folded-down positions. Ideally, such a system would be suitable for a wide range of vessel types, integrate seamlessly into the boat's structure, and function reliably under the demanding conditions typical of marine environments.SUMMARY OF THE INVENTION

[0007] An actuator system for a marine vessel to automate movement of a folding bulwark section between upright and folded down positions is provided. The actuator system includes one or more self-contained actuator assemblies, each including an electro-hydraulic linear actuator or hybrid actuator that is powered electrically and includes a motor and integrated internal hydraulics capable of extending and retracting a. Each actuator assembly includes a structural plate that carries the electro-hydraulic actuator and is readily mountable to the boat structure. The folding bulwark section is mounted to the boat at a hinge about which the folding bulwark section may pivot between upright and folded down positions. The hinge may be formed by a fixed hinge pin that is rotatably fitted within a corresponding hinge seat. The actuator system may include a torque pin that operatively interacts with the actuator to drive movement of the folding bulwark section about the hinge pin. The structural plate defines a guide slot that receives the torque pin and shepherds relative movement between the plate and the torque pin, thereby protecting the boat structure and / or the folding bulwark section from stress that otherwise might have arisen from the application of force to an unconstrained torque pin. The guide slot extends along an arc with a vertex coaxial with the hinge pin.

[0008] In one embodiment, the actuator system includes a single actuator assembly disposed adjacent one end of the folding bulwark section to move the bulwark section from one end.

[0009] In alternative embodiments, the actuator system may include a pair of actuators located adjacent opposed ends of the folding bulwark section to move the bulwark section from opposite ends.

[0010] In one embodiment, the actuator system includes one or more actuator assemblies that are mounted within the folding bulwark section and interact with a torque pin fixed to the boat structure adjacent to the folding bulwark section.

[0011] In one embodiment, the torque pin and the hinge pin are operatively engaged with the structural plate. The hinge seat may be defined by the structural plate. In one embodiment, the hinge seat may include a through-hole defined by the structural plate. A bushing may be fitted into the through-hole to facilitate rotational movement of the hinge pin within the hinge seat. In one embodiment, the free end of the hinge pin is threaded and the hinge pin is fixed in place by a nut threadedly fitted to the free end.

[0012] In one embodiment, the torque pin includes a fixed end and a free end with the torque pin disposed in the guide slot in the structural plate and the free end joined to the working end of the actuator. In one embodiment, the actuator is a linear actuator that is selectively extended and retracted with the relative movement of the torque pin and guide slot assisting in converting the linear movement of the actuator into pivoting movement of the folding bulwark section.

[0013] In one embodiment, the actuator system includes a pair of actuator assemblies joined to the boat structure adjacent to opposite ends of the folding bulwark section. In one embodiment, the boat structure may be recessed to receive the structural plate. For example, the boat structure may accommodate installation of an actuator assembly adjacent to opposite ends of the folding bulwark section. In some applications, it may be desired to locate structural components, such as frames, stringers and / or beams, so that the actuator assemblies can be rigidly connected directly the such structural components. In some applications, it may be desired to add supplemental structural components to the boat to provide support for the actuator assemblies.

[0014] In embodiments that include actuator assemblies on opposite ends of the folding bulwark section, the hinge pin may be a single continuous rod that extends entirely across the bulwark section with opposite ends seated in the hinge seats of the two actuator assemblies. Similarly, in embodiments of this type, the torque pin may be a single continuous rod that extends entirely across the folding bulwark section with opposite ends being couple to the working parts of the two actuators.

[0015] In yet another embodiment, the actuator is a linear actuator, such as an electro-hydraulic linear actuator, that is mounted to the structural plate and to the torque pin, whereby extension and retraction of the linear actuator moves the torque pin along the guide slot. In embodiments in which the linear actuator is an electro-hydraulic actuator, the hydraulic cylinder may be mounted to the structural plate and the hydraulic rod may be mounted to the torque pin.

[0016] In one embodiment, the boat structure may include a well configured to receive the bottom portion of the folding bulwark section. The well may be configured to accommodate the full range of motion of the bottom portion of the folding bulwark section as it is moved between the upright and folded down positions.

[0017] In one embodiment, the actuator system includes an actuator assembly or a pair of actuator assemblies integrated into the folding bulwark section. In embodiments of this type, the torque pin(s) may include a fixed end that is coupled to the boat structure adjacent to the folding bulwark section, whereby the actuator assembly (or assemblies) move with the folding bulwark section.

[0018] The present invention provides a novel system for automating movement of a folding bulwark section. This mechanism is designed to offer a highly compact, self-contained actuator assembly that is easily integrated into marine applications with minimal modifications to the existing boat structure. The present invention provides reliable operation, as well as improved resistance to wear and environmental exposure, thereby enhancing both safety and usability on board. The structural plate provides a single structural element that is easily mounted to a boat structural component, supports the actuator and provides a guide path for the torque pin. The actuator system can be provided with a single actuator assembly capable of operating the folding bulwark section assembly from one end or with a pair of actuator assemblies that cooperate to move the folding bulwark section from opposite ends. The actuator system can also be configured so that the structural plate provides a hinge seat for the hinge pin. The structural integrity of the folding bulwark section can be enhanced by using a hinge pin and / or a torque pin extending the full width of the folding bulwark section. The actuator system can, in alternative embodiments, be configured to use any of a wide range of actuators, such as a linear electric actuator, a linear hydraulic cylinder, a rotating electric actuator, a rotating hydraulic motor or a manual mechanical actuator, such as a lever arm. The accommodate the folding bulwark section, the boat may incorporate a well that receives the bottom end of the folding bulwark section and is shaped to provide a housing that accommodates the full range of the travel of the system.

[0019] These and other objects, advantages, and features of the invention will be more fully understood and appreciated by reference to the description of the current embodiment and the drawings.

[0020] Before the embodiments of the invention are explained in detail, it is to be understood that the invention is not limited to the details of operation or to the details of construction and the arrangement of the components set forth in the following description or illustrated in the drawings. The invention may be implemented in various other embodiments and of being practiced or being carried out in alternative ways not expressly disclosed herein. Also, it is to be understood that the phraseology and terminology used herein are for the purpose of description and should not be regarded as limiting. The use of “including” and “comprising” and variations thereof is meant to encompass the items listed thereafter and equivalents thereof as well as additional items and equivalents thereof. Further, enumeration may be used in the description of various embodiments. Unless otherwise expressly stated, the use of enumeration should not be construed as limiting the invention to any specific order or number of components. Nor should the use of enumeration be construed as excluding from the scope of the invention any additional steps or components that might be combined with or into the enumerated steps or components.BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG. 1 is a perspective view of a portion of a boat showing a folding bulwark section in an upright position.

[0022] FIG. 2 is a perspective view of a portion of a boat showing a folding bulwark section in a folded down position.

[0023] FIG. 3 is a right side perspective view of the folding bulwark section and the actuator system showing the folding bulwark in the upright position.

[0024] FIG. 4 is a left side perspective view of the folding bulwark section and the actuator system showing the folding bulwark in the folded down position.

[0025] FIG. 5 is a perspective view of the actuator system.

[0026] FIG. 6 is a perspective side view of the actuator assembly on one end of the folding bulwark section.

[0027] FIG. 7 is a side view of the actuator system and a portion of the folding bulwark section in the upright position.

[0028] FIG. 8 is a side view of the actuator system and a portion of the folding bulwark section in the folded down position.

[0029] FIG. 9 is a plan view of the structural plate.

[0030] FIG. 10 is a perspective view of a portion of the boat showing the well.

[0031] FIG. 11 is a perspective view of a portion of the boat showing the actuator assemblies mounted at opposite ends of the well.

[0032] FIG. 12 is a perspective view of a portion of the boat showing an actuator assembly mounted at one end of the well.DETAILED DESCRIPTION OF THE CURRENT EMBODIMENTS

[0033] The present invention relates to an actuator system for use on marine vessels and, more particularly, to a system for automating the movement of a folding bulwark section between an upright position and a folded-down position. Referring now to the drawings, wherein like numerals indicate like components throughout the several views, various exemplary embodiments of the actuator system will be described in detail.

[0034] A current embodiment of the present invention is shown in FIGS. 1-12 and generally designated 10. FIGS. 1-12 show the actuator system 10 installed in a portion of an exemplary boat B with an exemplary folding bulwark section F. The illustrated boat B and folding bulwark section F are merely exemplary and not intended to limit the scope of the present invention. Rather, the present invention may be installed in a wide range of alternative boats incorporating a wide range of alternative folding bulwark sections.

[0035] In general, the actuator system 10 includes at least one actuator assembly 12a, 12b configured to drive pivoting movement of a folding bulwark section F. The bulwark section F is hingedly mounted to the vessel structure and is pivotable between a raised, upright position in which the bulwark forms a barrier or enclosure (See FIG. 1), and a lowered position in which the bulwark section is folded down (See FIG. 2), for example, to expand usable deck space or form a swim platform.

[0036] In the embodiment of FIGS. 1-12, the actuator system 10 includes two actuator assemblies 12a, 12b. Each actuator assembly 12a, 12b includes an electro-hydraulic linear actuator 14a, 14b or a hybrid actuator that operates electrically and includes internally integrated hydraulic components configured to efficiently convert rotary motion of a motor shaft to linear displacement of a hydraulic piston rod. The use of an electro-hydraulic linear actuator allows for precise, controlled motion and reduces the need for an external hydraulic power supply, thereby simplifying installation and maintenance.

[0037] The electro-hydraulic actuator 14a, 14b is mounted to a structural plate 16a, 16b, which serves as a base frame for the actuator assembly 12a, 12b. This structural plate 16a, 16b is designed for ease of integration with the existing boat structure and may be fixed to the hull, deck framing, or other rigid structural components (See, for example, stringers S, which are perhaps best shown in FIGS. 11 and 12). In certain embodiments, the boat structure may include recesses, wells, or mounting surfaces specifically designed to accommodate the actuator assembly 12a, 12b and its structural plate 16a, 16b. Supplemental framing members, such as beams, stringers, or brackets, may be added to support the actuator assembly 12a, 12b where necessary.

[0038] As noted above, the structural plate 16a, 16b serves as a mounting base for the actuator 14a, 14b and associated components. The structural plate 16a, 16b provides a rigid and stable interface between the actuator assembly 12a, 12b and the boat structure B, and generally plays a role in absorbing and distributing the mechanical loads generated during operation of the folding bulwark section F.

[0039] The structural plate 16a, 16b may be constructed from a marine-grade metal such as aluminum, stainless steel, or anodized steel, or may be fabricated from composite materials such as fiberglass-reinforced polymers, depending on weight, corrosion resistance, and structural requirements. The size, shape and configuration of the structural plate 16a, 16b may vary from application to application. In this illustrated embodiment, the structural plate 16a, 16b is a generally planar somewhat rectangular component providing a broad mounting surface configured to closely correspond with the structural component(s) to which it is to be mounted. The structural plate need not be planar, but may instead be shaped, for example, to closely interfit with shaped mounting surfaces. Mounting holes 30 are defined near the four corners of the structural plate and in a middle region, but the number, location and arrangement of mounting holes may vary to facilitate mounting.

[0040] The structural plate 16a, 16b is configured for surface mounting directly to a vertical or horizontal structural surface of the boat, such as a transom, bulkhead, deck support, or internal frame member. In the illustrated embodiment, the structural plates 16a, 16b mount to the internal stringers S and to the end walls 102 of the well 100 (as described in more detail below). If desired, the structural plate 16a, 16b may include pre-drilled mounting holes 30 that align with corresponding holes in the boat structure B, and may be fastened, for example, using marine-grade bolts, rivets, or threaded fasteners. Sealants or gaskets may be applied between the structural plate and the boat surface to prevent water ingress and isolate dissimilar materials to mitigate galvanic corrosion.

[0041] Although not shown, the structural plate 16a, 16b may be mounted into a recess or pocket that is formed in the boat structure. The recess may be molded, cut, or framed during vessel construction or retrofit and may be configured to receive the plate in a flush or partially recessed manner. Recessed installation allows the actuator assembly 12a, 12b to be more integrated into the boat's form, potentially improving aesthetics, minimizing interference with cargo or passenger movement, and providing additional protection from impact or the marine environment.

[0042] To facilitate secure integration into the boat structure, the mounting interface (e.g. a stringer face or a recessed mounting surface) may include reinforced walls or backing plates, which may be bonded, bolted, or laminated into the hull or deck. The structural plate 16a, 16b may then be fastened to these reinforcements, for example, using mechanical fasteners or structural adhesives.

[0043] In alternative embodiments, the structural plate 16a, 16b may be bracket-mounted to structural components, such as stringers, transverse frames, beams, or integrated supports. Mounting brackets may be fixed to the boat structure and configured to cradle or clamp the structural plate in position. This approach may allow for enhanced modularity and adjustability and may be especially useful for aftermarket installations or retrofits on existing vessels.

[0044] Where necessary, supplemental structural members may be installed to provide additional support and load distribution. For example, mounting flanges, welded frames, or gusset plates may be added to reinforce the area around the actuator assembly. These components may be custom-fabricated or modular and may be secured using welds, through-bolts, or adhesive bonding, depending on the materials and desired load paths.

[0045] The structural plate 16a, 16b may also include features to interface with the hull geometry, such as contoured edges, cutouts, or adjustable mounting tabs that allow it to conform to the local shape of the boat structure. In some cases, shim plates or spacers may be used to ensure proper alignment and load transfer, particularly where hull curvature or surface irregularities are present.

[0046] In high-load applications, particularly where large or relatively bulwark sections are employed, the structural plate 16a, 16b may include integrated stiffening ribs, load transfer bosses, or double-shear mounting points to ensure the actuator loads are efficiently transmitted into the vessel's primary structure. Vibration isolation features such as elastomeric mounts or bushings may also be employed between the structural plate and the vessel to reduce fatigue and noise transmission.

[0047] To facilitate inspection, service, and replacement, the structural plate 16a, 16b may be designed for removability. In such embodiments, fasteners, such as threaded inserts, quick-release pins, or captive bolts may be used to allow easy removal of the actuator assembly without disturbing the main vessel structure. Access panels or service hatches may also be provided to allow periodic maintenance.

[0048] The folding bulwark section F is attached to the boat at a hinge assembly 50 that enables rotation about a generally horizontal axis. In one embodiment, the hinge is formed by a hinge pin 22 rotatably fitted within a hinge seat 18a, 18b. The hinge seat 18a, 18b may be defined by the structural plate 16a, 16b and may take the form of a through-hole, optionally lined with a bushing to reduce friction and wear during pivoting. The hinge pin 22 may include a threaded free end secured with a nut to lock the hinge pin 22 in place. A locking nut is merely exemplary and the hinge pin 22 may be retained by alternative mechanisms.

[0049] To drive the folding action, the actuator assembly 12a, 12b interacts with a torque pin 24. In the illustrated embodiment, the actuator assembly 12a, 12b is mounted to the boat structure B adjacent to the folding bulwark section F. With this configuration, the torque pin 24 is fixed to the folding bulwark section F and has a free end (or pair of opposed free ends) that extends from the bulwark section F and is joined to the actuator 14a, 14b. In alternative embodiments in which the actuator assembly 12a, 12b is mounted to the folding bulwark section F, the configuration of the torque pin may be reversed with the torque pin fixed to the boat structure B. In the illustrated embodiment, the torque pin 24 is movably received within the guide slot 20a, 20b defined in the structural plate 16a, 16b. The guide slot 20a follows a curved arc centered on the axis of rotation of the hinge pin 22, thereby guiding the motion of the torque pin 24 in a path that corresponds to the pivotal movement of the folding bulwark section F between raised and folded-down positions. This configuration assists in transferring to the structural plate 16a, 16b the forces associated with converting the linear motion of the actuator 14a, 14b into rotational movement about the hinge pin 22. The interaction between the guide slot 20a, 20b and the torque pin 24 serves to contain and direct mechanical forces within the actuator assembly 12a, 12b, preventing lateral or torsional stress from being transferred directly to the folding bulwark section F and / or vessel structure B-depending on configuration. As a result, this feature, when employed, enhances durability and operational reliability of the actuator system 10 without the need for extensive and costly modification to the structural integrity of the folding bulwark section F or the boat structure B.

[0050] As noted above, the actuator system 10 of the illustrated embodiment includes a pair of actuator assemblies 12a, 12b that are arranged adjacent to opposite ends of the folding bulwark section F and cooperate to move the folding bulwark section F. In embodiments with this configuration, the actuator assemblies 12a, 12b may work in synchronization to ensure uniform and balanced motion of the folding bulwark section F. This configuration can provide more robust support, such as for longer bulwarks. In alternative embodiments, a single actuator assembly may be employed to move the folding bulwark section. For example, a single actuator assembly may be mounted at or near one end of the folding bulwark section. Single-actuator configuration may be sufficient for shorter or lighter bulwark sections.

[0051] In configurations with dual actuators, the hinge pin 22 and torque pin 24 may be continuous rods extending the full length of the bulwark section, with their respective ends interfacing with each actuator assembly (See FIG. 5). This arrangement provides structural continuity and synchrony between the two actuator mechanisms.

[0052] In alternative embodiments mentioned above, the actuator assembly (or assemblies) may be located within the folding bulwark section itself. In such cases, the torque pin (or torque pins) may be anchored to the vessel structure, and the actuator assembly (or assemblies) moves with the bulwark section as it pivots between raised and folded-down positions. This approach may prove advantageous where access to the boat structure is limited or where space optimization within the boat structure is desired.

[0053] The actuator 14a, 14b may be electrically controlled and may include position sensors, limit switches, or other feedback mechanisms to enable automated control. For example, to maintain synchronicity in the context of two actuator systems, the two actuators 14a, 14b may be configured to operate until they reach corresponding limit switches. When the actuators include position sensors, the controller can monitor the position readings and operate the two actuators to maintain the desired level of synchronicity. The actuator control system may be integrated with the vessel's onboard control system for user-actuated or programmed operation.

[0054] In certain embodiments, the vessel's hull or deck structure may define a well 100 (or trough) that extends below the deck D to receive the lower portion of the folding bulwark section F (See FIG. 10). When in the upright position, a bottom portion of the folding bulwark section F may be disposed in the well 100. When in the folded down position, the folding bulwark section F may be pivoted down into the well 100 with the bulwark section F extending generally horizontally beyond the periphery of the boat structure. The well 100 and folding bulwark section F may be configured so that the upward facing surface of the folded-down bulwark section F is generally flush with the top surface of the deck D. As perhaps best shown in FIGS. 11 and 12, the actuator assemblies 12a, 12b of the illustrated embodiment are mounted to the end walls 102 of the well 100, as well as adjacent stringers S. In embodiments of this configuration, the well 100 is provided with end walls 102 that have sufficient structural integrity to play their role in supporting the actuator assemblies 12a, 12b.

[0055] The actuator system 10 disclosed herein provides a compact, efficient, and reliable mechanism for automating the movement of folding bulwark sections, and is suitable for retrofit as well as for original equipment installation.

[0056] In various embodiments, the actuator 14a, 14b used to drive the movement of the folding bulwark section F may be selected from a range of actuator types, depending on the desired performance characteristics, space constraints, and integration requirements of the marine vessel. The actuator may be linear or rotary, electrically or hydraulically driven, or a hybrid system incorporating elements of both technologies. In some applications, the actuator may be a manual actuator, such as a lever or lever arrangement.

[0057] In the illustrated embodiment, the actuator is an electro-hydraulic linear actuator. This type of actuator integrates a compact electric motor 60 with a hydraulic pump 62 and cylinder 64 within a sealed unit. With reference to FIG. 6, the electric motor 60 drives the pump 62, which in turn pressurizes hydraulic fluid in the hydraulic cylinder 64 to extend or retract the actuator rod 66. Electro-hydraulic actuators are particularly well-suited for marine applications due to their high power density, smooth motion control, and elimination of external hydraulic lines. The contained design also reduces the risk of hydraulic fluid leakage, which is advantageous in sensitive marine environments. In operation, this type of actuator can offer the responsiveness and control of electric actuators with the power density and durability of hydraulic systems. One suitable electro-hydraulic actuator is commercially available from Park Hannifin.

[0058] In alternative embodiments, a purely electric linear actuator may be used. Electric actuators typically utilize a motor-driven lead screw or ball screw to convert rotary motion into linear motion. These actuators offer simplicity in control and integration with vessel electronics and may be preferred in applications where hydraulic systems are not desired. Electric linear actuators may also include integrated position sensors, limit switches, or encoders for precise control over bulwark positioning.

[0059] In other alternative embodiment, a hydraulic cylinder powered by an external hydraulic system may be employed. This configuration may be used where the vessel is already equipped with centralized hydraulic infrastructure. Hydraulic cylinders provide high force output and are well understood in marine environments. However, this type of actuator may require additional plumbing, valves, and a hydraulic power unit (HPU), which could increase installation complexity.

[0060] A pneumatic actuator may also be used in certain embodiments, though it may be less common in marine settings due to the compressibility of air and the resulting reduced control precision compared to hydraulic or electric actuators. Pneumatic actuators may be suitable for smaller bulwark sections or applications where rapid actuation and lightweight components are prioritized.

[0061] In some embodiments of the present invention, the actuator may take the form of a rotary actuator. Rotary actuators may be hydraulic, pneumatic, or electric and provide rotational output directly, potentially simplifying the conversion of actuator motion to the pivoting motion of the folding bulwark section. A rotary actuator may be coupled directly to the hinge pin or to a crank arm connected to the bulwark section. This configuration may be useful in tight spaces where a linear actuator cannot be easily accommodated.

[0062] In selecting the actuator type for a given application, considerations may include load-bearing capacity, environmental sealing, corrosion resistance, power availability on the vessel, ease of maintenance, and desired control interface.

[0063] Regardless of the actuator type, each actuator may be operatively coupled to a torque pin or equivalent mechanical linkage that facilitates the transfer of actuator motion to the folding bulwark section. Control of the actuator may be achieved through a variety of means, including manual switches, programmable logic controllers (PLCs), or integration with vessel automation systems. Safety features such as load-holding valves, emergency stop functions, and position sensors may be incorporated depending on regulatory or operational requirements. If multiple structural plates and actuators are used, the actuators can be wired simultaneously, using a single switch to drive both actuators at the same time.

[0064] This design of the actuator system can be made to fit a variety of different boat sizes, simply by changing one or more characteristics of the system, such as the distance of the assembly fwd-aft, or by changing the swing arc of the mount plate / articulate slot, or by changing the stroke length of the actuator.

[0065] Although the different elements and assemblies of the embodiments are described herein as having certain functional characteristics, each element and / or its relation to other elements can be depicted or oriented in a variety of different aesthetic configurations, which support the ornamental and aesthetic aspects of the same. Simply because an apparatus, element or assembly of one or more of elements is described herein as having a function does not mean its orientation, layout or configuration is not purely aesthetic and ornamental in nature.

[0066] Directional terms, such as “vertical,”“horizontal,”“top,”“bottom,”“upper,”“lower,”“inner,”“inwardly,”“outer” and “outwardly,” are used to assist in describing the invention based on the orientation of the embodiments shown in the illustrations. The use of directional terms should not be interpreted to limit the invention to any specific orientation(s).

[0067] In addition, when a component, part or layer is referred to as being “joined with,”“on,”“engaged with,”“adhered to,”“secured to,” or “coupled to” another component, part or layer, it may be directly joined with, on, engaged with, adhered to, secured to, or coupled to the other component, part or layer, or any number of intervening components, parts or layers may be present. In contrast, when an element is referred to as being “directly joined with,”“directly on,”“directly engaged with,”“directly adhered to,”“directly secured to,” or “directly coupled to” another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship between components, layers and parts should be interpreted in a like manner, such as “adjacent” versus “directly adjacent” and similar words. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items.

[0068] The above description is that of current embodiments of the invention. Various alterations and changes can be made without departing from the broader aspects of the invention as defined in the appended claims, which are to be interpreted in accordance with the principles of patent law including the doctrine of equivalents. This disclosure is presented for illustrative purposes and should not be interpreted as an exhaustive description of all embodiments of the invention or to limit the scope of the claims to the specific elements illustrated or described in connection with these embodiments. For example, and without limitation, any individual element(s) of the described invention may be replaced by alternative elements that provide substantially similar functionality or otherwise provide adequate operation. This includes, for example, presently known alternative elements, such as those that might be currently known to one skilled in the art, and alternative elements that may be developed in the future, such as those that one skilled in the art might, upon development, recognize as an alternative. Further, the disclosed embodiments include a plurality of features that are described in concert and that might cooperatively provide a collection of benefits. The present invention is not limited to only those embodiments that include all of these features or that provide all of the stated benefits, except to the extent otherwise expressly set forth in the issued claims. Any reference to claim elements in the singular, for example, using the articles “a,”“an,”“the” or “said,” is not to be construed as limiting the element to the singular. Any reference to claim elements as “at least one of X, Y and Z” is meant to include any one of X, Y or Z individually, any combination of X, Y and Z, for example, X, Y, Z; X, Y; X, Z; Y, Z, and / or any other possible combination together or alone of those elements, noting that the same is open ended and can include other elements.

[0069] Reference throughout this specification to “a current embodiment” or “an embodiment” or “alternative embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment herein. Accordingly, the appearance of the phrases “in one embodiment” or “in an embodiment” or “in an alternative embodiment” in various places throughout this specification are not necessarily all referring to the same embodiment. Additionally, the features, structures, or characteristics of one embodiment are contemplated for proper and full combination in any suitable manner in one or more other embodiments, which is fully contemplated herein. Further, features, structures, or characteristics of one embodiment or multiple embodiments are readily and completely mixed and matched with any features, structures, or characteristics of any other embodiment or multiple embodiments in varying combinations and permutations.

Claims

1. An actuator system for automating movement of a folding bulwark section of a marine vessel between an upright position and a folded-down position, the system comprising:at least one actuator operable to selectively produce motion;a structural plate configured to carry the actuator and to be mounted to a structure of the marine vessel, the structural plate defining a guide slot and a hinge seat, the guide slot following an arcuate path having a vertex coaxial with the hinge pin;a hinge assembly configured to mount the folding bulwark section to the vessel structure and allow pivoting of the folding bulwark section between the upright and folded-down positions, the hinge assembly including a hinge pin received in the hinge seat in the structural plate; anda torque pin extending between the folding bulwark section and the actuator, the torque pin movably received in the guide slot defined in the structural plate, the guide slot guiding movement of the torque pin during operation of the actuator.

2. The actuator system of claim 1, wherein the actuator is an electro-hydraulic actuator having an electric motor driving a hydraulic system to convert rotary motion of the motor to linear motion of a hydraulic rod.

3. The actuator system of claim 1, wherein the hinge seat comprises a through-hole defined in the structural plate and includes a bushing to facilitate movement of the hinge pin within the through-hole.

4. The actuator system of claim 3, wherein the hinge pin includes a threaded free end secured by a nut to assist in retaining the hinge pin within the hinge seat.

5. The actuator system of claim 1, wherein the torque pin includes a fixed portion coupled to the folding bulwark section, an extension portion received in the guide slot and a free end portion coupled to the actuator.

6. The actuator system of claim 1, wherein the actuator is mounted within the folding bulwark section and the torque pin is fixed to the vessel structure.

7. The actuator system of claim 1, wherein the structural plate is configured to be mounted within a recessed portion of the boat structure.

8. The actuator system of claim 1, further comprising a second actuator, a second structural plate, the second structural plate defining a second guide slot and second hinge seat, the actuators disposed near opposite end of the folding bulwark section and operating in concert to cooperatively move the folding bulwark section.

9. The actuator system of claim 8, wherein the hinge pin extends continuously across the folding bulwark section and is supported at opposite ends by the hinge seats of the two structural plates.

10. The actuator system of claim 8, wherein the torque pin extends continuously across the folding bulwark section and is coupled at opposite ends to the two actuators.

11. The actuator system of claim 1, wherein the actuator is selectively extendable and retractable, and wherein such motion of the actuator causes the torque pin to travel along the guide slot, thereby aiding in inducing pivoting movement of the folding bulwark section about the hinge pin.

12. A marine vessel with a folding bulwark section, wherein the folding bulwark section is movable between an upright position and a folded-down position, the vessel comprising:a vessel structure, including at least one of a stringer, a transom, a bulkhead and a well end wall;a folding bulwark section joined to the vessel structure; andan actuator system selectively affecting movement of the folding bulwark section relative to the marine vessel, the actuator system including:a hinge assembly joining the folding bulwark section to the vessel structure, the hinge assembly allowing pivoting of the bulwark section between the upright and folded-down positions, the hinge assembly including a hinge pin;a torque pin operatively coupled to the actuator and the folding bulwark section;at least one actuator selectively operable to produce linear motion; anda structural plate joined to the vessel structure and carrying the actuator, the structural plate defining a hinge seat and a guide slot, the guide slot extending along an arcuate path having a vertex coaxial with the hinge pin, the hinge pin seated within the hinge seat and the torque pin movable received within the guide slot,wherein the actuator includes a fixed part joined to the structural plate and a working part joined to the torque pin, whereby operation of the actuator causes relative movement between the torque pin and the guide slot, which in turn causes pivotal motion of the folding bulwark section about the hinge assembly between the upright and folded-down positions.

13. The vessel of claim 12, wherein the actuator is an electro-hydraulic actuator having an electric motor driving a hydraulic system to convert rotary motion of the motor to linear motion of a hydraulic rod.

14. The vessel of claim 12, wherein the hinge seat comprises a through-hole defined in the structural plate; andfurther including a bushing fitted into the through-hole receiving the hinge pin to facilitate movement of the hinge pin within the through-hole.

15. The vessel of claim 14, wherein the hinge pin includes a threaded free end secured by a nut to assist in retaining the hinge pin within the hinge seat.

16. The vessel of claim 12, wherein the torque pin includes a fixed portion coupled to the folding bulwark section, an extension portion received in the guide slot and a free end portion coupled to the actuator.

17. The vessel of claim 12, wherein the structural plate is configured to be mounted within a recessed portion of the boat structure.

18. The vessel of claim 12, further comprising a second actuator, a second structural plate, the second structural plate defining a second guide slot and second hinge seat, the actuators disposed near opposite end of the folding bulwark section and operating in concert to cooperatively move the folding bulwark section.

19. The vessel of claim 18, wherein the hinge pin extends continuously across the folding bulwark section and is supported at opposite ends by the hinge seats of the two structural plates.

20. The vessel of claim 19, wherein the torque pin extends continuously across the folding bulwark section and is coupled at opposite ends to the two actuators.

21. The vessel of claim 12, wherein the actuator is selectively extendable and retractable, and wherein such motion of the actuator causes the torque pin to travel along the guide slot, thereby aiding in inducing pivoting movement of the folding bulwark section about the hinge pin.

22. The vessel of claim 12, wherein the vessel structure defines a well configured to receive a bottom portion of the folding bulwark section when in the folded-down position, the well having a longitudinal extent and a pair of opposed ends; andwherein the actuators are disposed at opposite ends of the well to cooperatively support the folding bulwark assembly from opposite ends.

23. A system including a folding bulwark section and an actuator assembly for selectively moving the folding bulwark section between an upright position and a folded-down position, the system comprising:first and second hinge pins extending from opposite ends of the folding bulwark section;first and second torque pins extending from opposite ends of the folding bulwark section, the torque pins being offset from the hinge pins;first and second actuator assemblies situated at opposite ends of the folding bulwark section in operative engagement with the hinge pins and the torque pings, each actuator assembly including:a structural plate defining a hinge seat and an arcuate guide path, the guide path extending along an arc having a vertex generally coaxial with the hinge seat, wherein one of the hinge pins is seated within the hinge seat and one of the torque pins is seated within the guide path; andan electro-hydraulic actuator having an electric motor driving a hydraulic system to convert rotary motion of the motor to linear motion of a hydraulic rod, the electro-hydraulic actuator have a fixed part joined to the structural plate and a working part joined to one of the torque pins; andwherein the electro-hydraulic actuators of the first and second actuator assemblies are configured to be operated in concert to extend and retract in synchronicity to cause simultaneous movement of the torque pins along the guide paths, thereby moving the folding bulwark section from opposite ends.

24. The system of claim 23 wherein the first and second hinge pins are formed by a single rod extending through the folding bulwark assembly.

25. The system of claim 24 wherein the first and second torque pins are formed by a single rod extending through the folding bulwark assembly.

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