• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Detachable surfboard, reduces its volume and dimensions, comprises 4 main parts, where 2 of them will be in charge of offering a suitable rigid structure, while the remaining 2 are inflatable and provide volume to the product, since through its deformation capacity allow the containment of air between the different parts of the table. This configuration also allows the use of materials and the design of a shape for the board, which makes it possible to develop a sustainable surfboard, with reduced costs, a replicable and automated manufacturing, and the ability to surf a wide range of waves of different shapes and sizes. Developing with all this a complete product that manages to solve a large part of the problems that are tried to be solved in the surfboard sector. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2831549A1
    申请号:ES202130451
    申请日:2021-05-19
    公开日:2021-06-08
    发明作者:Calderon Juan Aguirre
    申请人:Universidad Politecnica de Madrid；
    IPC主号:
    专利说明:

    [0004] Object of the invention
    [0006] The present invention is related to the sector of technologies focused on sports equipment, more specifically to the surfboard industry, where it stands out for its removable characteristics and the use of environmentally sustainable materials.
    [0008] Background of the invention
    [0010] In the first place, with respect to the main field, the removable surfboards, it refers to the boards that can be divided into different parts and thus allow the improvement of their portability. Currently, in this industry it is difficult to see something out of the ordinary, that is, most of the boards are made in one piece with an internal polyurethane or polystyrene core and an external layer made of fiberglass, even so, they can be found a wide variety of patents based on the possible division into smaller parts of the board that would improve its portability. Among all of them, some of the most relevant will be cited: US3409920, US5711692, US7347755, US7390234, US8123580, US8123580, US20130029547 (A1).
    [0012] All these patents mentioned solve the transportability problem in a similar way, developing a system that allows the closure between the parts, but without redesigning any other characteristics of the table, such as materials, weight, robustness, manufacture, dimensions or suitable shapes. Do not elaborate in a more extensive way some of these characteristics, or if it is carried out through a mere comment that indicates that the different pieces of the table will continue to be made in the same way, and with the same materials that are carried decades ago, it means that a robust solution to the problems that surround this product, the surfboard, has not yet been developed.
    [0014] On the other hand, there are also, although in lesser quantity, patents that seek to solve both this and other problems related to this product from a different perspective.
    [0015] For example, patents US9045201 (B1) and WO2017069637 (A1) describe the use of alternative materials to those currently used in surfboards, such as cork or different types of organic composites that seek to reduce the polluting footprint that it produces today. the necessary equipment to perform this sport.
    [0017] Patents like these seek to solve contamination problems, as mentioned above, but they forget, in part, to develop a solution that also manages to provide a viable answer to the other problems discussed above.
    [0019] Finally, trying to solve most of these problems, it is worth mentioning patents US20090049757 (A1) and US7662006 (B2), which mainly focus on transportability and the use of materials that are not very harmful to the environment.
    [0020] All the patents dealt with throughout the technical field of the invention seek to generate a viable solution to the problems existing in current surfboards, however, none of these proposals is having a great reception, being the most relevant in the current market a concept very similar to the one that appears in patent US20090049757 (A1), which is an inflatable board that maintains its shape thanks to the filaments that join the two main areas of the board. However, these types of products are intended for larger boards, since they are not viable for regular surfing due to their characteristics and performance.
    [0022] As can be seen by studying the surfboard sector in depth, most of the problems that surfboards have suffered since their creation have not been solved by any of the inventions mentioned above, or by any other. These problems to be solved were raised by the inventor of this patent, after carrying out the ViP (Vision in Product Design) methodology, which allowed him to perceive the future needs of which we can highlight: the increase in the number of people who practice the surfing, the search for greater health through sports, the growth of leisure and the transmission of values through sports, people's environmental responsibility, the need to manufacture boards on a large scale, the use of more general boards , the greater mobility and globalization that is being experienced and the individual identity that people seek to develop. These, and many other factors treated through the methodology allowed to focus and define, in a correct way, the reason for this product. Therefore, the present invention is developed after understanding that the problems that will be listed below The following were the most important aspects to be solved in this product.
    [0024] - Most of the boards do not allow you to surf a wide range of waves.
    [0025] - Transportability, both by the user and in a vehicle, is not comfortable. - Most surfboards are made manually, thereby raising costs and not allowing a more technical study of the forms.
    [0026] - Pollution of the environment by the materials used and the manufacturing processes of the boards.
    [0027] - The short life cycles of the products.
    [0029] Objectives and advantages
    [0031] The objectives and advantages of this invention, as can be guessed after the previous definition of the problems found in current products, are to achieve a table with a design with the following properties: allowing both a comfortable way of being transported from one place to another , without taking up much space, as well as providing high performance when used as a tool to surf a wide range of waves; allow the development of a manufacturing system with greater automation in its processes; and that it can be done through the use of sustainable materials, characterized by a long life cycle and the ability to be recycled.
    [0033] Achieving all this, a complete product will be achieved that solves all the disadvantages of the current ones, a light, transportable, sustainable board with the environment, with a reduced price and high performance.
    [0035] Brief description of the invention
    [0037] The invention has achieved the objectives set through a design of a surfboard made up of: two rigid pieces and two inflatables that are joined unevenly, through the inflation of the volume they house, forming two elements, front and back. of the table, which are joined by means of the overlap between the ends of the rigid pieces, so that the front and rear part comprise, each one of them, a rigid piece and an inflatable one, where each inflatable piece is joined with the corresponding piece rigid by inflation. These joints exposed above manage to develop a board with hydrodynamic properties, lightness, rigidity, flexibility and reactivity to the user's movements similar or superior to those currently used.
    [0038] In the preferred embodiment, the front rigid part is an upper front rigid part, the front inflatable part is a lower front inflatable part, the rear rigid part is a lower rear rigid part, and the Rear inflatable is an upper rear inflatable piece, so that a compact and rigid configuration is obtained that allows surfing.
    [0039] In one embodiment, the joint configuration between the rigid pieces and the inflatable pieces comprises bead pads to form the front and rear. These supports are preferably configured by means of a perimeter channel in which an internal perimeter projection is housed, providing a watertight closure.
    [0041] Furthermore, it has been envisaged that the joint configuration between the rigid pieces and the inflatable pieces comprise a longitudinal rib that retreats into a longitudinal guide, providing the configuration of the board with adequate rigidity for surfing.
    [0043] The union between the front and rear is made by overlapping the ends of the rigid pieces.
    [0045] Furthermore, it has been envisaged that the rigid parts are provided with a recess and a transverse surface that is provided with an extension configured to be located in the recess of the rigid part of the opposite, front or rear part, recess in which the extension by means of fixation.
    [0047] The transverse surfaces of the rigid parts include a recess for the location of the inflation valves of the inflatable parts, configured so that, when the board is assembled, the valves are hidden inside, preventing them from being damaged during the use of the board.
    [0049] Rigid and inflatable pieces have an imaginary plane of axial symmetry in the longitudinal plane of the table.
    [0051] It has also been envisaged that the lower rear rigid part is provided with slots for inserting keels and provided with a series of longitudinal concavities for channeling the water, the curvatures of which progressively decrease from its rear end to an area where the lower surface of the table remains with the same curvature. In addition, the tail of the lower rear rigid piece centrally comprises a double swallow-shaped tip, all of this to facilitate the handling of the board.
    [0052] The main benefit of the described configuration is to provide, through a simple structure formed by the 4 main pieces, the bases to be able to develop a surfboard that solves all the points discussed in the previous section. This ability is set forth in greater detail in the exemplification incorporated in the detailed description of the invention.
    [0053] This basic structural design of the removable surfboard allows to carry out a surfboard that can be easily transported thanks to its ability to be divided into different pieces and, as it is inflatable, its volume can also be reduced.
    [0054] Description of the drawings
    [0055] This section describes the accompanying illustrative drawings.
    [0056] FIG. 1 Side, top and bottom view of a conventional generic surfboard, used to expose the name assigned to each of its component parts. (41) Nose.
    [0057] (42) Longitudinal curvature (Rocker).
    [0058] (43) Edges.
    [0059] (44) Tail.
    [0060] (45) Upper area (Deck).
    [0061] (46) Merits.
    [0062] (47) Keels.
    [0063] (48) Perimeter.
    [0064] (49) Length.
    [0065] (50) Width.
    [0066] FIG. 2 Isometric and exploded view of the invention, this figure shows the 4 main parts of the removable table.
    [0067] (1) Upper front rigid part.
    [0068] (2) Lower rear rigid part.
    [0069] (3) Lower front inflatable part.
    [0070] (4) Upper rear inflatable part.
    [0071] FIG. 3 Shows the lap joint that occurs between the front and rear rigid parts.
    [0073] (9) Recessing of the upper front rigid piece.
    [0075] (10) Flat extension of the upper front rigid part.
    [0077] (16) Recess of the lower rear inflatable part.
    [0079] (17) Flat extension of the lower rear inflatable part.
    [0081] (36) Cross-sectional area of the upper front rigid part.
    [0083] (37) Cross-sectional area of the lower rear rigid part.
    [0085] FIG. 4 Shows the union between the front rigid piece with the front inflatable, and the rear rigid piece with the rear inflatable, showing how to go from 4 to 2 elements.
    [0087] FIG. 5 Shows a detail of some cylinders implemented in the transverse surfaces of the overlap joint, between the upper front rigid part and the lower rear rigid part, where the air valves of the inflatable parts will be incorporated.
    [0089] (8) External part of the recess (cylindrical) provided in the upper front rigid part to house the valve of the lower front inflatable part.
    [0091] (14) Internal part of the hollow (cylindrical) provided in the lower rear rigid part to house the valve of the upper rear inflatable part.
    [0093] (22) Valve of the lower front inflatable part.
    [0095] (32) Valve of the upper rear inflatable part.
    [0097] FIG. 6 It shows, through cross sections, the way in which the rigid pieces are joined with their inflatable counterparts. On the sides of both sections, the joints are shown through a type of hitch known as beaded, in which the inflatable pieces press on the rigid ones, while in the center of both the joints made by means of a central longitudinal rib can be seen. of the inflatable parts with a central longitudinal guide of the rigid parts.
    [0098] (5) Heel support upper front rigid piece.
    [0100] (6) Central longitudinal guide of the upper front rigid part.
    [0102] (7) Central longitudinal rib of the lower front inflatable part.
    [0103] (11) Lower rear rigid piece heel support.
    [0104] (12) Central longitudinal guide of the lower rear rigid part.
    [0105] (13) Central longitudinal rib of the upper rear inflatable piece.
    [0106] (18) Lower front inflatable piece heel support.
    [0107] (19) Support heel top rear inflatable piece.
    [0108] (33) Sample of seal tightness.
    [0109] FIG. 7 Shows the leveling implemented at the lap joint between the front and rear of the board.
    [0110] FIG. 8 Shows a detail in which the grooves implemented in the lower rear rigid piece can be seen, which will serve as holes to introduce the fin bases.
    [0111] (15) Slits in the lower rear rigid part.
    [0112] FIG. 9 Elevation view showing the complete perimeter of the invention.
    [0113] (21) reduction of the front perimeter.
    [0114] (24) reduction of the rear perimeter.
    [0115] FIG. 10 Shows, through the cross section of the front piece, the shape of the upper area.
    [0116] FIG. 11 Shows, through the side view, the longitudinal curvature of the invention. (22) Elevation of the longitudinal curvature of the upper front rigid part.
    [0117] (25) Elevation of the longitudinal curvature of the lower rear rigid part.
    [0118] (30) Elevation of the longitudinal curvature of the lower front inflatable part.
    [0119] (32) Elevation of the longitudinal curvature of the upper rear inflatable part.
    [0120] FIG. 12 Shows a longitudinal half of the table, in which, through different cross sections, the transformation of the shape of the edges can be seen throughout the invention.
    [0121] (20) Edge shapes of the upper front rigid piece.
    [0122] (23) Edge shapes of the lower rear rigid part.
    [0123] (29) Edge shapes of the lower front inflatable.
    [0124] (31) Edge shapes of the upper rear inflatable piece.
    [0126] FIG. 13 Shows the shape of the tail of the invention.
    [0128] (26) Wings of the tail.
    [0130] (27) Swallow tail closure.
    [0132] FIG. 14 Shows the channels and concavities developed in the bottoms of the lower rear rigid piece.
    [0134] (28) Longitudinal concavities.
    [0136] Detailed description
    [0138] In this section, the design of each of the parts of the developed surfboard will be described in a more precise way, it being understood that the details of each of these are only by way of example, and the drawings, terminology and phraseology They are merely indicative, and should not be considered as a limitation to its scope in the sense of protection of the present invention.
    [0140] With regard to the nomenclature used during the explanation of each of the pieces, especially when referring to the different parts of a conventional table, figure 1 shows the names to be used to refer to them, as reflected in the previous section.
    [0142] The invention is made up of four main parts, as can be seen in figure 2, an upper front rigid part (1), and a lower rear rigid part (2), which form a main rigid structure, and which are responsible for providing most of the physical and dimensional characteristics to the table. This is because, in addition to being the only two non-deformable pieces, they incorporate an overlap joint between the front and rear parts of the table, as can be seen in Figure 3 and as described below. The other two main pieces are determined by a lower front inflatable piece (3) and an upper rear inflatable piece (4), which constitute removable pieces, which allow, thanks to their elastic properties, to generate the desired volume both in the front and upper area. back of the table.
    [0144] The union of these parts is carried out through two different methods, the first of these is produced between each of the rigid structural parts with its corresponding removable inflatable part, as can be seen in figure 4. This union is generated thanks to the pressure exerted by the inflation air on both parts, for which the edges of each of them are essential, since when pressing one on the other ends up generating a heel support (5, 11), for the upper front rigid piece with the lower front inflatable piece and a heel support (18, 19), for the lower rear rigid piece with the upper rear inflatable piece , thereby achieving a total sealing of the internal air volume. This pairing causes two pieces to be generated, which form the front and back of the table, the coupling of both parts, back and front, is carried out through an overlapping joint both in the upper and lower area of the table. table, as can be seen in figure 3 and as described later.
    [0146] To achieve a more complete understanding of how these two types of unions are produced, it is essential to discuss the components or characteristics that these must have.
    [0148] In the first place, to satisfactorily perform the union between the rigid parts with the removable inflatables, it is necessary to use an air valve for inflation, and an adequate shape of the edges, of both parts, so that it can be produce the commented check. The air valves (22 and 32) of the inflatable parts, as can be seen in figure 5, are placed in a hole implemented in the joining surface of the rigid parts, of which the external part ( 8) of the hole of the upper front rigid piece, and the internal part (14) of the hole of the lower rear rigid piece, thus allowing that in addition to not causing possible hydrodynamic problems, the valves are not accessible when performing the sport and therefore possible related accidents can be avoided.
    [0150] With regard to the shape of the edges of the different pieces, these are designed looking that due to the pressure exerted by the air on the internal surface of the removable inflatable pieces outwards, an adequate hooking can be produced by means of the supports (5, 11, 18 and 19) with the rigid parts, as can be seen in figure 6. This type of hitches, called beading, can be found in a multitude of inflatable products on the market, such as car or bicycle tires. For example, these supports are configured by means of a perimeter channel in which an interior perimeter projection is housed. In addition to this joint between the edges of the rigid and inflatable pieces, another joint is also produced in the central area of both, as can be seen in Figure 6, by means of a longitudinal guide (6) provided in the piece (1) and a longitudinal rib (7) arranged in the piece (3) to form the front part of the table, and by means of a longitudinal guide (12) of the piece (2) and a longitudinal rib (13) of the piece (4), to form the rear of the table, so that the deformation of the removable inflatable parts is adequate, and also adds rigidity to the connection.
    [0152] Second, the union between the rigid structural parts (1 and 2) is made, which occurs through the overlap of two transverse surfaces (36 and 37), respectively provided on the upper front rigid part and on the rear rigid part. lower. The lower side of the transverse surface (36) of the upper front rigid part (1) is provided with a flat extension (10) and the upper side of the transverse surface (37) of the lower rear rigid part comprises a flat extension (17) that are housed, respectively in recesses (9 and 16) provided in the rigid parts, in which they are fixed by means of screws and nuts, so that, as can be seen in figure 3, they achieve that both front and rear bind together in a stable and rigid way. In addition, it should be mentioned that so that this joint does not interfere with the hydrodynamic properties, fundamental in the surfboard, the extensions and recesses are designed so that, when making the joint, the surfaces of the extensions are at the same level, flush with the surface of the table as can be seen in figure 7.
    [0154] The last generic characteristic of the invention to be dealt with is the design made for the correct implementation of the keels. For this, some slits (15) have been provided, as can be seen in figure 8, which are in the rear area of the rear rigid piece and which are designed so that they can be made through the same aluminum plate with the one that makes the whole piece. These grooves allow the fin base to be inserted comfortably and safely.
    [0156] Once the base design of the invention has been exposed, a more specific design of a representative example of what can be achieved is defined.
    [0158] Starting from the front, a wide and trimmed nose (41) is designed, as can be seen in figure 9, which makes it possible to reduce the size of the surfboard and give it a more parallel shape to the perimeter (48) of the board. , which manages to accumulate a greater amount of volume in a smaller table, and, therefore, it is achieved that it is more maneuverable. Behind the nose is the upper area (45) (Deck) of the board, which is flat along its entire surface, as can be seen in the section of figure 10.
    [0160] Regarding the longitudinal curvature (42) (Rocker), which is the curvature in the longitudinal median plane of the profile of the table, it has a similar elevation (30, 25) at both ends, approximately 89 mm, as can be seen Observe in figure 11, that it is an elevation below the average elevation presented by the conventional boards in the front area of the board, due to the cutout of the nose, and above the average in the back, which, together with the little curvature of the perimeter (21 and 24) and the longitudinal concavities (28) From the bottom of the lower rear rigid piece, which will be seen later, the perfect cocktail is created for a quick lift of the board.
    [0162] The shape of the edges varies along the board, as can be seen in figure 12. At the rear, where greater freedom of movement is sought by spitting the water, a less continuous curvature is implemented, moving in a from the edge (20, 29) in the center of the table formed by the front and back parts with a ratio between the edge of the upper and lower front part and the edge of the upper and lower back part, of 60/40, to an edge shape (31, 23) of 100/0 in the tail, passing through an 80/20 ratio in the central area of the rear. On the other hand, in the front part it is tried to maintain a more cordial relationship with the water flows with which the table interacts, for this reason it incorporates some edges (20, 29) that go from a 60/40 ratio, in the center of the table, at 50/50, on the nose.
    [0164] Regarding the design of the tail, this is closely related to both the perimeter and the shape developed for the bottom of the table, since wings (26) make up the external part of the tail, so that they allow, for a hand, a more parallel perimeter, and, on the other, the implementation of longitudinal concavities (28) whose curvatures have been designed at the bottom of the table. Furthermore, as can be seen in figure 13, the tail is closed with a double swallow-shaped tip (27). With this design, a good grip and stability of the back area of the board is achieved, in big and fast waves, while the width also allows surfing small and flat waves.
    [0166] As for the concavities (28) of the bottom, already mentioned previously, they include different types of concavities that are incorporated into a global concavity of this entire surface, so that longitudinal channels are formed, as can be seen in the sections of the Figure 14, these start from the rear with more pronounced curvatures, which provides a wider channel for water dissipation, as can be seen, and these curvatures of the different concavities are reduced together as one advances towards the front, until you reach an area where the entire lower surface of the board is in the same curvature.
    [0167] The design of the grooves (15) for housing the keels developed for this model table, it is a group of four grooves (15), as can be seen in figure 8, aligned to the projections of the concavities of the bottom of the table that allows the flow of water to be easily distributed between the channels.
    [0169] All these exposed parts work together to ensure that the surfer can surf as many times as possible, both in small waves with little force and in others of great size and power, and with a high capacity for maneuverability and dynamism, achieved thanks to to its small size with respect to the volume it incorporates.
    [0171] The selection of materials, for each of the parts of the surfboard, is based on principles of toughness, durability, lightness and sustainability that were translated into parameters such as: elastic modulus, Poisson's ratio, density, Yield strength, recyclability, resistance to fresh and salt water, UV resistance, price, carbon footprint and the ability to be manufactured through different processes, all through the Cambridge Engineering software tool Selector (CES) EduPack.
    [0173] In the first place, the removable parts are made of Thermoplastic Polyurethane (TPU) since it has characteristics such as being able to deform with relative ease, this allows its comfortable handling when putting it on and taking it off, and also makes it possible to heel in a simple adapting its outer flanges to those of the structural part. On the other hand, it is also rigid enough so that its deformation when inflated is not excessive.
    [0175] Second, the structural parts are developed through Aluminum 5083 H343, since it contains the most suitable characteristics in aspects such as rigidity, minimal deformation, the ability to be subjected to different manufacturing processes, sustainability, resistance to fresh and salt water or costs, as already mentioned above.
    [0177] Exemplifying the manufacturing processes that should be carried out to make the surfboard on a large scale, that is, with a high number of units manufactured on a regular basis, is essential to estimate the viability of the designed product.
    [0179] As with the other decision-making in the invention, these have been made based on a holistic view of the different factors that are of significant importance throughout the process.
    [0180] The structural parts are made through cold stamping, since among its main advantages are: the fast pressing cycle times; complex geometries; low costs, waste and maintenance; or the improvement of the mechanical properties of the material due to its microstructure.
    [0182] As for the middle guides and the heel supports, they are made by profiling.
    [0183] Through these two processes, the entire product can be manufactured as a whole using a single type of aluminum foil.
    [0185] Second, the removable parts, made of Thermoplastic Polyurethane (TPU), are made through injection molding, since this material is melt-processable, due to its thermoplastic characteristics. One of the most significant advantages of this method, in addition to allowing complex shapes, is that it allows the duplication of many identical high-quality objects, thanks to the reuse of the mold, in addition, the parts designed through this method will require little or no subsequent machining.
    [0187] All these decisions taken, both in the design of the example and in those of the generic invention, have been put to the test through different finite element studies, using Solidworks Finite Element Analysis, all of them being satisfactory after carrying out several iterations during the different decision making.
    [0189] This exemplification of a board that is achieved thanks to the invention of the basic structural design of the removable surfboard, allows us to overcome all the deficiencies exposed on current products, in order to achieve a lightweight, transportable, environmentally sustainable board. with a low price and high performance.
    权利要求:
    Claims (12)
    [1]
    1. Detachable surfboard, characterized by comprising a front part and a rear part, each one equipped with a rigid part (1, 2) and an inflatable part (3, 4), configured to join each inflatable part with the corresponding rigid part by inflating the inflatable parts, and where said front and rear part are configured to join forming the table.
    [2]
    2. Table according to claim 1, where the rigid part of the front part is an upper front rigid part (1), the inflatable part of the front part is a lower front inflatable part (3), the rigid part of the front part rear is a lower rear rigid piece (2), and the rear inflatable piece is an upper rear inflatable piece (4).
    [3]
    3. Table, according to previous claims, where the joint configuration between the rigid pieces and the inflatable pieces comprise heel supports (5, 11, 18, 19) to form the front and rear.
    [4]
    4. Table according to claim 3, where the heel supports are configured by means of a perimeter channel in which an interior perimeter projection is housed, providing a watertight closure.
    [5]
    5. Table, according to previous claims, where the joint configuration between the rigid pieces and the inflatable pieces comprise a longitudinal rib (7, 13) that is retreated in a longitudinal guide (6, 12).
    [6]
    6. Table, according to previous claims, where the union between the front and rear is made by overlapping the ends of the rigid pieces.
    [7]
    7. Table, according to claims 2 and 6, where the rigid pieces comprise a recess (9, 16) and a transverse surface (36, 37), which is provided with an extension (10, 17) configured to be located in the recess of the rigid part of the opposite part, front or rear, recess in which the extension is fixed by means of fixing means.
    [8]
    8. Table, according to claim 7, wherein the transverse surfaces of the rigid parts comprise a recess (8, 14) for the location of the inflation valves of the inflatable parts, configured so that, when the table is assembled, the valves are hidden in its interior.
    [9]
    9. Table, according to previous claims, where the rigid and inflatable pieces have an imaginary plane of axial symmetry in the longitudinal plane of the table.
    [10]
    10. Board according to claim 2, wherein the lower rear rigid part comprises grooves (15) for inserting keels.
    [11]
    11. Board, according to claim 2, wherein the lower rear rigid piece comprises longitudinal concavities (28) whose curvatures progressively decrease from the rear end to an area where the lower surface of the board remains with the same curvature.
    [12]
    12. Table according to claim 2, wherein the tail of the lower rear rigid piece centrally comprises a double swallow-shaped point (27).
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    同族专利:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3289227A|1965-11-10|1966-12-06|Jr John M Kelly|Surfboard with nose and/or midsection lift generating means|
    US3409920A|1966-10-25|1968-11-12|Charles R. Brownley|Sectionalized surfboard|
    US8123580B1|2009-07-15|2012-02-28|Thomas Erik Meyerhoffer|Interface system for segmented surfboard|
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    US10059411B1|2016-04-09|2018-08-28|Shaine Shahin Ebrahimi|Quad bow paddle board|
    CN107719594A|2017-10-30|2018-02-23|苗华忠|A kind of safe surfboard|
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    2021-06-08| BA2A| Patent application published|Ref document number: 2831549 Country of ref document: ES Kind code of ref document: A1 Effective date: 20210608 |
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    申请号 | 申请日 | 专利标题
    ES202130451A|ES2831549B2|2021-05-19|2021-05-19|REMOVABLE SURFBOARD|ES202130451A| ES2831549B2|2021-05-19|2021-05-19|REMOVABLE SURFBOARD|
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