33 results about "Surfboard fin" patented technology

Provided is a system including a fin box that allows surboard fins to be installed, removed or adjusted to the front or rear of the board within the box and a means for installing the box on the surfboard. More importantly, the fins can be installed in the fin box, and adjusted or removed from the fin box without the use of tools. By using the fin box installation system, manufacturers can effectively locate, align and install the fin box on the surfboard. More importantly, the manufacturers are able to lean and rotate the fins precisely at any desired angles and achieve precise and critical symmetrical mounting of the fins with relation to the centerline of the surfboard.

A protective, removable cover for a surfboard fin. The fin cover may be made of vinyl or other suitable pliable material and conforms to the shape of a standard surfboard fin with a gently rearward curved front edge and a rearward curved rear edge. Formed along the front ad rear edges of the fin cover are small indentations that compress the fi cover against the front and rear edges of the surfboard fin, respectively, to securely hold the fin cover over the fin thereby eliminating the need for adhesives or snaps.

A surfboard fin is fixed when it is used, and removed when it is not used. If the fin is not removed when the fin is not used, it produces an inconvenient state during transportation of the surfboard and the like. However, at present, certain screws are used for its fixing or removing. This work requires much amount of labor and a surfboard playing person feels much inconvenience for this work. The present invention provides a method capable of easily fixing a fin to or removing a fin from a surfboard manually. A rectangular groove is formed at the surfboard, a fitting box is embedded into the groove and fixed with adhesive agent. An inner groove is formed at the central part of the box, the inner groove has two protrusions at right side and two protrusions at left side at the side parts. When the fin is set in the inner groove, the two fitting grooves of respective the right and left sides are provided at the legs of the fin, fitted to the protrusions of the inner groove, whereby the fin is fixed. Fixing or removal of the fin can be carried manually in an easy manner. The fin is not removed during its use, but rigidly fixed.

Provided is a system including a fin box that allows surboard fins to be installed, removed or adjusted to the front or rear of the board within the box and a means for installing the box on the surfboard. More importantly, the fins can be installed in the fin box, and adjusted or removed from the fin box without the use of tools. By using the fin box installation system, manufacturers can effectively locate, align and install the fin box on the surfboard. More importantly, the manufacturers are able to lean and rotate the fins precisely at any desired angles and achieve precise and critical symmetrical mounting of the fins with relation to the centerline of the surfboard.

A display device is provided which may be used to display surfboard fins and related product literature. In one example, a display device includes a plurality of tubes and machined parts which may be assembled and configured as further disclosed herein. Such a display device may be used, for example, to hold and secure surfboard fins to facilitate display of the fins and permit the handling of the fins by consumers. Advantageously, the display device may also be implemented to prevent the fins from being completely detached from the display device without the use of an appropriate security device. The display device may also be implemented to hold and secure information (e.g., product literature) associated with the fins.

A new design for a self-releasing surfboard fin and box is presented. The fin is held in the fin box by an attachment means that permits the fin to release easily when struck. The fin is retained connected to the box and the board by means of a fin leash. The fin is easily reattached by inserting the fin and then re-tightening the attachment means.

The present invention relates to a surfboard fin system which includes a generally horizontal hydrofoil intersecting or connecting with one or more vertical fins. The generally horizontal hydrofoil of the invention is designed using principles of hydrodynamics, that is, the forces generated by the flow of water over a hydrofoil or wing, to create a force that pulls downward on the fin system and, in turn, downward on the tail end of the water planing hull or surfboard.

A pivotal surfboard fin assembly for use on a surfboard, the assembly comprising: an insert bracket having a board face mountable to the bottom surface of the surfboard and a bracket face with a lock pin aperture and a flex plug cavity; an elastomeric flex plug having a flex plug hole, a first flex plug surface, and a second flex plug surface, the flex plug disposed in the flex plug cavity; a surfboard fin having a fin blade, a mounting edge, a flex pin channel, a fixed lock pin mountable to the surfboard fin and disposable into the lock pin aperture, a biased flex pin slidably disposable into the flex pin channel and the flex plug hole; and a first compression pin and a second compression pin engaged with the insert bracket and operative to laterally compress the flex plug.

A retaining structure for a surfboard fin includes a mounting base secured in the undersurface of a surfboard, a fin member and two blocks. The mounting base has a receptacle and two holding portions. The fin member has a connecting section to be embedded in the receptacle of the mounting base and a body section extending from the connecting section. The body section of the fin member protrudes outside the undersurface of the surfboard and has front and rear ends inclined outwardly. Each block is detachably mounted on the respective holding portion of the mounting base and defines a recess in a side according to the slope of the respective inclined end of the body section so that the inclined ends of the body section can be fitted in the recesses of the blocks and suppressed by the blocks and thereby be secured onto the mounting base.

The present invention is directed, in part, to an apparatus and methods related to an adapter for surfing or other water sports equipment that employ use of fins and fin boxes during their operation. Specifically, the present invention relates to an adapter that allows a surfer to fit a FCS® fin and engage it tightly and securely. The adapter, with the fin engaged, is fitted into the fin box of a surfboard that employs use of a Future® fin box. The user is able to quickly change a broken fin. The present invention is further directed to a system for attaching fins to surfboards that employs elements that allows a surfer to quickly replace broken or inoperable fins on the surfer's surfboard allowing replacement of such fins with new a new fin, even in the instance in which the fin and fin box originate from two different manufacturers.

An adjustable surfboard fin inserted and secured into a groove-like securing member buried in a bottom of a surfboard, wherein an inserted portion is made of an elastic member and divided into two pieces in a thickness direction of the adjustable surfboard fin, thereby enabling a slit formed between the two pieces to be adjustable by a setscrew is provided.

The surfboard fin, in particular, a long surfboard fin has been fixed to or removed from the surfboard under application of a washer and a screw. This operation is quite inconvenient and the fin is removed or fixed when the surfboard is used or is not used, resulting in that the prior art fin has required a quite amount of labor for it. The present invention enables this operation to be carried out manually in an easy manner. The box is fixed to a groove formed at the surfboard with adhesive agent and then the inside part of the box is formed with two grooves standing at different levels. The front long groove is positioned at a slight higher location and one pin of the fin can be inserted into the groove. The rear part pin can be inserted into several L-shaped grooves arranged at a slight lower part of the rear part of the box. The fin has a slight higher front part, has a step and the rear part is positioned at a slight lower location and the front part and the rear part have a total number of two pins each of which is set at the front part and the rear part, respectively. With such an arrangement as above, the fin can be fixed by fitting the two pins into both grooves and the troublesome fixing or removing operation of the fin can be overcome.

An adjustable surfboard fin inserted and secured into a groove-like securing member buried in a bottom of a surfboard, wherein an inserted portion is made of an elastic member and divided into two pieces in a thickness direction of the adjustable surfboard fin, thereby enabling a slit formed between the two pieces to be adjustable by a setscrew is provided.

The present invention relates to a lifted fin apparatus comprising one or more lifted fin elements with foiled tin components for a reduction of pressure and drag and an increase in surfboard lift as well as a method of achieving surfboard lift through, the use of said apparatus. Generally, the lifted fin apparatus comprises two or more lifted fin elements exhibiting a foil design on one or more of the fin surfaces. The individual fin elements may comprise a substantially vertical fin attached to a first edge of a base member and oriented at a substantially 90° angle in relation to the bottom surface of the surfboard or to the first edge of the base member. The fin elements may further comprise an angular fin mounted to a second edge of the base member at one end and the lower portion of the first, fin at the other end. In said embodiment, a bend or elbow is formed between a first fin component of angular fin and base member proximate the point of attachment at second edge of base member. Alternatively, the base member may not have a defined second edge representing the intersection between base member and a first fin component of angular fin, but rather the base member and the angular fin may be manufactured as a unitary structure with a bend or elbow between base member and a first fin component as described below.

[Problem] The present invention relates to a surfboard fin attachment structure. More specifically, the invention addresses the problem of providing a surfboard fin attachment structure, which is capable of detachably attaching a fin to a surfboard, wherein the attachment structure is capable of tight fitting even though easy attachment and detachment are possible and allows fitting without fin shaking or shuddering. [Solution] A surfboard fin attachment structure comprising: pin insertion recesses on both side surfaces of a cavity and, continuous therewith, grooves that continue in the depth direction of the cavity, said grooves extending from a given depth towards the back of the direction of board movement in the longitudinal direction of the fin box; and, on both sides of the fin attachment base, pins corresponding to the pin insertion recesses. The fin is attached by aligning the pins with the pin insertion recesses and inserting the attachment base, and after insertion, moving the fin towards the back of the direction of board movement.

The present invention relates to a lifted fin apparatus comprising one or more lifted fin elements with foiled tin components for a reduction of pressure and drag and an increase in surfboard lift as well as a method of achieving surfboard lift through, the use of said apparatus. Generally, the lifted fin apparatus comprises two or more lifted fin elements exhibiting a foil design on one or more of the fin surfaces. The individual fin elements may comprise a substantially vertical fin attached to a first edge of a base member and oriented at a substantially 90° angle in relation to the bottom surface of the surfboard or to the first edge of the base member. The fin elements may further comprise an angular fin mounted to a second edge of the base member at one end and the lower portion of the first, fin at the other end. In said embodiment, a bend or elbow is formed between a first fin component of angular fin and base member proximate the point of attachment at second edge of base member. Alternatively, the base member may not have a defined second edge representing the intersection between base member and a first fin component of angular fin, but rather the base member and the angular fin may be manufactured as a unitary structure with a bend or elbow between base member and a first fin component as described below.

The invention relates to a casting and forming device of a silica gel mould for fins of a surfboard, and belongs to the technical field of surfboard fin processing. The casting and forming device comprises a bottom plate, wherein a forming device and a plastic clay leveling device are arranged on the bottom plate; four baffle plates are arranged in the forming device; the four baffle plates are enclosed to form a rectangle; four slide blocks are further arranged in the forming device; a screw and two guide columns are arranged between each baffle plate and the slide block in front of the outerside of the corresponding baffle plate; a pressure plate, a supporting frame, a pressure rod and four third guide columns are arranged in the plastic clay leveling device; the four third guide columns are separately mounted on four corners of the bottom plate; the uppermost ends of the four third guide columns are co-equipped with the supporting frame; and the pressure plate is further mounted among the four third guide columns. The casting and forming device further solves the problem that working efficiency is affected as a casting framework of an existing surfboard fin silica gel mould iscomplex in dismounting. The casting and forming device further solves the problem that flatness of a mould parting surface of the existing silica gel mould is poor.

In broad embodiment, the present invention is a removable surfboard fin adapter that allows removable fins, fin boxes and fin systems from different manufacturers to be compatible with each other. The present invention is a device used to enable a two-tabbed type removable surfboard fin to be received and secured in the recess of a single-tab type surfboard fin receiving box that, without said device, would not be able to receive and secure a two-tabbed type removable surfboard fin. The present invention solves a common problem for surfboard owners who own multiple surfboards, which contain removable fin systems from the two most common removable fin system manufacturers. It is a disadvantage for the surfboard owner in situations like this because the surfboard owner must purchase multiple sets of fins for each respective removable fin system and bring multiple sets of fins for each removable fin system when traveling.

A removable surfboard fin adapter that allows removable fins, fin boxes and fin systems from different manufacturers to be compatible with each other. A two-tabbed type removable surfboard fin is received and secured in the recess of a single-tab type surfboard fin receiving box that would not otherwise be able to receive and secure a two-tabbed type removable surfboard fin. The adapter includes two slots that accept the tabs of the two-tabbed fin. The front, rear, or both front and rear of the adapter include a notch for securing he adapter to the single-tab receiving box. Angled slots are provided for canted fins.

An outer mounting body is made of semi-soft material having a primarily flat planar shape formed with an upper housing portion, and an outer flange portion having a planar upper surface tapering from the housing portion to outer peripheral edges of the mounting body and adapted to be mounted to flexible or curved surfaces such as those of an inflatable surfboard. An inner mounting insert made of rigid material is molded within the outer mounting body and has an upper recess for sturdily mounting an object such as a surfboard fin. The inner mounting insert may be formed asymmetric for reversibly mounting left and right side fins near the edges of a surfboard.

The invention relates to a manufacturing device for a silica gel mold of a surfboard fin, belonging to the technical field of processing of surfboard fins. The manufacturing device comprises a base plate which is provided with a molding unit, a pouring unit and a plasticine leveling unit, wherein four baffle plates are arranged in the molding unit and define into a rectangular shape; four slidersare arranged in the molding unit; a screw and two guide columns are arranged between each baffle plate and a slider located right ahead of the outer side of the same baffle plate; a press plate, a supporting frame, a press rod and four third guide columns are arranged in the plasticine leveling unit; and feed drum supporting frames, a feed drum, a stirring blade and stirring blade fixing supportsare arranged in the pouring unit. The manufacturing device provided by the invention solves the problem of large occupied space for storage of a pouring frame of the silica gel mold of the surfboard fin, the problem of poor flatness of the silica gel mold manufactured in the prior art, and the problem of difficult cleaning of residual bubbles in the silica gel mold and residual silica gel solidified on the wall of a silica gel filled container.

A surfboard fin has a curved forward fin portion and a straight rearward fin portion. When attached to a surfboard, the curved forward portion is positioned on the surfboard so the curvature of the forward portion is directed toward the centerline of the surfboard. The concave curve of the forward portion allows for faster and easier maneuverability of a surfboard while in use. In order to reduce drag caused by the curvature of the forward fin portion, one or more through holes may be formed through the forward fin portion to allow water to pass through the fin and reduce drag.

An outer mounting body is made of semi-soft material having a primarily flat planar shape formed with an upper housing portion, and an outer flange portion having a planar upper surface tapering from the housing portion to outer peripheral edges of the mounting body and adapted to be mounted to flexible or curved surfaces such as those of an inflatable surfboard. An inner mounting insert made of rigid material is molded within the outer mounting body and has an upper recess for sturdily mounting an object such as a surfboard fin. The inner mounting insert may be formed asymmetric for reversibly mounting left and right side fins near the edges of a surfboard.

The invention relates to the technical field of surfboard fins, in particular to a surfboard fin and a manufacturing technology thereof. The manufacturing technology comprises the following steps of A, cutting a calico, a honeycomb screen cloth and glass into the shape of a fin; B, opening a mold, sequentially laying the cut glass, the cut calico, the cut honeycomb screen cloth into the mold, arranging a plurality of convex blocks on the inner side face of the top of the mold, and closing and screwing down the mold; C, injecting resin into the mold, baking and forming the resin, and conducting cooling to obtain a fin, wherein a plurality of grooves are formed in one side of the fin; D, opening the mold, taking out the formed and cooled fin, and sanding and polishing the fin to obtain the surfboard fin. The obtained surfboard fin is low in cost, easy and convenient to use, low in weight, high in buoyancy force and capable of reducing resistance, improving lift force and improving the whole performance.

A fin for a surfboard, having a main body which comprises a first edge which is in contact with the board when the fin is secured to the board, a leading edge at the front and a trailing edge at the rear, a rear curve connecting the leading edge and the trailing edge, the trailing edge comprising a forwardmost front tip. The main body is extended rearwards by an arm which extends from a straight line which is perpendicular to the first edge and passes through the front tip of the trailing edge, as far as the rear curve, the arm having a length greater than approximately 8 cm.

The invention relates a silastic mould casting framework of surfboard fins and belongs to the technical field of surfboard fins processing. The silastic mould casting framework of surfboard fins comprises a base.The base plate is provided with four baffles, and the four baffles are formed in the rectangular shape. Four sliding blocks are arranged on the base plate, and each sliding block is correspondingly located in the front of the outside of the four baffles.Screw rods and two guide pillars are arranged between each baffle and the front of the outside of the sliding blocks.The silastic mould casting framework of surfboard fins solves the problem of the existing silastic mould casting frameworks of the surfboard fins with large quantity, large storage space and inconvenient management. The silastic mould casting framework of surfboard fins also solves the problem that the work efficiency is affected by the tedious disassembly and assembly of the existing silastic mould casting frameworks of the surfboard fins.

A watercraft fin removal tool for facilitating the removal of a detachable fin coupled to a watercraft body. The tool comprises an elongate body having a fin engagement head at one end and a handle at an opposing end. In use, the head is configured to engage the fin such that a sufficient leverage force may be applied to the fin by the user at the head via the handle to detach the fin from the watercraft body. In the preferred embodiment, the tool is designed for the removal of detachable surfboard fins. But, it may also be configured to remove fins from other watercrafts, such as wakeboards, paddleboards and the like.

The invention relates to a casting device in a silica gel mold manufacturing device of a surfboard fish fin, and belongs to the technical field of surfboard fish fin machining. The casting device comprises a casting device body, wherein a material cylinder support frame, a material cylinder, stirring blades and stirring blade fixing frames are arranged in the casting device body; the material cylinder is arranged in the middle of the material cylinder support frame; the stirring blade fixing frames are arranged on the outer surface of the material cylinder, and are rotatable; the stirring blades are arranged in the material cylinder, and are clamped by the stirring blade fixing frames. By adopting the casting device, the problem of residue of bubbles in the silica gel mold due to non-uniform distribution of silica gel is solved, and the problem that solidified residual silica gel on the wall of a container filled with the silica gel is difficult to clean is also solved.

A watercraft fin removal tool for facilitating the removal of a detachable fin coupled to a watercraft body. The tool comprises an elongate body having a fin engagement head at one end and a handle at an opposing end. In use, the head is configured to engage the fin such that a sufficient leverage force may be applied to the fin by the user at the head via the handle to detach the fin from the watercraft body. In the preferred embodiment, the tool is designed for the removal of detachable surfboard fins. But, it may also be configured to remove fins from other watercrafts, such as wakeboards, paddleboards and the like.

Fin plug assemblies for mounting a removable watercraft fin are disclosed. In some embodiments the fin plug assemblies include a fin plug and a mounting insert, wherein the fin plug is configured to mount removable fins (e.g., surfboard fins) to a surface of a watercraft. In some embodiments, the mounting insert has a laminar or sandwich construction. Methods of manufacturing the fin plug assemblies and watercraft including the fin pug assemblies are also described.