WO2003018395A1

WO2003018395A1 - Constructive disposition of adjustment of the removable lateral fins in surfboard

Info

Publication number: WO2003018395A1
Application number: PCT/BR2002/000101
Authority: WO
Inventors: Antonio Garcia
Original assignee: Antonio Garcia
Priority date: 2001-08-24
Filing date: 2002-07-17
Publication date: 2003-03-06
Also published as: PT03018395W; ZA200401434B; BR8101826Y1; BR8101826U; EP1425212A1

Abstract

Constructive disposition of adjustment of the removable lateral fins in surfboard that, besides conserving the removable fins and the possibility of the central fin when of the use of the usual disposition of three fins in the surfboard to fit longitudinally, has innovated by providing to the surfboard lateral fins (2) specific base (5) the possibility of, by juxtaposition to the fitting cup (1), endowed with opening or incision (3) with graduate rifts (4) in it tip front, to adapt the fin (2) to the usurer's need, with multiple angular tuning options to the sides, guaranteeing to the surfers the possibility to adapt the surfboards to their own ability degree in the surf pratice, as well as to the marine conditions, without for so being compelled to obtain different types of boards.

Description

"CONSTRUCTIVE DISPOSITION OF ADJUSTMENT OF THE REMOVABLE LATERAL FINS IN SURFBOARD " TECHNICAL FIELD

This patent of Utility Model refers to a constructive disposition of adjustment of the removable lateral fins in surfboard that allows multiple tuning options by means of juxtaposition of the fin to the graduate rift in the fitting cup, guaranteeing to the surfers the possibility to adapt the surfboards to their own ability degree in practice of the surf, as well as to the marine conditions, without for so be compelled to use different types of boards. BACKGROUND ART

The fins, while willing material bodies in the part of bass of the surfboards, elaborated with plastic foam (polyurethane) molded and covered by fine layer of polyester resin reinforced with fiber, usually of glass, since approximately the 1950 decade, consubstantiate in an important accessory of the surfboards, in view of the fact that the surfers depend on the positioning adopted to the fins and it disposition in the surfboard to have larger projection and speed or larger stability or larger perform maneuvers. In that way, different fin fitting techniques and positioning have been adopted.

They are commonly fixed on the lower part of the board, in number of one or more seeing that nowadays it assumes the preference of three fins, usually being used one of the four existent methods: (i) being fastened the fins to the board through resin reinforced with fiber around of the fins base, the "collage"; (ii) for the use of the known "fin box", that it allows, theoretically, the removal in cases of damages limited to the fin; (iii) for movable arrangement that allows the fin become inserted and removed of a compartment inside of the board; (iv) for movable arrangement that, besides allowing insert and removal, it allows the movement of the fin of disposition front and behind in the within compartment on the board; It happens that each one of those methods still doesn't assist to the surfers' needs of the adaptation to the personal and environmental circumstances of each case.

(i) The collage to the boards of the fins with fiberglass, yonder involving considerable costs of manual work, get the subsequent smooth and accomplishment of difficult and deficient quality, as well as it interferes in the hydrodynamic of the fins, once of that process it results a decrease in the height executes of the fin and for the fixation area to cause a drainage outside of water, generating turbulences and cavitations. Another great disadvantage in the collage is that happening any damage in the fin, the board remains disabled.

(ii) In "fin box's" use the disadvantage is denoted in the arduous fixation, expensive and harmful to the board, for as much the increase in the weight of the board and the less strong fixation can harm the performance and the safety in the use. The advantage regarding the fixation by collage that the "fin box" brings, of making possible the removal in cases of substitution for repairs or transport, is, therefore, theoretical, because it's complex structure turns such mobility of difficult adoption.

(iii) The arrangement installed inside the board that allows the more facilitated removal, although a great progress, doesn't also satisfy the needs of fittingness to the conditions of the sea and of the apprentice of the sport.

(iv) What is the most advanced in the technique state is the arrangement accommodation inside the board that, besides allowing the removal and insert of the fin, it possesses longitudinal fitting to receive the member of fixation of the fin through the end of the prow or stem in relation to the fin for close to the border. Although a notable advantage to the surfers in what refers to the stability, the innovation is still primary in what plays the needs of adjustment of an angle to reduce it drag, the cavitations and that it enlarges the projection and perform maneuvers. In order to solve the mentioned problem, was developed the present Utility Model of constructive disposition of adjustment in the removable lateral fins of surfboard that, besides conserve the removable fins and the possibility of the central fin - when of the use of the disposition of three fins - to fit longitudinally, it innovated by providing to the lateral fins multiple angular tuning options to the sides, guaranteeing, finally, to the surfers the possibility to adapt the surfboards to their own ability degree in the surf practice, as well as to the marine conditions, without for so be compelled to use different types of boards. DISCLOSURE OF INVENTION

The subject becomes perfectly understood in the following description, containing references to the indicative numbers at the enclosed graphic representations, evidencing the main characteristics:

Figure 1 - Plan view of the fitting cup of lateral fins, allowing observe opening or graduate incision for specific fitting to the lateral fin;

Figure 2 - Lateral view of the outside face of the lateral fitting cup that it is addressed to the inside of the board;

Figure 3 - Lateral view of the outside face of the lateral fitting cup that it is addressed to the outside of the board; Figure 4 - Frontal outside view of the fitting cup;

Figure 5 -Lateral views of lateral fin and lateral fitting cup, showing how to fit in;

Figure 6 - Sectional lateral view fit the fin in at the lateral fitting cup;

Figure 7 - Plan view of lateral fin in the fitting positioned in the graduate tuning rifts to the left or turn aside exterior of the surfboard;

Figure 8 - Plan view of the lateral fin juxtaposed in the fitting cup, allowing observe the fin base in the fitting in the graduate rift at central position; Figure 9 - Plan view the lateral fin in the fitting positioned in the graduate tuning rifts to the right or turn aside interior of the surfboard;

Figure 10 - Perspective view of the fitting cup;

Figure 11 - Plan view of the tail portion of a surfboard, evidencing the positioning of the lateral fins related to the central fin;

Regarding above illustrations, the constructive disposition of adjustment of the removable lateral fins in surfboard is composed by the surfboard fin (2) with specific base (5) set, juxtaposed to the fitting cup (1), endowed with opening or incision (3), that possesses in tip front graduate rifts (4), which will address the fin to the user's need.

The fitting cup (1) is built-in inside the surfboard tail portion (16), and it is produced in plastic or similar material, of equal or superior lightness and resistance. It is characterized by possessing middle opening or incision (3) in which in it back tip there is a semi-circumference (5), from where fit in the posterior tip (13) of the fin's (2) base (6), that it is rounded; and in the front tip of the middle opening or incision (3) is endowed of graduate rifts (4) that allow, preferentially, three degrees of direction of the fin (2) fastened by the front tip (12) of the fin's (2) base (6), that it is triangular sharp, influencing in the performance of the surfboard. The graduate positioning of the fin's (2) base (6) front tip (12) to the fitting cup's (1) graduate rifts (4) happens with bearings of the fin's (2) base (6) posterior tip (13) over the semi-circumference (5) of the fitting cup's (1) back tip.

The fin (2) is juxtaposed to the fitting cup (1) by the fixation of the edge (7), that blunts from the lateral of the fin's (2) base (6), to the void accommodation space (8), through a flat head screw (9) that passes in the duct (10) existent in the lateral edge (7) and attaches on the spiraled hole (11), horizontality to the center fitting cup (1), close to the inside lateral face of the opening or incision (3). There is a small parallelepiped saliency (15) centered longitudinally to the vertical inside lateral face between the middle opening or incision (3) and the edge's (7) void accommodation space (8), in the same alignment of the small spiraled hole, this saliency (15) aids in the fitting of the fin's (2) base (6), accommodating the reentrance (14) of the fin's (2) base (6), a little superiors dimensions to that, vertically disposed in the inferior extremity of the lateral edge (7).

The exhibit attributes allow to catalog the constructive disposition of adjustment of the removable lateral fins in surfboard as a totally efficient and practical way for several types of users application that needs a accurate, security and versatile conditional of multiple surfboard lateral fins' (2) tuning accomplishing (attack angles), because it allows the manual packaging of lateral fin (2) to the fitting cup (1) in the surfboard by the surfer before the practice of the sport.

Claims

CLAIMS "CONSTRUCTIVE DISPOSITION OF ADJUSTMENT OF THE REMOVABLE LATERAL FINS IN SURFBOARD " central fin parallel and equidistant disposed on tail portion of surfboard, characterized by fitting cup (1), with opening or

\ incision (3) that is endowed in tip front of graduate rifts (4) and in the back tip by a semi-circumferential (5) that limp lateral fin's (2) base (6) by means of posterior tip (13); lateral fin (2), with bearing base (6) in the posterior tip (13) and of graduate tuning in the front tip (12) for fitting in one of the graduate rifts (4) disposed in fitting cup (1); edge (7) disposed in the lateral of the fin's (2) base (6) endowed with passage duct (10) of a flat head screw (9) for fasten the fin (2) to the spiraled hole (11) on the fitting cup (1).