WO1994009860A1 - Palme de natation - Google Patents
Palme de natation Download PDFInfo
- Publication number
- WO1994009860A1 WO1994009860A1 PCT/FR1993/001061 FR9301061W WO9409860A1 WO 1994009860 A1 WO1994009860 A1 WO 1994009860A1 FR 9301061 W FR9301061 W FR 9301061W WO 9409860 A1 WO9409860 A1 WO 9409860A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- foot
- palm
- palm according
- axis
- sole
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B31/00—Swimming aids
- A63B31/08—Swim fins, flippers or other swimming aids held by, or attachable to, the hands, arms, feet or legs
- A63B31/10—Swim fins, flippers or other swimming aids held by, or attachable to, the hands, arms, feet or legs held by, or attachable to, the hands or feet
- A63B31/11—Swim fins, flippers or other swimming aids held by, or attachable to, the hands, arms, feet or legs held by, or attachable to, the hands or feet attachable only to the feet
Definitions
- the present invention relates to a swimming fin adapted to the morphology of the user for optimal efficiency during its use.
- swimming fins are usually and, for many years, made up of a heating part comprising a housing for the front part of the foot and a strap passing behind the heel and a blade extending the foot part of the foot towards the 'before and comprising stiffening ribs in particular on each of the side edges of this palm.
- This known device has many drawbacks, in particular with regard to comfort, the foot being trapped in a housing ill-suited to its morphology, and with regard to the power developed during its implementation, the propelling forces. being poorly distributed and inducing parasitic efforts tiring the swimmer.
- the present invention intends to remedy these drawbacks by proposing a swimming fin, the design of which makes its performance in use optimal and much more convenient the evolution out of water.
- the palm according to the invention which has a foot portion extended by a blade located essentially at the front of the foot, is such that the foot part and the wing form a profiled and continuous structure, the section of which by one any of the half-planes passing through an axis located at the front of the foot in the region of the fold of the ankle and substantially perpendicular to the sole of the foot, is substantially triangular, the outer point of this triangle constituting the edge of the Palm.
- the airfoil is limited by an outer edge contained in a plane substantially coincident with that tangent to the sole of the foot in its above-mentioned extension position.
- a wing is thus constructed which extends the line of the swimmer's foot, the outline of the palm being substantially homothetic with that of the foot with a ratio of homothety which will depend on the performance and the conditions of use of the fin.
- the material used for this palm will be a cellular synthetic material whose density will be of the order of 0.3. This arrangement is interesting because the palm has a float function which allows the swimmer to place his leg in the rest position.
- FIG. 1 is a top view of a palm, produced in accordance with the invention.
- FIG. 2 is a schematic sectional view along the line II-II in FIG. 1
- - Figure 3 is a section along line III-III of Figure 1.
- the swimmer's foot 1 is shown in extension, without support.
- the front part of the foot that is to say that located in front of a transverse plane passing through an axis 2 substantially perpendicular to the sole of the foot and located between the ankle and the kick, is housed in the part footwear of the palm which is constituted by a housing 3 formed in the very thickness of the palm, which is not the case with existing fins to date, where the footwear part is generally a housing with a thin and flexible wall conforming to the foot by deformation, extended towards the front of a blade, the housing and the blade being stiffened by lateral ribs (sometimes with an additional rib in the axis of the foot).
- the foot portion and blade constitute a continuous structure of variable thickness from the edge 4 of the palm where it is thin to the axis 2 where its thickness is greatest.
- the palm of the invention can be defined as being of triangular section by any of the front half-planes passing through the axis 2. This section is visible in FIG. 2 where the cutting plane is the one marked II-II in FIG. 1 and in FIG. 3 which is a section along the plane III-III of FIG. 1 and which illustrates the two triangular sections on either side of the axis 2.
- the advantage of this structure lies in the progressive stiffness of the palm according to the invention which varies between a flexible edge 4 and a part 5 surrounding the thicker housing 3 therefore more rigid in the immediate vicinity of the foot.
- the efforts passing between the swimmer's foot and the middle through the palm are much better distributed around the foot than in a conventional palm where they are concentrated at the level of the ribs connecting the blade to the foot portion.
- the profile of the palm is determined so that the upper surface 6 of the palm, for at least its part in front of the axis 2 and around the foot, is substantially parallel to, or confused with a fictitious surface which would form the envelope of line segments 7 originating from a point P located on axis 2 in the vicinity of the attachment of the foot with the ankle at the location of the front fold, a few millimeters or even a centimeter from the skin, each segment also being tangent to the outer surface of the forefoot.
- the upper surface 6 of the palm therefore kills an extension of the upper surface of the foot of generally convex shape.
- This extension can be limited by the intersection of the airfoil with a plane 8 which is substantially tangent to the sole of the foot when the latter is in extension as shown in FIG. 2 and whose trace in a "radial" plane. constitutes one of the sides of the triangular section described above.
- the intersection of the surface 6 and the plane 8 defines the edge 4 of the palm, this edge being substantially homothetic with the projection of the outline of the foot in the plane 8, in a homothety whose center is the projection of the point P in the plan 8 and whose ratio is approximately 2 for floating fins. In the case, for example, of diving fins, this ratio can be much greater.
- the attachment of the fin according to the invention is ensured by a strap 9, adjustable in length and provided with a buckling means, not shown but known in itself, which is intended to grip the heel of the swimmer.
- This strap 9 is advantageously coupled to the palm by any known means at the opening of the footwear part 3 and practically in the vicinity of the plane 8, that is to say to the lateral lower parts of this opening. It then rises slightly by making an angle of 5 to 20 ° with respect to the plane 8.
- this position of strap attachment very significantly improves the comfort the attachment of the palm to the foot unlike the fasteners known in conventional palms where the strap comes from the lateral median part of the footwear and is supported on a sensitive area of the foot (attachment of the Achilles tendon 5, malleoli external and internal).
- the palm according to the invention can be manufactured by injection into a mold shaped so as to meet the requirements described above, of a synthetic material.
- the advantage of such a material lies in its low density which can be of the order of 0.3, which makes the palm floating.
- the role of palm float is advantageous for the swimmer especially if he uses it for
- the general shape of the palm thus obtained gives it many advantages. Thus, it is possible to obtain a palm with a surface greater than that of conventional palms while having a reduced length.
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU54239/94A AU5423994A (en) | 1992-10-29 | 1993-10-28 | Flipper |
EP93924648A EP0682546A1 (fr) | 1992-10-29 | 1993-10-28 | Palme de natation |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9212954A FR2697437B1 (fr) | 1992-10-29 | 1992-10-29 | Palme de natation. |
FR92/12954 | 1992-10-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994009860A1 true WO1994009860A1 (fr) | 1994-05-11 |
Family
ID=9434989
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1993/001061 WO1994009860A1 (fr) | 1992-10-29 | 1993-10-28 | Palme de natation |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0682546A1 (fr) |
AU (1) | AU5423994A (fr) |
FR (1) | FR2697437B1 (fr) |
WO (1) | WO1994009860A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5975973A (en) * | 1997-06-06 | 1999-11-02 | Sontaria Holdings Pty Ltd. | Swim fin |
EP4135861A4 (fr) * | 2020-04-17 | 2024-04-10 | Sunny Industrial Engineering Co., Ltd. | Nouvelle palme et voilure de palme |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6979241B2 (en) * | 2002-08-06 | 2005-12-27 | Zoomers | Swim training fin |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR997264A (fr) * | 1945-06-28 | 1952-01-03 | Propulseurs et assouplisseurs des pieds pour la natation réalisés en matière d'extensibilité différente en diverses zones | |
FR1190346A (fr) * | 1958-01-22 | 1959-10-12 | Chaussure de natation | |
FR1322734A (fr) * | 1962-05-24 | 1963-03-29 | Dispositif de fixation de sangle de réglage sur palme de natation | |
FR1407485A (fr) * | 1964-09-08 | 1965-07-30 | Peche Sport Sarl Soc | Palme chaussante et réglable |
-
1992
- 1992-10-29 FR FR9212954A patent/FR2697437B1/fr not_active Expired - Fee Related
-
1993
- 1993-10-28 EP EP93924648A patent/EP0682546A1/fr not_active Withdrawn
- 1993-10-28 WO PCT/FR1993/001061 patent/WO1994009860A1/fr not_active Application Discontinuation
- 1993-10-28 AU AU54239/94A patent/AU5423994A/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR997264A (fr) * | 1945-06-28 | 1952-01-03 | Propulseurs et assouplisseurs des pieds pour la natation réalisés en matière d'extensibilité différente en diverses zones | |
FR1190346A (fr) * | 1958-01-22 | 1959-10-12 | Chaussure de natation | |
FR1322734A (fr) * | 1962-05-24 | 1963-03-29 | Dispositif de fixation de sangle de réglage sur palme de natation | |
FR1407485A (fr) * | 1964-09-08 | 1965-07-30 | Peche Sport Sarl Soc | Palme chaussante et réglable |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5975973A (en) * | 1997-06-06 | 1999-11-02 | Sontaria Holdings Pty Ltd. | Swim fin |
EP4135861A4 (fr) * | 2020-04-17 | 2024-04-10 | Sunny Industrial Engineering Co., Ltd. | Nouvelle palme et voilure de palme |
Also Published As
Publication number | Publication date |
---|---|
FR2697437B1 (fr) | 1995-02-10 |
EP0682546A1 (fr) | 1995-11-22 |
FR2697437A1 (fr) | 1994-05-06 |
AU5423994A (en) | 1994-05-24 |
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