EP0063666A1 - Palme de natation - Google Patents

Palme de natation Download PDF

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Publication number
EP0063666A1
EP0063666A1 EP81430042A EP81430042A EP0063666A1 EP 0063666 A1 EP0063666 A1 EP 0063666A1 EP 81430042 A EP81430042 A EP 81430042A EP 81430042 A EP81430042 A EP 81430042A EP 0063666 A1 EP0063666 A1 EP 0063666A1
Authority
EP
European Patent Office
Prior art keywords
swimming
leg
leg extension
palm
extension
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP81430042A
Other languages
German (de)
English (en)
French (fr)
Inventor
Nicolas Mazzella
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mediterranee Jet Corse (societe A Responsabilite Limitee)
Original Assignee
Mediterranee Jet Corse (societe A Responsabilite Limitee)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mediterranee Jet Corse (societe A Responsabilite Limitee) filed Critical Mediterranee Jet Corse (societe A Responsabilite Limitee)
Publication of EP0063666A1 publication Critical patent/EP0063666A1/fr
Ceased legal-status Critical Current

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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 of the kind that is commonly used by divers or swimmers in order to facilitate swimming and increase the speed of movement.
  • Conventional swimming fins have, generally, as shown in FIG. 1, a foot pocket 1 intended for housing the foot, a blade 2 starting from the ankle and extending the foot outwards, two or more of two lateral ribs 3 with which said wing is provided, which give a certain rigidity to said fin while making it possible to channel, in the direction of the trailing edge 4, the water vein or veins generated by the swings of the swimmer's legs and ensuring propulsion.
  • the hydrodynamic efficiency of such fins is in particular a function of the length of their wing, the value of the propulsive effect increasing with an increase in the length of the latter.
  • the leg only fulfills the function of a force-transmitting lever and does not participate in the hydrodynamic action ensuring the propulsion which results solely from the sliding of the or water streaks on the surface of the blade from the end of the foot to the trailing edge (arrows in Figure 6).
  • the non-participation of the leg in the propelling effect of the fins constitutes a loss of energy and reduces their performance, not only because of the resistance to penetration encountered during the flapping, but also because of the braking phenomenon resulting from the turbulence. generated at the instep.
  • said anterior face of the boot has a convex surface enveloping the front of the leg, which, during the movement of advancement of the latter, divides the water into two veins which flow laterally and meet when they reach the end of the foot by creating a whirlpool or swirl at the upper part of the fin of the palm, which also counteracts the good sliding of the water on the upper surface of said fin.
  • the back of the boot puts pressure on the calf muscles which cannot function normally, which accelerates the onset of fatigue and can cause painful and dangerous cramps.
  • the object of the present invention is in particular to remedy the abovementioned drawbacks or shortcomings of traditional swimming fins and to increase their hydrodynamic efficiency.
  • the invention aims to considerably increase the length of the airfoil and the size of the propulsive surface without this implying a progression towards a critical threshold.
  • the swimming palm according to the invention is remarkable in that it includes a leg extension rising above the instep and the front face of which has a smooth and continuous propelling surface arranged in line with the propelling surface of the wing,
  • the propelling surface of the leg extension has a flat or concave cross section.
  • An advantage provided by this embodiment is that it has a better hydrodynamic yield than that of traditional fins or that of the special fins offered to date in an attempt to solve various problems.
  • the activation of the water molecules generating the propulsive effect takes place from below the knee.
  • the lever arm and the propulsive surface are thus considerably elongated, which allows the displacement of a greater mass for a less effort.
  • the swimming palm according to the invention erases all the usual reliefs of the foot pocket and, in particular, the tightening loops, to offer a uniform and continuous propelling surface, without braking or disturbances. , which are, in part, responsible for energy losses.
  • Another advantage offered by the present invention is that the ankle and the instep of the user are much less stressed than with a traditional palm, which translates, for the swimmer, by less muscular fatigue and by a significant saving of physical means.
  • Another subsidiary advantage of the claimed swimming fin is that it allows protection of the tibia, which is very appreciable in certain cases of use in industrial diving.
  • This palm is made of any suitable flexible or flexible material such as rubber, synthetic elastomer or other plastic material, fiberglass, etc., or in a combination of these materials or any other suitable materials.
  • it comprises a foot pocket 5 and a blade 6 extending beyond the closed end of said foot pocket and ending with a trailing edge 7.
  • the upper face of this blade is provided with two or more two ribs and, for example, two lateral ribs 8 delimiting a central propelling surface 9 flat or ribbed and of increasing width towards the trailing edge.
  • the swimming palm has a leg extension 10 rising above the instep 11 and the front face of which is provided with two or more two ribs or nets 12 arranged in the extension of the ribs lateral 8 of the wing, so as to form two or more of two continuous ribs 12-8 extending from the upper end or in the vicinity of the upper end of said leg extension to the free end of said wing or to near said free end.
  • the leg extension of the swimming palm comprises, for example, two lateral ribs 12 arranged in the extension of the ribs 8 of the airfoil and delimiting a central propulsive surface 13 smooth and continuous or with no solution of continuity rising above the neck -of the foot 11, towards the knee, and located in the extension of the propelling surface 9 of said wing.
  • the actual wing 6 and the leg extension 10 formed in one piece constitute a very long wing having a large, uniform and continuous propelling surface 13-9 going from the upper end of said leg extension to the edge. 7.
  • the propelling surface 13 of the leg extension preferably has, over its entire length, a straight or flat cross section, as shown, in particular in FIGS. 3 and 4. However, said propelling surface could also have a slightly concave cross section .
  • the united, flat and continuous propulsive surface of the leg extension 10 is disposed in front of the front part of the leg without wrapping said part when the palm is positioned on the latter, as can be seen on the figure 6.
  • the rear face of the leg extension is provided with a longitudinal groove 14 (FIG. 3) for housing the part front of the user's leg to which it can be fixed using two suitable fastening systems, for example by means of two quick-opening straps 15 and 16 remote from each other and one of which is arranged above and the other below the calf which remains free and is therefore not subject to muscular stress during swimming movements.
  • the length of the leg extension 10 and of the propelling surface which is provided with the latter is provided to cover the entire leg of the user, from the knee to the instep.
  • the center of gravity of the swimming fin according to the invention is located towards the bottom of the leg extension.
  • the center of gravity of the swimming fin according to the invention allows the recovery and the maximum use of the muscular energy of the instep, the calf, the thigh and the hip, allowing, therefore, the action, without great efforts, of a wing whose surface and the propulsive effect are considerable compared to what allows a swimming fin of traditional type.
  • the pivoting of the palm is ensured by the knee ( Figure 7) more able to support this kind of effort.
  • the complete airfoil constituted by the actual airfoil and the leg extension may comprise more than two continuous longitudinal ribs 12-8 delimiting two or more of two longitudinal channels constituting as many smooth and continuous propulsive surfaces.
  • the channel or channels delimited by these ribs can or can lead to the entry of one or more thrust acceleration conduits opening on the upper face of the wing proper 6 and opening on the lower face of the latter, the execution of such thrust acceleration conduits being known per se.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Toys (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
EP81430042A 1981-04-24 1981-12-03 Palme de natation Ceased EP0063666A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8108387A FR2504397B1 (fr) 1981-04-24 1981-04-24 Palme de natation
FR8108387 1981-04-24

Publications (1)

Publication Number Publication Date
EP0063666A1 true EP0063666A1 (fr) 1982-11-03

Family

ID=9257835

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81430042A Ceased EP0063666A1 (fr) 1981-04-24 1981-12-03 Palme de natation

Country Status (3)

Country Link
EP (1) EP0063666A1 (es)
ES (1) ES264661Y (es)
FR (1) FR2504397B1 (es)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2676001A1 (fr) * 1991-05-02 1992-11-06 Brunet Jean Palme a chausson de maintient.
EP0819450A1 (en) * 1996-07-17 1998-01-21 Toan-Dat Tran Swim-shoes for diver or swimmer
KR100375775B1 (ko) * 1999-07-16 2003-03-15 박완기 일방날개 부츠 휜
FR2930451A1 (fr) * 2008-04-25 2009-10-30 Gerard Quilliou Chausson d'une palme de natation permettant de canaliser l'eau depuis le haut du coup de pied jusqu'au bas de la voilure
US8632372B2 (en) 2010-03-02 2014-01-21 Norbert Fleck Swimming device for a swimmer or diver

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3239857A (en) * 1964-04-06 1966-03-15 Frederick H Gwynne Swim fin
FR2172599A5 (es) * 1972-02-15 1973-09-28 Weigele Roger
FR2202441A5 (es) * 1972-10-05 1974-05-03 Hennebutte Georges
FR2242118A1 (en) * 1973-08-29 1975-03-28 Endress Philippe Swimming flipper with boot and webbed blade - the two parts are formed as an integral moulding or are permanently joined

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3239857A (en) * 1964-04-06 1966-03-15 Frederick H Gwynne Swim fin
FR2172599A5 (es) * 1972-02-15 1973-09-28 Weigele Roger
FR2202441A5 (es) * 1972-10-05 1974-05-03 Hennebutte Georges
FR2242118A1 (en) * 1973-08-29 1975-03-28 Endress Philippe Swimming flipper with boot and webbed blade - the two parts are formed as an integral moulding or are permanently joined

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2676001A1 (fr) * 1991-05-02 1992-11-06 Brunet Jean Palme a chausson de maintient.
EP0819450A1 (en) * 1996-07-17 1998-01-21 Toan-Dat Tran Swim-shoes for diver or swimmer
KR100375775B1 (ko) * 1999-07-16 2003-03-15 박완기 일방날개 부츠 휜
FR2930451A1 (fr) * 2008-04-25 2009-10-30 Gerard Quilliou Chausson d'une palme de natation permettant de canaliser l'eau depuis le haut du coup de pied jusqu'au bas de la voilure
US8632372B2 (en) 2010-03-02 2014-01-21 Norbert Fleck Swimming device for a swimmer or diver

Also Published As

Publication number Publication date
FR2504397B1 (fr) 1985-07-05
ES264661Y (es) 1983-07-01
ES264661U (es) 1982-11-16
FR2504397A1 (fr) 1982-10-29

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE GB IT LU NL SE

17P Request for examination filed

Effective date: 19821203

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19850930

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MAZZELLA, NICOLAS