US3032787A - Swimming-flipper with staged propulsion-surfaces - Google Patents

Swimming-flipper with staged propulsion-surfaces Download PDF

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Publication number
US3032787A
US3032787A US97056A US9705661A US3032787A US 3032787 A US3032787 A US 3032787A US 97056 A US97056 A US 97056A US 9705661 A US9705661 A US 9705661A US 3032787 A US3032787 A US 3032787A
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US
United States
Prior art keywords
propulsion
flipper
swimming
staged
shoe
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.)
Expired - Lifetime
Application number
US97056A
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English (en)
Inventor
Mazzella Nicolas
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Individual
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Individual
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Publication date
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Publication of US3032787A publication Critical patent/US3032787A/en
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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

  • Swimmingflippers generally consist of a surface which forms a prolongation of the shoe-part in a continuous plane, having either an inclination or a flexibility enabling it to undergo deformation.
  • the purpose of the invention is to provide a swimmingflipper which increases the propulsive elfect while at the same time reducing the fatigue to which the user is subjected, recuperating some of the energy expended by the swimmer when the latter moves his legs to and fro or performs swimming-movements.
  • FIG. 1 shows a longitudinal section of the flipper.
  • FIGS. 2 and 3 are a plan View and a view in perspective of the same device.
  • FIGS. 4 and 5 are schematic diagrams of the operation of the device, shown in the usual inverted position as required by a swimmer swimming face-downwards.
  • the flipper shown in FIGS. 1, 2 and 3 consists of a shoe-part 1 and two lateral ribs 2 and 3, forming the framework.
  • These ribs have an end-profile 4, 5, which, being suitably curved and distinctly oblique, ensure a difierence of level.
  • the shoe-part is prolonged in the form of a propulsionsurface 6 of the traditional type with a free escape-edge 7.
  • a second propulsion portion 8 with leading escapement edge 9, is attached to the ribs in the lower plane, and constitutes one stage characterising the invention.
  • the positioning is effected at a certain distance and at a suitable angle.
  • staged flipper The principle of the staged flipper is based on the recuperation of part of the propulsive force developed and lost after its brief action at the escape-edge.
  • the second propulsion portion 8 owing to its shape, constitutes a hydrodynamic device of great efficiency, limiting the swimmers effort to the maximum during his ascent, while at the same time giving this movement a propulsive effect equally eificient to that performed on the descent.
  • this flipper is used, for example, for a certain swimming-movement, a descending motor-motion is carried out in the direction shown by the arrow A.
  • the dotted line in FIGS. 4 and 5 represents the front of the swimmers leg.
  • the liquid thrust away in the direction shown by the arrow C uses its live force on the surface 8, which recuperates the streams D, E, increasing the propulsive force.
  • the thrust F recuperates the stream shown by the arrow G, which acts on the leading escapement edge 9 and the trailing escapement edge 10.
  • this second propulsion portion 8 enables some of the lost propulsive force to be recuperated at the main escape-edge 7, while in all existing types of flipper this force is wasted.
  • the hollowed-out part between the stages eliminates the resistances, at the same time utilising the resulting deflection of the stream of Water and the resulting turbulence for propelling the user forward, so that the surfaces are thus utilised in their entirety for propulsion-purposes.
  • the flexibility of the staged surfaces may differ and orifices may be provided, as well as hollowed-out parts in certain positions.
  • a swimmers flipper of resilient material comprising a shoe portion, two lateral reinforcing ribs disposed longitudinally one at each side of the shoe portion and extending forwardly of the shoe portion at one end, a first propulsion portion forming a forward extension of the shoe portion supported between the two ribs and having a forward escapement edge, and a second propulsion portion secured on the forward ends of the two ribs and spaced forwardly of and below the first propulsion portion, said second propulsion portion having leading and trailing escapement edges.
  • a swimmers flipper of resilient material comprising a shoe portion, two curved lateral reinforcement ribs disposed longitudinally one at each side of the shoe portion and extending forwardly of the shoe portion and below said shoe portion, a first propulsion portion forming a forward extension of the shoe portion supported at its sides by being made integral with the two ribs and being downwardly curved and terminating forwardly in an escapement edge, and a second propulsion portion secured at the lower forward ends of the two ribs so as to be spaced forwardly of and below the first propulsion portion, said second propulsion portion having leading and trailing escapement edges.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Toys (AREA)
  • Purses, Travelling Bags, Baskets, Or Suitcases (AREA)
US97056A 1960-03-25 1961-03-20 Swimming-flipper with staged propulsion-surfaces Expired - Lifetime US3032787A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR18814A FR1252976A (fr) 1960-03-25 1960-03-25 Palme de natation à surfaces propulsives étagées

Publications (1)

Publication Number Publication Date
US3032787A true US3032787A (en) 1962-05-08

Family

ID=8580211

Family Applications (1)

Application Number Title Priority Date Filing Date
US97056A Expired - Lifetime US3032787A (en) 1960-03-25 1961-03-20 Swimming-flipper with staged propulsion-surfaces

Country Status (5)

Country Link
US (1) US3032787A (de)
DE (1) DE1202693B (de)
ES (1) ES266028A1 (de)
FR (1) FR1252976A (de)
GB (1) GB926510A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3183529A (en) * 1964-03-16 1965-05-18 Beuchat Georges Swimmer's foot-fin with thrust-accelerating device
US3649979A (en) * 1970-06-15 1972-03-21 U S Divers Co Swim fin
FR2423237A1 (fr) * 1978-04-19 1979-11-16 Beuchat Georges Palme de natation a inclinaison de voilure variable
US4895537A (en) * 1989-01-27 1990-01-23 Ciccotelli Stephen S Swim fin
US20040029465A1 (en) * 2002-08-06 2004-02-12 Landel Technology, Inc. Swim training fin
US20050026519A1 (en) * 2003-08-01 2005-02-03 Chia-Te Hu Diving fins

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2889563A (en) * 1956-02-27 1959-06-09 Edward W Lamb Swim flipper
FR1191704A (fr) * 1958-02-19 1959-10-21 Palmes articulées pour la natation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3183529A (en) * 1964-03-16 1965-05-18 Beuchat Georges Swimmer's foot-fin with thrust-accelerating device
US3649979A (en) * 1970-06-15 1972-03-21 U S Divers Co Swim fin
FR2423237A1 (fr) * 1978-04-19 1979-11-16 Beuchat Georges Palme de natation a inclinaison de voilure variable
US4895537A (en) * 1989-01-27 1990-01-23 Ciccotelli Stephen S Swim fin
US20040029465A1 (en) * 2002-08-06 2004-02-12 Landel Technology, Inc. Swim training fin
US6979241B2 (en) * 2002-08-06 2005-12-27 Zoomers Swim training fin
US20050026519A1 (en) * 2003-08-01 2005-02-03 Chia-Te Hu Diving fins
US6884135B2 (en) * 2003-08-01 2005-04-26 Chia-Te Hu Diving fins

Also Published As

Publication number Publication date
GB926510A (en) 1963-05-22
DE1202693B (de) 1965-10-07
FR1252976A (fr) 1961-02-03
ES266028A1 (es) 1961-08-01

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