US2729832A - Swimming fin - Google Patents

Swimming fin Download PDF

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Publication number
US2729832A
US2729832A US338824A US33882453A US2729832A US 2729832 A US2729832 A US 2729832A US 338824 A US338824 A US 338824A US 33882453 A US33882453 A US 33882453A US 2729832 A US2729832 A US 2729832A
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US
United States
Prior art keywords
fin
blade
foot
ribs
swimming
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
US338824A
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English (en)
Inventor
Schmitz Walter
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2729832A publication Critical patent/US2729832A/en
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Expired - Lifetime 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
    • 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
    • A63B2031/115—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 with blade at an angle to the plane of the foot when in use, e.g. to reduce plantar flexion

Definitions

  • the invention relates to a swinnning fin as a driving means for swimming objects, preferably for attachment to the feet of swimmers or the like.
  • the invention has for its object a swimming and propulsive fin as a driving means which considerably facilitates the process of swimming.
  • the essential feature of the invention consists therein that the fin blade is angularly arranged towards the front part and dowm. wards.
  • the angular arrangement may preferably be provided under an angle ofabout 25-50 with the plane of the sole of the foot. it has been seen that considerably better results may be obtained in swimming with the aid of the fin according to the invention than with the usual fins.
  • the fin according to the invention does not form as until now an elongation of the plane of the sole of the foot, but forms in swimming an elongation of the leg and with that of the whole body. Merely the short piece of the foot in its normal position does not conform to the direction of movement.
  • the fin besides giving the fin blade an appropriate position in the water in the longitudinal axis of the body, shall also enable the bearer of the same to walk or stand, it appears to be suitable to provide the angularly arranged fin blade in a middle position on the foot so that the protruding toes do not hinder too much the stream of water.
  • the axis of the fin blade advantageously lies within the range between the ball and the middle of the foot.
  • the foot support or shoe-like member of the fin and the n blade is p e b y ar a ge tow rds, the. rom a. s re p r v block p nv whi h may r s he. toes... A.
  • sw mming fin including flje toes may be manufactured as a, l s r bber hoe wh ch may nc ose, h l of. he. from. part of the foot when standing on tiptoe. It may alsobe chosen an open structure leaving free the toes. but the front part of the foot shall essentially assist the, effect of the fins and for this reason the angular arrange,- ment of the fin blade beneath the ball. of the foot is the best.
  • the fin blade may extend symmetrically. to. the foot. But it is also possible that the tin blade extends un; ym c lly to e ng udina a o he. t ot, hat means extends towards one side. This oblique posi; tion of the fin blade is. advantageous in so far as in crawling the feet may be held closely tOgQther Without the fin blades disturbing one another.
  • the fin according to the invention is preferably made from rubber and may or may not, be provided with a stiflFener.
  • the fin blade is suitably provided with a plurality of longitudinal ribs converging towards the free; end of the fin.
  • the ribs may be arranged on. one, side or on both sides of the fin blade. Further the ribs may have diminishing strength and height towards the mid; dle, line of the fin blade to increase the elasticity of the fin simultaneously with the corresponding effect of the. ribs.
  • the fin blade By providing the fin blade with ribs, gradually cont. verging towards the free end, it is obtained that in actuating the fin the stream of water striking against the. fin blade is divided into bands and that these bands are pressed together. Thereby the fin blade PIQdlJQQS. SO- called solid Water bands and presses them during the snake-like up and down movement so, that strong re; actionary effects result.
  • the shoe-like member of the fin receiving the front part of the foot is preferably pro.-. vided witha broad elastic. ban which surrounds the, tendon of Achilles above the heel. Further the, shoe-.. like member of the fin may be divided on the instep a d tied. up. y means of strin s or the. like.
  • Fig; l is a side el'evational view of the swimming fin with the shoe-like portion thereof mounted on the foot of a user, the normal position of the fin being substantially parallel with the longitudinal axis of the leg as shown in full lines, with movements shown by dotted lines,
  • Fig. 2 is a top plan view showing ribs extending lengthwise of the fin blade and converging toward the free end thereof, with the fin blade symmetrical to the shoe-like portion,
  • Fig. 3 is a cross-sectional view taken on line 33 of Fig. 2, showing the longitudinally extending ribs prog'ecting from opposite sides of the fin blade,
  • Figs. 3a and 312 show the fin blade flexible in opposite directions
  • Fig. 4 is a top plan view of a modified construction, showing the fin-like blade projecting forwardly and laterally of the shoe-like portion and with a lacing closure for the shoe-like portion,
  • Fig. 5 is a cross-sectional view taken on line 5-5 of Fig. 4, showing the longitudinal ribs at the side marginal edges of the fin-like blade being of increased height with the ribs decreasing in height toward the longitudinal axis of the fin like blade, and
  • Fig. 6 is a top plan view of another form of the finlike blade similar to Fig. 2 with parallel oblique cross ribs between the longitudinally extending ribs.
  • the fin according to the invention essentially consists of a shoe-like member 1 receiving the foot 2 and of a fin blade 3. According to the invention the fin blade extends in the elongation of the leg if the foot is only somewhat stretched, that is if the foot is stretched in a comfortable manner.
  • the angle included with the sole surface of the foot may amount to about 25-50.
  • the fin blade 3 which essentially may be formed like a paddle is provided with longitudinal ribs 4 on opposite faces converging towards the free end of the fin blade. In this manner the stream of water passing along the fin blade is seized and guided between two ribs at a time. The constant reduction of the space between the ribs results in pressing together the stream of water. By moving the fin forwards and backwards, thereby can be produced so-called solid water bands aiding the prepulsive effort.
  • a more or less plastic block 5 from rubber or the like to provide a positive support for the foot in the whole range from the ball down to the toes. If the outer ribs 4 are made very thick or. higher as shown in Fig.
  • a fin blade is obtained which may be given a hollow shape dependent on the movement of the blade, whereby an increase of the solid water bands may be obtained.
  • the elastic yielding of the centre of the paddle results in a curved pressure acting upon the encountered water.
  • Between the ribs 4 may be provided further angular ribs 8 extending like fish-bones towards the centre as shown in Fig. 6.
  • Fig. 4 shows a swimming fin with a fin blade 6 which extends unsymmetrically, or towards one side with respect to the longitudinal axis of the foot and has the angular arrangement of ribs according to Fig. 1.
  • the axis of the fin blade 6 may be arranged under different angles with respect to the longitudinal axis of the foot or of the shoe-like member 1 of the fin respectively.
  • the shoe-like member 1 as shown in Fig. 4 may be split at the top with the sections secured together by a lacing 7.
  • a swimming fin comprising a shoe-like member having an open toe portion adapted to be attached to a foot of the user, a flexible fin blade extending outwardly from the bottom of the shoe-like member in proximity to the open toe portion and lying wholly within the forward half portion of the shoe-like member, the angularity of the fin blade relative to the plane of the bottom of the shoe-like member being in the range of 25 to 50 with the point of intersection of the planes of the fin blade and bottom of the shoe-like member lying above the bottom of the shoe-like member and said fin blade normally occupying a position in a plane substantially parallel with the longitudinal axis of the leg of the user.
  • a swimming fin as in claim 1, wherein the tin blade has a plurality of longitudinal ribs on opposite faces thereof converging towards the free end of the blade to increase the propulsive force of the fin, and spaced ribs between the aforesaid ribs arranged at an angle to the longitudinal axes of the longitudinal ribs.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
US338824A 1952-02-28 1953-02-25 Swimming fin Expired - Lifetime US2729832A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DESCH8911A DE1031694B (de) 1952-02-28 1952-02-28 Schwimmflosse

Publications (1)

Publication Number Publication Date
US2729832A true US2729832A (en) 1956-01-10

Family

ID=7425930

Family Applications (1)

Application Number Title Priority Date Filing Date
US338824A Expired - Lifetime US2729832A (en) 1952-02-28 1953-02-25 Swimming fin

Country Status (6)

Country Link
US (1) US2729832A (fr)
BE (1) BE518015A (fr)
DE (1) DE1031694B (fr)
FR (1) FR1085759A (fr)
GB (1) GB731198A (fr)
NL (2) NL176430B (fr)

Cited By (21)

* 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
US3019458A (en) * 1957-12-03 1962-02-06 Barbieri Ettore De Spoon-shaped swim-fin
US3068499A (en) * 1958-01-14 1962-12-18 Biskupsky Wassily Von Foot fins
US3256540A (en) * 1963-04-04 1966-06-21 Novelli Alberto Device for surface and subaquatic swimming
US4025977A (en) * 1975-09-12 1977-05-31 U. S. Divers Co. Angular foot fin
FR2638367A1 (fr) * 1988-10-28 1990-05-04 Mat Mas Srl Monopalme pour la natation
US4934971A (en) * 1988-10-31 1990-06-19 Picken James B Swim fin
US4981454A (en) * 1989-02-01 1991-01-01 Klein Kevin R Retractable swim fin
US5108327A (en) * 1989-02-01 1992-04-28 Klein Kevin R Retractable swim fin
US5326296A (en) * 1993-03-04 1994-07-05 Jesus Juan J De Swimmers aid
US5899781A (en) * 1997-11-07 1999-05-04 Mclaughlin; Matthew M. Swim fin incorporating pronation compensation structure
US6086440A (en) * 1999-01-11 2000-07-11 Fechtner; Ryszard Swim fin and monofin with flapping foil
US6568973B2 (en) * 2000-02-25 2003-05-27 Salvas Sub S.P.A. Swim or dive fin
US20040209534A1 (en) * 2003-04-17 2004-10-21 Graham Richard W. Swim fin with fabric foot pocket
EP1591146A1 (fr) * 2004-04-30 2005-11-02 C4 S.A.S. DI MARCO BONFANTI & C. Palme de plongée
US20060089066A1 (en) * 2002-08-26 2006-04-27 Giles Wilson Swimming aid
US20060258238A1 (en) * 2003-10-24 2006-11-16 Mingarro Traver Ramon J Ergonomical flippers for swimming or diving
AU2003254391B2 (en) * 2002-08-26 2009-04-02 Giles Wilson A swimming aid
US8480446B2 (en) 2010-11-04 2013-07-09 David W Woods High efficiency swim fin using multiple high aspect ratio hydrodynamic vanes with pliable hinges and rotation limiters
US8926385B1 (en) 2009-11-02 2015-01-06 David Woods High efficiency swim fin using multiple high aspect ratio hydrodynamic vanes with pliable hinges and rotation limiters
US9004966B2 (en) 2011-10-05 2015-04-14 Brian Mayer Swim fin attachment

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2423571A (en) * 1944-12-20 1947-07-08 Charles H Wilen Swimming tail
USRE23006E (en) * 1948-06-15 Swim fin

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE460045A (fr) * 1940-09-27
BE465909A (fr) * 1945-06-28

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE23006E (en) * 1948-06-15 Swim fin
US2423571A (en) * 1944-12-20 1947-07-08 Charles H Wilen Swimming tail

Cited By (24)

* 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
US3019458A (en) * 1957-12-03 1962-02-06 Barbieri Ettore De Spoon-shaped swim-fin
US3068499A (en) * 1958-01-14 1962-12-18 Biskupsky Wassily Von Foot fins
US3256540A (en) * 1963-04-04 1966-06-21 Novelli Alberto Device for surface and subaquatic swimming
US4025977A (en) * 1975-09-12 1977-05-31 U. S. Divers Co. Angular foot fin
FR2638367A1 (fr) * 1988-10-28 1990-05-04 Mat Mas Srl Monopalme pour la natation
US4934971A (en) * 1988-10-31 1990-06-19 Picken James B Swim fin
US4981454A (en) * 1989-02-01 1991-01-01 Klein Kevin R Retractable swim fin
US5108327A (en) * 1989-02-01 1992-04-28 Klein Kevin R Retractable swim fin
US5326296A (en) * 1993-03-04 1994-07-05 Jesus Juan J De Swimmers aid
US5899781A (en) * 1997-11-07 1999-05-04 Mclaughlin; Matthew M. Swim fin incorporating pronation compensation structure
WO1999024123A1 (fr) * 1997-11-07 1999-05-20 Mclaughlin Matthew M Palme incorporant une structure de compensation de pronation
AU738259B2 (en) * 1997-11-07 2001-09-13 Matthew M. Mclaughlin Swim fin incorporating pronation compensation structure
US6086440A (en) * 1999-01-11 2000-07-11 Fechtner; Ryszard Swim fin and monofin with flapping foil
US6568973B2 (en) * 2000-02-25 2003-05-27 Salvas Sub S.P.A. Swim or dive fin
US20060089066A1 (en) * 2002-08-26 2006-04-27 Giles Wilson Swimming aid
US7166004B2 (en) * 2002-08-26 2007-01-23 Giles Wilson Swimming aid
AU2003254391B2 (en) * 2002-08-26 2009-04-02 Giles Wilson A swimming aid
US20040209534A1 (en) * 2003-04-17 2004-10-21 Graham Richard W. Swim fin with fabric foot pocket
US20060258238A1 (en) * 2003-10-24 2006-11-16 Mingarro Traver Ramon J Ergonomical flippers for swimming or diving
EP1591146A1 (fr) * 2004-04-30 2005-11-02 C4 S.A.S. DI MARCO BONFANTI & C. Palme de plongée
US8926385B1 (en) 2009-11-02 2015-01-06 David Woods High efficiency swim fin using multiple high aspect ratio hydrodynamic vanes with pliable hinges and rotation limiters
US8480446B2 (en) 2010-11-04 2013-07-09 David W Woods High efficiency swim fin using multiple high aspect ratio hydrodynamic vanes with pliable hinges and rotation limiters
US9004966B2 (en) 2011-10-05 2015-04-14 Brian Mayer Swim fin attachment

Also Published As

Publication number Publication date
NL85632C (fr)
GB731198A (en) 1955-06-01
FR1085759A (fr) 1955-02-07
NL176430B (nl)
DE1031694B (de) 1958-06-04
BE518015A (fr)

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