EP0884073A2 - Swim fin - Google Patents
Swim fin Download PDFInfo
- Publication number
- EP0884073A2 EP0884073A2 EP98110808A EP98110808A EP0884073A2 EP 0884073 A2 EP0884073 A2 EP 0884073A2 EP 98110808 A EP98110808 A EP 98110808A EP 98110808 A EP98110808 A EP 98110808A EP 0884073 A2 EP0884073 A2 EP 0884073A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- fin
- projection
- footpocket
- central
- 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.)
- Withdrawn
Links
- 239000000463 material Substances 0.000 claims abstract description 45
- 230000002093 peripheral effect Effects 0.000 claims abstract description 27
- 230000000295 complement effect Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000007779 soft material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
Images
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 invention relates to a swim fin, comprising a blade part and a seat for the foot, the so-called footpocket, the blade part consisting of at least two parts, made of different materials.
- the blade made of a substantially stiff material has longitudinal slits, widening towards the free end, which are filled with a generally elastic linking material, such as rubber or similar.
- the two materials forming the blade are both relatively stiff, though having a different stiffness and/or color.
- a first part of the blade, directly connected to the footpocket, has a generally central recess, and a relatively large size with respect to the total surface of the blade.
- the second part of the blade is complementary in shape to the recess in the first part of the blade and is housed in said recess, while being connected to the first part of the blade by chemical-thermal adhesion.
- the blades are too flexible and deformable, or not enough flexible and deformable, or the deformations follow directions which are unfavorable or non-optimal for a correct hydrodynamic behavior.
- the invention has the object to improve a fin of the type described hereinbefore, in a simple and cheap manner, and such as to obtain a better hydrodynamic behavior, closer to perfection.
- the invention achieves the above purposes by providing a fin of the type described hereinbefore, in which the blade has an additional part, which is made of a material being different at least from said second part of the blade.
- the second part of the blade is U- or V-shaped, and delimits a central area of the blade, separating it from the peripheral areas thereof, said second part of the blade being made of an elastically deformable material, such as rubber, or similar.
- the second part of the blade V-shaped insert which surrounds the central area of the blade, may have different widths and is usually a few centimeters large.
- the V shape may be more or less pointed and rounded, from a round arched shape, through an arched spindle-like shape, to a V shape with straight arms, or similar.
- the second part of the blade may be extended up to the end of the blade, thus completely separating the central part of the blade from the first peripheral part, or may terminate at a certain distance from the end of the blade, so that the central area of the blade is connected to the first peripheral part, by two strips of material along the free edge of the blade.
- the second part of the blade and the central part thereof may be made of materials being different from each other and from the first peripheral part of the blade. Particularly, advantages are obtained from combinations, wherein the second part of the blade is different both from the first and from the central one, whereas the central part is made of the same material as the first part of the blade, or of a different material therefrom.
- the second part of the blade has an accordion, i.e. corrugated cross section.
- the blade In the embodiment in which the central part, delimited by the second V-shaped part of the blade, is made of the same material as the first peripheral part of the blade, the blade consists of two different materials, which may be both different from the materials forming the footpocket or the second V-shaped part of the blade may be made of a material which is substantially identical to that of the footpocket.
- the fin obtained therefrom would be composed of a minimum of two and a maximum of three different materials.
- the fin obtained therefrom will be formed by a minimum of three, and a maximum of four different materials.
- the flexibility and deformability properties of the fin are considerably improved, thereby providing an operating behavior which is as close as possible to perfection.
- the blade according to the invention provides optimal hydrodynamic characteristics.
- the fin according to the invention may be fabricated by a multi-injection process, or by inserting preformed members of the first peripheral part of the blade and of the central part thereof in a bi-injection mold, for the footpocket part and for the second part of the blade respectively.
- the invention relates to further characteristics, which form the subject of the dependent claims.
- the fin may be composed of a foot seat, the so-called footpocket 3, and of a blade part 1, having in its central part a U-shaped insert 201, made of a soft material, which has divergent arms, reaching the end of the blade.
- the footpocket 3 is made of a soft material, such as rubber or similar, whereas the blade part 1, connected to the footpocket 3 is of a relatively stiff material, particularly of plastic.
- the U-shaped insert 201 is one to a few centimeters wide, and is made of a material which is different from that of the blade 1, and particularly of the same material as the footpocket 3, such as rubber or similar.
- Said U-shaped insert 201 is connected through chemical-thermal adhesion, from one side to the peripheral part of the blade 101 and from the other side to a stiffer central area 301.
- the stiffer central area 301 may be made of the same material as the peripheral part 101 or in any other material having stiffness or color characteristics differing from those of the peripheral part 101 of the blade and of the U-shaped insert 201.
- This construction allows a perfect deformation of the blade 1: under water thrust, the central part 301, thanks to the higher deformability of the material forming the U-shaped insert 201 is moved and deformed, providing the blade 1 with a spoon shape in both directions, at least as seen in cross section and at least in its central area.
- the fin may be fabricated by multi-injection molding, with the nozzles for the different materials being provided in the different corresponding areas of the mold.
- the single central part 301 and/or the peripheral part 101 of the blade may be made in separate molds, whereon said parts are properly positioned in the injection mold for the molding material/s of the footpocket 3 and/or of the insert 201.
- the U-shaped insert 201 has the additional advantage that it allows higher tolerances in mutually positioning the peripheral part 101 and the central part 301 of the blade, often made of a stiffer material.
- the fin differs from the one shown in fig. 1 in that it has, in its central part, a pointed V-shaped insert 201, which does not reach the end of the blade 1.
- the central part 301 is connected to the peripheral part 101 by two lateral strips 501, made of the same material as the peripheral part 101. Hence, the central part 301 is substantially T-shaped.
- a hollow 2 having a corresponding projection 2' on the rear side, as shown in fig. 3.
- the hollow and the corresponding projection also have a pointed V shape, which is substantially similar to that of the part 201 of the blade.
- the hollow 2 is connected in decreasing depth to the end of the blade 1.
- the central area 301 of the blade has a slightly arched longitudinal projection 401 therein, having a substantially elongated shape in the axial direction of the blade, which has a corresponding step-like recess 401' on the rear side.
- the two lateral ribs 4 and the wide central projection 2' delimit two longitudinal side grooves 5 therein, which terminate at the point of the footpocket in a very deep notch 6.
- Figure 4 is a cross sectional view of the blade 1, at about the middle of its length, with the two lateral ribs 4, the two downflow grooves 5, the second accordion-folded part 201 of the blade made of soft material, the central part of the blade 301, there being emphasized the longitudinal fore projection 401 and the corresponding step-like rear recess 401'.
- the invention is not limited to the embodiments described and illustrated herein, but may be greatly varied, especially as regards construction. So, for example, the different shapes of the second part 201 of the blade may be provided in combination with the example shown in fig. 1 and with that shown in fig. 2.
- the accordion cross section may be also provided in combination with the embodiment shown in fig. 1. The whole without departure from the guiding principle disclosed above and claimed below.
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Toys (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
Abstract
Swim fin comprising a blade part (1) and a seat
for the foot, the so-called footpocket (2), the blade
part (1) consisting of at least two parts, a first and
a second part (101, 201) of the blade, made of
different materials. According to the invention, the
blade has an additional part (301), which is made of a
material being different at least from said second part
of the blade (201). According to an improvement, the
part of the blade (201) is U- or V-shaped and delimits
a central area (301) of the blade, separating it from
the peripheral areas of the blade (101), said second
part (201) of the blade being made of an elastically
deforaable material, such as rubber, or similar.
Description
The invention relates to a swim fin, comprising a
blade part and a seat for the foot, the so-called
footpocket, the blade part consisting of at least two
parts, made of different materials.
Swim fins with blades made of two different
materials are already known. According to a first
embodiment thereof, the blade, made of a substantially
stiff material has longitudinal slits, widening towards
the free end, which are filled with a generally elastic
linking material, such as rubber or similar.
According to a further well-known fin, the two
materials forming the blade are both relatively stiff,
though having a different stiffness and/or color. A
first part of the blade, directly connected to the
footpocket, has a generally central recess, and a
relatively large size with respect to the total surface
of the blade. The second part of the blade is
complementary in shape to the recess in the first part
of the blade and is housed in said recess, while being
connected to the first part of the blade by chemical-thermal
adhesion.
However, these well-known fins, though having
blades of a composite construction, operating better
than traditional fins, cannot provide a perfect
hydrodynamic behavior.
The blades are too flexible and deformable, or not
enough flexible and deformable, or the deformations
follow directions which are unfavorable or non-optimal
for a correct hydrodynamic behavior.
The invention has the object to improve a fin of
the type described hereinbefore, in a simple and cheap
manner, and such as to obtain a better hydrodynamic
behavior, closer to perfection.
The invention achieves the above purposes by
providing a fin of the type described hereinbefore, in
which the blade has an additional part, which is made
of a material being different at least from said second
part of the blade.
According to a preferred embodiment, the second
part of the blade is U- or V-shaped, and delimits a
central area of the blade, separating it from the
peripheral areas thereof, said second part of the blade
being made of an elastically deformable material, such
as rubber, or similar.
The second part of the blade V-shaped insert,
which surrounds the central area of the blade, may have
different widths and is usually a few centimeters
large.
The V shape may be more or less pointed and
rounded, from a round arched shape, through an arched
spindle-like shape, to a V shape with straight arms, or
similar.
The second part of the blade may be extended up to
the end of the blade, thus completely separating the
central part of the blade from the first peripheral
part, or may terminate at a certain distance from the
end of the blade, so that the central area of the blade
is connected to the first peripheral part, by two
strips of material along the free edge of the blade.
The second part of the blade and the central part
thereof may be made of materials being different from
each other and from the first peripheral part of the
blade. Particularly, advantages are obtained from
combinations, wherein the second part of the blade is
different both from the first and from the central one,
whereas the central part is made of the same material
as the first part of the blade, or of a different
material therefrom.
The second part of the blade has an accordion,
i.e. corrugated cross section.
In the embodiment in which the central part,
delimited by the second V-shaped part of the blade, is
made of the same material as the first peripheral part
of the blade, the blade consists of two different
materials, which may be both different from the
materials forming the footpocket or the second V-shaped
part of the blade may be made of a material which is
substantially identical to that of the footpocket. The
fin obtained therefrom would be composed of a minimum
of two and a maximum of three different materials.
When the central part is also made of a different
material from that of the other parts of the blade and
of the footpocket, the fin obtained therefrom will be
formed by a minimum of three, and a maximum of four
different materials.
When the central part of the blade is connected to
the first peripheral part of the blade, advantages will
be obtained from providing a V-shaped second part with
such a shape that the central part is substantially T-shaped.
Thanks to the above arrangements, the flexibility
and deformability properties of the fin are
considerably improved, thereby providing an operating
behavior which is as close as possible to perfection.
By providing a second part connecting the central
part to the peripheral part of the blade, and by using
an elastic material therefor, particularly even
accordion-folded, the blade according to the invention
provides optimal hydrodynamic characteristics. The
whole involving low costs, slightly higher than those
required for fabricating traditional fins.
The fin according to the invention may be
fabricated by a multi-injection process, or by
inserting preformed members of the first peripheral
part of the blade and of the central part thereof in a
bi-injection mold, for the footpocket part and for the
second part of the blade respectively.
The invention relates to further characteristics,
which form the subject of the dependent claims.
The characteristics of the invention and the
advantages derived therefrom will appear more clearly
from the following description of a few embodiments,
illustrated in the accompanying drawings, in which:
The fin, as shown in fig. 1, may be composed of a
foot seat, the so-called footpocket 3, and of a blade
part 1, having in its central part a U-shaped insert
201, made of a soft material, which has divergent arms,
reaching the end of the blade.
The footpocket 3 is made of a soft material, such
as rubber or similar, whereas the blade part 1,
connected to the footpocket 3 is of a relatively stiff
material, particularly of plastic.
The U-shaped insert 201 is one to a few
centimeters wide, and is made of a material which is
different from that of the blade 1, and particularly of
the same material as the footpocket 3, such as rubber
or similar.
Said U-shaped insert 201 is connected through
chemical-thermal adhesion, from one side to the
peripheral part of the blade 101 and from the other
side to a stiffer central area 301.
The stiffer central area 301 may be made of the
same material as the peripheral part 101 or in any
other material having stiffness or color
characteristics differing from those of the peripheral
part 101 of the blade and of the U-shaped insert 201.
This construction allows a perfect deformation of
the blade 1: under water thrust, the central part 301,
thanks to the higher deformability of the material
forming the U-shaped insert 201 is moved and deformed,
providing the blade 1 with a spoon shape in both
directions, at least as seen in cross section and at
least in its central area.
The fin may be fabricated by multi-injection
molding, with the nozzles for the different materials
being provided in the different corresponding areas of
the mold.
Alternatively, the single central part 301 and/or
the peripheral part 101 of the blade may be made in
separate molds, whereon said parts are properly
positioned in the injection mold for the molding
material/s of the footpocket 3 and/or of the insert
201.
The U-shaped insert 201 has the additional
advantage that it allows higher tolerances in mutually
positioning the peripheral part 101 and the central
part 301 of the blade, often made of a stiffer
material.
Especially, it allows not to account for the
considerable shrinkage of the materials during molding
due to the heating temperatures required in the molding
process. The need to account for these size changes is
one of the greatest difficulties arising from the
fabrication of fins with blades consisting of two
different materials, both relatively stiff and covering
wide surfaces of the blade.
In the second illustrated embodiment, referring to
fig. 2, the fin differs from the one shown in fig. 1 in
that it has, in its central part, a pointed V-shaped
insert 201, which does not reach the end of the blade
1. The central part 301 is connected to the peripheral
part 101 by two lateral strips 501, made of the same
material as the peripheral part 101. Hence, the central
part 301 is substantially T-shaped.
Between the peripheral part 101 of the fin and the
insert 201, there is provided a hollow 2, having a
corresponding projection 2' on the rear side, as shown
in fig. 3. The hollow and the corresponding projection
also have a pointed V shape, which is substantially
similar to that of the part 201 of the blade. The
hollow 2 is connected in decreasing depth to the end of
the blade 1.
The central area 301 of the blade has a slightly
arched longitudinal projection 401 therein, having a
substantially elongated shape in the axial direction of
the blade, which has a corresponding step-like recess
401' on the rear side.
In the rear part, the two lateral ribs 4 and the
wide central projection 2' delimit two longitudinal
side grooves 5 therein, which terminate at the point of
the footpocket in a very deep notch 6.
Figure 4 is a cross sectional view of the blade 1,
at about the middle of its length, with the two lateral
ribs 4, the two downflow grooves 5, the second
accordion-folded part 201 of the blade made of soft
material, the central part of the blade 301, there
being emphasized the longitudinal fore projection 401
and the corresponding step-like rear recess 401'.
These arrangements have the advantage to improve
the dynamic deformability properties of the fin inside
water, while ensuring a better thrust, thanks to the
spoon-shaped deformation and to the greater amount of
water collected.
The invention is not limited to the embodiments
described and illustrated herein, but may be greatly
varied, especially as regards construction. So, for
example, the different shapes of the second part 201 of
the blade may be provided in combination with the
example shown in fig. 1 and with that shown in fig. 2.
The accordion cross section may be also provided in
combination with the embodiment shown in fig. 1. The
whole without departure from the guiding principle
disclosed above and claimed below.
Claims (20)
1. A swim fin comprising a blade part (1) and a
seat for the foot, the so-called footpocket (2), the
blade part (1) consisting of at least two parts, a
first and a second part of the blade (101, 201), made
of different materials, characterized in that the blade
(1) has an additional part (301), which is made of a
material being different at least from said second part
of the blade (201).
2. A fin as claimed in claim 1, characterized in
that the second part of the blade (201) is U- or V-shaped
and delimits a central area (301) of the blade,
separating it from the peripheral areas of the blade
(101), said second part of the blade (201) being made
of an elastically deformable material, such as rubber,
or similar.
3. A fin as claimed in claims 1 or 2,
characterized in that the second part of the blade
(201), a V-shaped insert, which surrounds the central
area (301) of the blade, may have different widths and
is generally a few centimeters large.
4. A fin as claimed in claims 2 or 3,
characterized in that the V or U shape of the second
part (201) of the blade may be more or less pointed and
rounded, from a round arched shape, through an arched
spindle-like shape, to a V shape with straight arms.
5. A fin as claimed in one or more of the
preceding claims, characterized in that the second part
(201) of the blade may be extended up to the end of the
blade, thus completely separating the central part
(301) of the blade from the first peripheral part
(101), or may terminate at a certain distance from the
end of the blade, so that the central area of the blade
is connected to the first peripheral part, by two
strips of material (501) along the free edge of the
blade.
6. A fin as claimed in one or more of the
preceding claims, characterized in that the second part
(201) of the blade and the central part (301) thereof
may be made of materials being different from each
other and from the first peripheral part (101) of the
blade both as regards typology and, individually or in
combination, as regards stiffness, flexibility,
extensibility, color.
7. A fin as claimed in claim 6, characterized in
that the second part (201) of the blade is different
both from the first (101) and from the central one
(301) as regards typology and/or technical
characteristics of the material and/or color, whereas
the central part (301) may be identical as regards
typology and/or technical characteristics of the
material and/or color of the material to the first part
of the blade, or of a different material therefrom, and
whereas the second part of the blade (201) may be made
of the same type of material as the footpocket, or of a
different material, the fin being composed of a minimum
of two and a maximum of four different materials, and
the blade (1) being composed of a minimum of two and a
maximum of three different materials.
8. A fin as claimed in one or more of the
preceding claims, characterized in that the second part
(201) of the blade has an accordion cross section.
9. A fin as claimed in claim 8, characterized in
that the second part of the blade (201), has a
corrugated cross section, all along its longitudinal
extension, there being provided at least one,
particularly two, preferably three or more
corrugations.
10. A fin as claimed in one or more of the
preceding claims, characterized in that the central
part (301) of the blade has a plan T-shape, the
transverse arm of the T being at the free end edge of
the blade (1), whereas the ends of the transverse arms
of the T may or may not be connected to the
corresponding peripheral part (101) of the blade.
11. A fin as claimed in one or more of the
preceding claims, characterized in that the first
peripheral part (101) of the blade has a hollow (2) in
the central area of the upper face, outwardly
surrounding the second part (201) of the blade, which
is provided on the bottom area of the hollow (2).
12. A fin as claimed in claim 11, characterized in
that the hollow (2) on the upper face of the fin
corresponds to a projection (2') on the lower face of
the blade (1), which is substantially complementary to
the hollow (2) in shape.
13. A fin as claimed in claim 12, characterized in
that the hollow (2) and the complementary projection
(2') have a relatively prominent step-like connection
rim along the rest of the peripheral part (101) of the
blade, but degrade in a rounded profile towards the
outer edge of the second part (201) of the blade,
following its outer peripheral shape in a substantially
corresponding way.
13. A fin as claimed in one or more of the
preceding claims, characterized in that the projection
(2') in the central area of the blade (1) forms two
longitudinal side downflow grooves (5) on the lower
face of the blade between the peripheral walls of said
projection (2') and the lateral ribs (4) of the blade
(1), which grooves (5) discharge together into a notch
(6) in the area connecting the footpocket (3) to the
blade (1) and at the top of the projection (2').
15. A fin as claimed in claim 14, characterized in
that the blade (1) and the footpocket (3) have slanting
lower or rear faces which form a predetermined angle,
whereas the lateral ribs get higher in the area
connecting the blade (1) to the footpocket (3), and
form the lateral boundary of the discharge notch (6)
for the longitudinal side grooves (5) on the rear face
of the blade (1).
16. A fin as claimed in one or more of the
preceding claims, characterized in that the top of the
projection (2') on the footpocket (3) side does not
project beyond the plane defined by the edges of the
lateral ribs.
17. A fin as claimed in one or more of the
preceding claims, characterized in that the footpocket
(3) forms a projection on the rear side of the fin,
with respect to the rear or lower face of the
peripheral part (101) of the blade (1), which delimits
the notch (6) on the footpocket (3) side, and which
projecting footpocket (3) has a rounded profile, with a
projection substantially comparable to that of the
projection (2') and of the lateral ribs (4).
18. A fin as claimed in one or more of the
preceding claims, characterized in that the central
part (301) has, on its upper face, at least one
longitudinal projection (401), which is slightly arched
and corresponds to a longitudinal step-like recess
(401') on the rear face.
19. A fin as claimed in claim 18, characterized in
that the longitudinal projection/s (401) are of a
substantially elongated shape, extending in the axial
direction of the blade.
20. A swim fin, wholly or partially as described,
illustrated and for the purposes stated herein.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT97SV000032A IT1294057B1 (en) | 1997-06-13 | 1997-06-13 | SWIMMING FIN. |
| ITSV970032 | 1997-06-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0884073A2 true EP0884073A2 (en) | 1998-12-16 |
| EP0884073A3 EP0884073A3 (en) | 1999-12-01 |
Family
ID=11408228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98110808A Withdrawn EP0884073A3 (en) | 1997-06-13 | 1998-06-12 | Swim fin |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0884073A3 (en) |
| IT (1) | IT1294057B1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1127589A1 (en) * | 2000-02-25 | 2001-08-29 | HTM SPORT S.p.A. | Swimming flipper |
| US7077715B2 (en) | 2002-09-12 | 2006-07-18 | Pod Ware Pty Ltd. | Swim fins and method of manufacture thereof |
| AU2003258381B2 (en) * | 2002-09-12 | 2008-04-17 | Pod Ware Pty Ltd | Improvements in swim fins and method of manufacture thereof |
| US8641464B2 (en) | 2010-04-08 | 2014-02-04 | Cetatek Holdings Inc. | Flippers, boots, systems including same, and methods of using same |
| US9440114B2 (en) | 2012-10-12 | 2016-09-13 | Cetatek Holdings Inc. | Boot sole system and fin for same |
| US10675508B2 (en) | 2010-04-08 | 2020-06-09 | Cetatek Holdings Inc. | Coupleable fin apparatuses and boot toe bodies |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB746764A (en) * | 1953-03-23 | 1956-03-21 | E T Skinner & Company Ltd | Improvements in or relating to swim-fins |
| FR2329307A1 (en) * | 1975-10-28 | 1977-05-27 | Cavalero Rene | Flipper for underwater swimming - has large rigid propelling surface extending into flexible robber base under foot for increased propulsion |
| FR2506619A1 (en) * | 1981-05-27 | 1982-12-03 | Beuchat Georges | Swim fin with zones for propulsion - has half truncated cones with wide base at front to trap water |
| US4599071A (en) * | 1984-11-19 | 1986-07-08 | Juang Ruey T | Adjustable beach-shoes |
| EP0579046A1 (en) * | 1992-07-17 | 1994-01-19 | TECHNISUB S.p.A. | Swimming flipper |
| EP0627245B1 (en) * | 1993-05-25 | 1997-01-02 | Alba Conseil | Three material swim fin with composite blade |
-
1997
- 1997-06-13 IT IT97SV000032A patent/IT1294057B1/en active IP Right Grant
-
1998
- 1998-06-12 EP EP98110808A patent/EP0884073A3/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB746764A (en) * | 1953-03-23 | 1956-03-21 | E T Skinner & Company Ltd | Improvements in or relating to swim-fins |
| FR2329307A1 (en) * | 1975-10-28 | 1977-05-27 | Cavalero Rene | Flipper for underwater swimming - has large rigid propelling surface extending into flexible robber base under foot for increased propulsion |
| FR2506619A1 (en) * | 1981-05-27 | 1982-12-03 | Beuchat Georges | Swim fin with zones for propulsion - has half truncated cones with wide base at front to trap water |
| US4599071A (en) * | 1984-11-19 | 1986-07-08 | Juang Ruey T | Adjustable beach-shoes |
| EP0579046A1 (en) * | 1992-07-17 | 1994-01-19 | TECHNISUB S.p.A. | Swimming flipper |
| EP0627245B1 (en) * | 1993-05-25 | 1997-01-02 | Alba Conseil | Three material swim fin with composite blade |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1127589A1 (en) * | 2000-02-25 | 2001-08-29 | HTM SPORT S.p.A. | Swimming flipper |
| US6290561B1 (en) | 2000-02-25 | 2001-09-18 | Htm Sport S.P.A. | Swimming flipper |
| US7077715B2 (en) | 2002-09-12 | 2006-07-18 | Pod Ware Pty Ltd. | Swim fins and method of manufacture thereof |
| AU2003258381B2 (en) * | 2002-09-12 | 2008-04-17 | Pod Ware Pty Ltd | Improvements in swim fins and method of manufacture thereof |
| US8641464B2 (en) | 2010-04-08 | 2014-02-04 | Cetatek Holdings Inc. | Flippers, boots, systems including same, and methods of using same |
| US9737762B2 (en) | 2010-04-08 | 2017-08-22 | Cetatek Holdings Inc. | Flippers, boots, systems including same, and methods of using same |
| US10112079B2 (en) | 2010-04-08 | 2018-10-30 | Cetatek Holdings Inc. | Flippers, boots, systems including same, and methods of using same |
| US10675508B2 (en) | 2010-04-08 | 2020-06-09 | Cetatek Holdings Inc. | Coupleable fin apparatuses and boot toe bodies |
| US9440114B2 (en) | 2012-10-12 | 2016-09-13 | Cetatek Holdings Inc. | Boot sole system and fin for same |
Also Published As
| Publication number | Publication date |
|---|---|
| ITSV970032A1 (en) | 1998-12-13 |
| IT1294057B1 (en) | 1999-03-15 |
| EP0884073A3 (en) | 1999-12-01 |
| ITSV970032A0 (en) | 1997-06-13 |
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