EP0652794B1 - Inflatable ball for ball games, in particular football - Google Patents
Inflatable ball for ball games, in particular football Download PDFInfo
- Publication number
- EP0652794B1 EP0652794B1 EP93916298A EP93916298A EP0652794B1 EP 0652794 B1 EP0652794 B1 EP 0652794B1 EP 93916298 A EP93916298 A EP 93916298A EP 93916298 A EP93916298 A EP 93916298A EP 0652794 B1 EP0652794 B1 EP 0652794B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ball
- hexagons
- length
- sides
- pentagon
- 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
Links
- 239000000463 material Substances 0.000 abstract description 12
- 241001212149 Cathetus Species 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000011253 protective coating 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
- A63B41/00—Hollow inflatable balls
- A63B41/08—Ball covers; Closures therefor
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2243/00—Specific ball sports not provided for in A63B2102/00 - A63B2102/38
- A63B2243/0025—Football
Definitions
- the invention relates to an inflatable ball for ball games, in particular football, comprising an outer ball having interconnected parts consisting of twelve equilateral pentagons and twenty equiangular hexagons, each pentagon being enclosed by five hexagons and, at the location of the connection between a pentagon and a hexagon, the sides connected to one another being of equal length.
- the object of the invention is to avoid the abovementioned disadvantages and to provide an inflatable ball as indicated in the preamble, whose hexagons and pentagons - in the inflated state of the ball - are subjected to essentially equal material stresses and degrees of stretch and whose spherical shape is improved.
- the ball is characterised in that each of the hexagons has three sides of relatively great length connected to a pentagon and three sides of relatively small length connected to a hexagon, and the length of the short sides is at least 0.69 times the length of the long sides.
- the length of the short sides of each hexagon will have to be 0.839 times the length of the long sides.
- this ratio is to be preferred, because the material stresses and the degree of stretch of the hexagons and pentagons in the inflated state of the ball are virtually equal.
- the ball according to the invention does not necessarily have to comprise an inner ball, and if the ball according to the invention does have an inner ball, said inner ball will usually be glued to the outer ball consisting of pentagons and hexagons.
- Figure 1 shows a perspective view - not to scale - of a part of the ball according to the invention.
- Figures 2 and 3 show a view of a hexagonal part and a pentagonal part, respectively, used in the ball according to the invention.
- the ball according to the invention is composed of twelve equilateral pentagonal parts 1 and twenty hexagonal parts 2, each pentagon being connected to five hexagons and each hexagon being connected to three other hexagons and three pentagons.
- the hexagons are equiangular, but not equilateral, the ratio between the length of the relatively short cathetuses b and the length of the relatively long cathetuses a being at least 0.69 and preferably 0.839.
- the length of the long cathetuses a corresponds to the length of a side of a pentagon. It has been established that by choosing 0.69 a ⁇ b ⁇ a, the difference in material stress and material stretch in the pentagons and hexagons of an inflated ball is smaller than when b is smaller than 0.69 a or greater than a.
- the material stress and the degree of stretch in the hexagons, in the inflated state of the ball are virtually equal to the material stress and the degree of stretch in the pentagons.
- the value of b is in the said range between a and 0.69 a, the difference in material stress and degree of stretch will be less than when a and b are equal, i.e. when the hexagons are equilateral.
Abstract
Description
- The invention relates to an inflatable ball for ball games, in particular football, comprising an outer ball having interconnected parts consisting of twelve equilateral pentagons and twenty equiangular hexagons, each pentagon being enclosed by five hexagons and, at the location of the connection between a pentagon and a hexagon, the sides connected to one another being of equal length.
- In a design of this ball which is generally known (see for example DE-A-2 541 889), the hexagons are equilateral. It has been found that, in the inflated state, the stress in the material of the hexagons is markedly greater than the stress in the material of the pentagons. If the ball is kicked, the path through which the ball travels, the speed of the ball and the so-called spin will depend on the spot where the ball is struck. The behaviour of the ball when it bounces is also dependent on whether the ball strikes the ground with a hexagon or a pentagon. It will be obvious that such uncertainty is undesirable, in particular with top sportsmen. The difference in stress and the degree of stretch in the material of the hexagons and pentagons can be explained by imagining what happens if a perfectly spherical inner ball is inflated inside the outer ball consisting of pentagons and hexagons. It appears that the hexagons come into contact with the inner ball sooner than the pentagons, while when the pentagons are touching the inner ball in only one spot, the hexagons are already touching the inner ball with a relatively large surface.
- Another disadvantage of the difference in stress and the degree of stretch in the material of the hexagons and pentagons is that the seams between the hexagons themselves are subject to greater forces and consequently split and wear more quickly than the seams between the hexagons and the pentagons. In addition, the hexagons on average wear more quickly than the pentagons, and the same goes for the protective coating layer. Apart from the behaviour of the ball regarding flight, bounce and wear, the spherical shape is also improved. The conventional football is not completely spherical and during the production process a certain number of balls are rejected as they do not meet set tolerance requirements in respect of roundness, weight and position of the centre of gravity.
- The object of the invention is to avoid the abovementioned disadvantages and to provide an inflatable ball as indicated in the preamble, whose hexagons and pentagons - in the inflated state of the ball - are subjected to essentially equal material stresses and degrees of stretch and whose spherical shape is improved.
- To this end, according to the invention, the ball is characterised in that each of the hexagons has three sides of relatively great length connected to a pentagon and three sides of relatively small length connected to a hexagon, and the length of the short sides is at least 0.69 times the length of the long sides.
- In order to ensure that the distance from the imaginary centre of an inflated inner ball to the centre point of the hexagons is equal to the distance of the centre of the inner ball to the centre point of the pentagons, the length of the short sides of each hexagon will have to be 0.839 times the length of the long sides.
- Obviously, this ratio is to be preferred, because the material stresses and the degree of stretch of the hexagons and pentagons in the inflated state of the ball are virtually equal.
- Incidentally, in order to achieve the effect according to the invention, the ball according to the invention does not necessarily have to comprise an inner ball, and if the ball according to the invention does have an inner ball, said inner ball will usually be glued to the outer ball consisting of pentagons and hexagons.
- The invention will be explained in more detail below by reference to the figures.
- Figure 1 shows a perspective view - not to scale - of a part of the ball according to the invention.
- Figures 2 and 3 show a view of a hexagonal part and a pentagonal part, respectively, used in the ball according to the invention.
- The ball according to the invention is composed of twelve equilateral pentagonal parts 1 and twenty
hexagonal parts 2, each pentagon being connected to five hexagons and each hexagon being connected to three other hexagons and three pentagons. - According to the invention, the hexagons are equiangular, but not equilateral, the ratio between the length of the relatively short cathetuses b and the length of the relatively long cathetuses a being at least 0.69 and preferably 0.839. The length of the long cathetuses a corresponds to the length of a side of a pentagon. It has been established that by choosing 0.69 a<b<a, the difference in material stress and material stretch in the pentagons and hexagons of an inflated ball is smaller than when b is smaller than 0.69 a or greater than a. When the preferred value
- The most important advantages of the invention are:
- the fact of whether a pentagon or a hexagon of the ball comes into contact with a shoe, a head or the ground does not have an effect on the movement of the ball, or has a smaller effect, and the player can be much more certain of the spot where a ball which has been kicked or headed, or a bouncing ball, will land,
- and the connections between the hexagons themselves and the connections between the hexagons and the pentagons are subjected to essentially the same stress and thus essentially the same wear phenomena,
- the hexagons do not wear more quickly than the pentagons,
- the production process will have a smaller number of rejections or will allow higher tolerances.
Claims (2)
- Inflatable ball for ball games, in particular football, comprising an outer ball having a number of interconnected parts consisting of twelve equilateral pentagons and twenty equiangular hexagons, each pentagon being enclosed by five hexagons and at the location of the connection between a pentagon and a hexagon the sides connected to one another being of equal length, characterised in that each of the hexagons has three sides (a) of relatively great length connected to a pentagon and three sides (b) of relatively small length connected to a hexagon, and the length of the short sides (b) is at least 0.69 times the length of the long sides (a).
- Ball according to Claim 1, characterised in that the length of the short sides (b) of each hexagon is 0.839 times the length of the long sides (a).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL9201381 | 1992-07-30 | ||
NL9201381A NL9201381A (en) | 1992-07-30 | 1992-07-30 | Inflatable ball for ball games, especially football. |
PCT/NL1993/000147 WO1994003239A1 (en) | 1992-07-30 | 1993-07-09 | Inflatable ball for ball games, in particular football |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0652794A1 EP0652794A1 (en) | 1995-05-17 |
EP0652794B1 true EP0652794B1 (en) | 1996-02-21 |
Family
ID=19861134
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93916298A Expired - Lifetime EP0652794B1 (en) | 1992-07-30 | 1993-07-09 | Inflatable ball for ball games, in particular football |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0652794B1 (en) |
AT (1) | ATE134314T1 (en) |
AU (1) | AU4589993A (en) |
DE (1) | DE69301607T2 (en) |
DK (1) | DK0652794T3 (en) |
ES (1) | ES2085164T3 (en) |
GR (1) | GR3019843T3 (en) |
NL (1) | NL9201381A (en) |
WO (1) | WO1994003239A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005031255A1 (en) * | 2005-07-05 | 2007-01-11 | Niemeier, Bärbel | Ball for exercising underchallenged sheepdogs or cattle dogs is made up of twelve pentagons of wear-resistant, double-layered canvas sewn together and stuffed with wadding, six bands of bite-resistant material being sewn along its edges |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19541395C2 (en) * | 1995-11-07 | 1998-01-22 | Uhlsport Gmbh | Ball cover, in particular for soccer balls |
NL1006300C2 (en) * | 1997-06-12 | 1998-12-15 | Pieter Huybers | Outer ball with inflatable inner ball for sports purposes |
ES2152888B1 (en) * | 1999-03-24 | 2001-12-01 | Univ Oviedo | DESIGN OF A COMPACT BALL. |
EP1350542A1 (en) * | 2000-10-10 | 2003-10-08 | Francisco Pacheco | Cover for a ball or sphere |
US6988969B2 (en) * | 2002-04-24 | 2006-01-24 | Nike, Inc. | Game ball with bridged panels |
NL1021303C1 (en) | 2002-08-20 | 2004-02-24 | Pieter Huybers | A new type of football with improved features. |
PT105457B (en) | 2010-12-27 | 2018-04-16 | Inst Superior Tecnico | INFLATABLE BALL FOR SOCCER AND RECREATIONAL ACTIVITIES |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2541889A1 (en) * | 1975-09-19 | 1977-03-24 | Stamm Kg Jos | Leather football manufacturing method - has each leather piece provided with layers of material to help retain its shape |
US4830373A (en) * | 1987-12-16 | 1989-05-16 | Rudolf Dehnert | Soccer ball |
FR2642978B1 (en) * | 1989-02-16 | 1991-05-10 | Badia Salvat Jaime | PROCESS FOR THE MANUFACTURE OF BALLOONS AND BALLOONS OBTAINED BY THIS PROCESS |
-
1992
- 1992-07-30 NL NL9201381A patent/NL9201381A/en not_active Application Discontinuation
-
1993
- 1993-07-09 DE DE69301607T patent/DE69301607T2/en not_active Expired - Lifetime
- 1993-07-09 EP EP93916298A patent/EP0652794B1/en not_active Expired - Lifetime
- 1993-07-09 AT AT93916298T patent/ATE134314T1/en active
- 1993-07-09 DK DK93916298.8T patent/DK0652794T3/en active
- 1993-07-09 ES ES93916298T patent/ES2085164T3/en not_active Expired - Lifetime
- 1993-07-09 AU AU45899/93A patent/AU4589993A/en not_active Abandoned
- 1993-07-09 WO PCT/NL1993/000147 patent/WO1994003239A1/en active IP Right Grant
-
1996
- 1996-05-07 GR GR960401218T patent/GR3019843T3/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005031255A1 (en) * | 2005-07-05 | 2007-01-11 | Niemeier, Bärbel | Ball for exercising underchallenged sheepdogs or cattle dogs is made up of twelve pentagons of wear-resistant, double-layered canvas sewn together and stuffed with wadding, six bands of bite-resistant material being sewn along its edges |
Also Published As
Publication number | Publication date |
---|---|
ATE134314T1 (en) | 1996-03-15 |
DE69301607D1 (en) | 1996-03-28 |
ES2085164T3 (en) | 1996-05-16 |
DE69301607T2 (en) | 1996-08-29 |
WO1994003239A1 (en) | 1994-02-17 |
DK0652794T3 (en) | 1996-03-18 |
EP0652794A1 (en) | 1995-05-17 |
AU4589993A (en) | 1994-03-03 |
GR3019843T3 (en) | 1996-08-31 |
NL9201381A (en) | 1994-02-16 |
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