EP0652794A1 - Inflatable ball for ball games, in particular football. - Google Patents

Inflatable ball for ball games, in particular football.

Info

Publication number
EP0652794A1
EP0652794A1 EP93916298A EP93916298A EP0652794A1 EP 0652794 A1 EP0652794 A1 EP 0652794A1 EP 93916298 A EP93916298 A EP 93916298A EP 93916298 A EP93916298 A EP 93916298A EP 0652794 A1 EP0652794 A1 EP 0652794A1
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.)
Granted
Application number
EP93916298A
Other languages
German (de)
French (fr)
Other versions
EP0652794B1 (en
Inventor
Hubertus Cornelis Jose Schaper
Franciscus Ferdinandus Schaper
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.)
SCHAPER, FRANCISCUS FERDINANDUS JOZEF
SCHAPER, HUBERTUS CORNELIS JOSEPH
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0652794A1 publication Critical patent/EP0652794A1/en
Application granted granted Critical
Publication of EP0652794B1 publication Critical patent/EP0652794B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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 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 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.
  • 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 O.69 a or greater than a.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Toys (AREA)
  • Closures For Containers (AREA)
  • Pens And Brushes (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Medicinal Preparation (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Peptides Or Proteins (AREA)

Abstract

An inflatable ball for ball games comprises an outer ball having interconnected parts consisting of twelve equilateral pentagons (1) and twenty equiangular hexagons (2). Each pentagon (1) is enclosed by five hexagons (2) and at the location of the connection between a pentagon (1) and a hexagon (2) the sides connected to one another are of equal length. In order to minimise, and preferably reduce to zero, the difference in stress in the material of the hexagons (2) and pentagons (1) when the ball is in the inflated state, each of the hexagons (2) has three sides (a) of relatively great length connected to a pentagon (1), and three sides (b) of relatively small length connected to a hexagon (2), the length of the short sides (b) being at least 0.69 times the length of the long sides (a), preferably, b = 0.839 a.

Description

Title: Inflatable ball for ball games, in particular football
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, 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 O.69 a or greater than a. When the preferred value b = 0.839 a is used, 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. As long as 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. 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

Claims
1. 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).
2. 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).
EP93916298A 1992-07-30 1993-07-09 Inflatable ball for ball games, in particular football Expired - Lifetime EP0652794B1 (en)

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 true EP0652794A1 (en) 1995-05-17
EP0652794B1 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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004018053A1 (en) 2002-08-20 2004-03-04 Pieter Huybers Ball with improved properties
WO2012091592A1 (en) 2010-12-27 2012-07-05 Instituto Superior Técnico Inflatable ball for footballing and recreational activities

Families Citing this family (6)

* Cited by examiner, † Cited by third party
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.
AU2000276405A1 (en) * 2000-10-10 2002-04-22 Francisco Pacheco Cover for a ball or sphere
US6988969B2 (en) 2002-04-24 2006-01-24 Nike, Inc. Game ball with bridged panels
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

Family Cites Families (3)

* Cited by examiner, † Cited by third party
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9403239A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004018053A1 (en) 2002-08-20 2004-03-04 Pieter Huybers Ball with improved properties
WO2012091592A1 (en) 2010-12-27 2012-07-05 Instituto Superior Técnico Inflatable ball for footballing and recreational activities

Also Published As

Publication number Publication date
EP0652794B1 (en) 1996-02-21
DE69301607T2 (en) 1996-08-29
NL9201381A (en) 1994-02-16
WO1994003239A1 (en) 1994-02-17
ES2085164T3 (en) 1996-05-16
AU4589993A (en) 1994-03-03
ATE134314T1 (en) 1996-03-15
DK0652794T3 (en) 1996-03-18
GR3019843T3 (en) 1996-08-31
DE69301607D1 (en) 1996-03-28

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