EP0904135A1 - Boule pour jeu de boules, notamment pour la petanque - Google Patents
Boule pour jeu de boules, notamment pour la petanqueInfo
- Publication number
- EP0904135A1 EP0904135A1 EP97924077A EP97924077A EP0904135A1 EP 0904135 A1 EP0904135 A1 EP 0904135A1 EP 97924077 A EP97924077 A EP 97924077A EP 97924077 A EP97924077 A EP 97924077A EP 0904135 A1 EP0904135 A1 EP 0904135A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ball
- ribs
- ball according
- shell
- rib
- 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
Links
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0098—Rigid hollow balls, e.g. for pétanque
Definitions
- the invention relates to the field of game balls, in particular courttanque or Lyonnaise game balls. It relates more particularly to the balls produced by the assembly of two hemispherical shells. It relates more precisely to the geometry of the internal surface of these shells which makes it possible on the one hand to improve the behavior of the ball during play, and on the other hand to facilitate its manufacture.
- Document FR-A-2 638 375 proposes as a solution to produce inside the ball a network of circular striations intended to influence the propagation of the shock wave inside the ball.
- the results obtained with such streaks are insufficient from a point of view of the behavior of the ball.
- the production of these ridges requires complex machining operations to be carried out and which notoriously increase the cost price of such a ball.
- this embodiment has two major drawbacks.
- connection of all the ribs between them facilitates the propagation of the shock wave on the internal surface of the ball and ensures no attenuation thereof. It follows that the rebound phenomena are only very partially reduced.
- complex tools namely in particular a punch on which the complementary network of the ribs sought on the final ball must be produced in hollow. The machining and more precisely the milling of these hollow areas turns out to be complex and therefore costly.
- the problem which the invention therefore proposes to solve is to allow the production of a ball whose structure ensures good attenuation of the propagation of the shock wave, which is easy to produce and does not require complex tools.
- the invention therefore relates to a ball for a game of balls, in particular for courttanque, produced by assembling, at its equatorial plane, two hemispherical shells manufactured in particular by stamping-stamping, forming, foundry or machining, each shell comprising on its internal face of the protruding patterns.
- This ball is characterized in that the patterns consist of independent ribs arranged only on all or part of the meridians.
- the invention consists in individualizing the patterns arranged on the inner face of the ball and in arranging them in such a way that the tool making it possible to obtain them is easy to produce.
- the invention consists in distributing on the inner face of the ball, independent protuberance zones, inside which the attenuation of the shock wave takes place, these corresponding protruding portions, at the tooling level, in hollow areas which can easily be produced by "rolling" milling.
- the different ribs can for example be continuous and then occupy the entire length of the meridians on which they are arranged, excluding the pole area, and this to avoid any mechanical connection. They can also be discontinuous and consist of a plurality of segments occupying a fraction of the length of the meridians on which they are arranged.
- the ribs are of different length and distributed in an alternating and regular manner on the internal surface of each shell.
- the number of ribs is even to avoid the appearance of imbalances.
- the excess thickness of each rib is gradually decreasing at the end of each rib.
- each half-shell has means provided for this purpose on its outer face.
- each rib typically is between 1.5 and 3 millimeters and the maximum excess thickness of each rib is between 1 and 3 mm. Indeed, below a millimeter, it can be seen that the attenuation of the shock wave is not sufficient.
- FIG. 1 is a summary perspective view of the interior face of a ball according to the invention.
- Figure 2 is a meridian sectional view of such a ball.
- FIG. 3 is a summary perspective view of an alternative embodiment shown in meridian section in FIG. 4.
- FIG. 5 is a summary perspective view of the tool making it possible to obtain the patterns of FIG. 3.
- the invention consists in making a ball, in particular for the game of courttanque which has on its inner surface patterns allowing to attenuate the propagation of shock waves, and which is as easy as possible to produce.
- This type of ball is obtained by the association of two hemispherical shells obtained by stamping-stamping, by foundry or by machining. With regard to forging, one can proceed by cold deformation, hot or semi-hot.
- the inner face of such a hemispherical shell (1) has a plurality of ribs (2, 3) distributed over the entire surface. According to an essential characteristic of the invention, these ribs (2, 3) are arranged along the meridians (M) of the shell (1).
- each of the ribs makes it possible to obtain attenuation characteristics of the specific shock wave.
- the ribs (2,3) are in even number, which allows to maintain symmetry with respect to the axis (OP) connecting the center of the ball to the 'one of the poles, and therefore to limit imbalances.
- each rib (2, 3) extends over a part of the meridian (M) which it occupies without discontinuity.
- the ribs (2, 3) break down into two groups, interspersed alternately.
- a first half of the ribs (3) have a length substantially equal to 80% of a half-meridian (M3) while the other half (2) occupies substantially 60% of the interposed meridians (M2).
- M3 half-meridian
- M2 interposed meridians
- the maximum excess thickness of a rib (2, 3) is between 1 and 3 millimeters, preferably in the vicinity of 2.5 mm, while the width of the same rib (2, 3) is also between 1 , 5 and 3 millimeters.
- the invention is in no way limited to the illustrated embodiment, but on the contrary embraces all variants of the number of shapes and dimensions compatible with an essential principle of the meridian distribution and the absence of connection of such ribs.
- connection zone between the rib and the interior spherical surface forms an angle as pronounced as possible, close to 90 °.
- each of the ribs (22, 23) occupy only a portion of the meridian (M22, M23) on which they are located.
- these ribs (22, 23) are broken down into two groups arranged between different parallels (24, 25) drawn in dotted lines.
- a first group of about twenty short ribs (23) are produced at the level of the proximity of the equatorial plane (E) while the second group comprises a dozen ribs (22) of greater length converging towards the pole ( P).
- the ribs of the two groups are present on four common meridians, which facilitates the operation of machining the punch.
- the profile and the variation in thickness of the ribs (22, 23) must be compatible with good clearance of the punch (10), as can be observed for the end (26) the rib (23) of FIG. 4.
- each half-shell (20) may include an indexing lug (30) making it possible to compare the internal ribs (22, 23), during the assembly of the two hemispherical shells ( 20).
- the geometry according to the invention not only improves the performance of the ball, but also facilitates its manufacture.
- the punch (10) which makes it possible to create the ribs (22, 23) of FIG. 3, characteristics of the invention is obtained by relatively simple machining. More specifically, the grooves (12, 13) of the punch (10) corresponding to the ribs (22, 23) of the inner face of the ball are produced by milling "while rolling" from a milling cutter pivoting about an axis perpendicular to its displacement. This cutter moves along the meridians (M12, Ml 3) and digs the grooves (12, 13) according to a profile allowing easy release of the half-shell.
- the extra thickness of the rib (2, 3) of the shell (1) or, in addition, the depth of the groove (12, 13) is variable at the ends (4, 5, 6, 7; 14, 15, 16, 17) thereof.
- the manufacture of the tooling in accordance with the invention requires approximately two times less time than for the tooling necessary for the production of balls of the prior art.
- the geometry obtained allows an improvement in the flow of metal during restamping-stamping which results in a doubling of the number of balls made from the same tool.
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Pinball Game Machines (AREA)
- Stringed Musical Instruments (AREA)
- Golf Clubs (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Forging (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9606315A FR2748669B1 (fr) | 1996-05-15 | 1996-05-15 | Boule pour jeu de boules, notamment pour la petanque |
FR9606315 | 1996-05-15 | ||
PCT/FR1997/000839 WO1997043017A1 (fr) | 1996-05-15 | 1997-05-13 | Boule pour jeu de boules, notamment pour la petanque |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0904135A1 true EP0904135A1 (fr) | 1999-03-31 |
EP0904135B1 EP0904135B1 (fr) | 2002-06-05 |
Family
ID=9492330
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97924077A Expired - Lifetime EP0904135B1 (fr) | 1996-05-15 | 1997-05-13 | Boule pour jeu de boules, notamment pour la petanque |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0904135B1 (fr) |
DE (1) | DE69713095T2 (fr) |
ES (1) | ES2176741T3 (fr) |
FR (1) | FR2748669B1 (fr) |
PT (1) | PT904135E (fr) |
WO (1) | WO1997043017A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2832935B1 (fr) * | 2001-11-30 | 2007-02-09 | Vartan Berberian | Boule pour jeux de boules comportant des motifs sur sa face externe |
FR2900349B1 (fr) * | 2006-04-27 | 2009-07-31 | Edouard Dussauze | Boule a jouer et son procede de fabrication |
DE102006029490C5 (de) * | 2006-06-27 | 2015-07-02 | Khs Gmbh | Verfahren zur Steuerung einer Füllanlage |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1964008A (en) * | 1930-12-26 | 1934-06-26 | Hamilton Trust Company | Rubber ball |
FR2638375B1 (fr) * | 1988-10-14 | 1993-03-05 | Drouillat Jean Luc | Boule a jouer, notamment pour la petanque |
FR2692159B1 (fr) * | 1992-06-10 | 1996-10-11 | Vartan Berberian | Boule pour jeux de boules et procedes d'obtention d'une telle boule. |
-
1996
- 1996-05-15 FR FR9606315A patent/FR2748669B1/fr not_active Expired - Fee Related
-
1997
- 1997-05-13 DE DE69713095T patent/DE69713095T2/de not_active Expired - Fee Related
- 1997-05-13 EP EP97924077A patent/EP0904135B1/fr not_active Expired - Lifetime
- 1997-05-13 ES ES97924077T patent/ES2176741T3/es not_active Expired - Lifetime
- 1997-05-13 WO PCT/FR1997/000839 patent/WO1997043017A1/fr active IP Right Grant
- 1997-05-13 PT PT97924077T patent/PT904135E/pt unknown
Non-Patent Citations (1)
Title |
---|
See references of WO9743017A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2748669A1 (fr) | 1997-11-21 |
FR2748669B1 (fr) | 1998-07-03 |
WO1997043017A1 (fr) | 1997-11-20 |
PT904135E (pt) | 2002-09-30 |
DE69713095D1 (de) | 2002-07-11 |
DE69713095T2 (de) | 2003-01-09 |
EP0904135B1 (fr) | 2002-06-05 |
ES2176741T3 (es) | 2002-12-01 |
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