WO2006063391A1 - Method and apparatus for assisting the user of a sports ball to use spin - Google Patents
Method and apparatus for assisting the user of a sports ball to use spin Download PDFInfo
- Publication number
- WO2006063391A1 WO2006063391A1 PCT/AU2005/001879 AU2005001879W WO2006063391A1 WO 2006063391 A1 WO2006063391 A1 WO 2006063391A1 AU 2005001879 W AU2005001879 W AU 2005001879W WO 2006063391 A1 WO2006063391 A1 WO 2006063391A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ball
- sports
- sports training
- training ball
- spin
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000012384 transportation and delivery Methods 0.000 claims description 9
- 239000010985 leather Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 238000005304 joining Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 210000003811 finger Anatomy 0.000 description 17
- 230000000694 effects Effects 0.000 description 14
- 238000009987 spinning Methods 0.000 description 8
- 210000000707 wrist Anatomy 0.000 description 8
- 230000033001 locomotion Effects 0.000 description 7
- 238000009826 distribution Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 2
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 2
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 2
- 230000003466 anti-cipated effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003278 mimic effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 210000003813 thumb Anatomy 0.000 description 2
- 206010003402 Arthropod sting Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
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- 239000003086 colorant Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000007799 cork Substances 0.000 description 1
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- 230000007717 exclusion Effects 0.000 description 1
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- 230000000007 visual effect Effects 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
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
- A63B37/02—Special cores
- A63B37/10—Special cores with eccentric centre of gravity
-
- 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
- A63B37/0003—Golf balls
-
- 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
- A63B37/14—Special surfaces
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B43/00—Balls with special arrangements
- A63B43/002—Balls with special arrangements with special configuration, e.g. non-spherical
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B69/00—Training appliances or apparatus for special sports
- A63B69/0015—Training appliances or apparatus for special sports for cricket
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B69/00—Training appliances or apparatus for special sports
- A63B69/36—Training appliances or apparatus for special sports for golf
- A63B69/3623—Training appliances or apparatus for special sports for golf for driving
- A63B69/3655—Balls, ball substitutes, or attachments on balls therefor
Definitions
- This invention relates to an apparatus to assist the user of a sports ball to apply spin or to detect the unintended application of spin to a sports ball.
- the invention relates to a ball like structure having a shape that in use provides a useful tool for instruction and feedback to a user of the sports ball.
- the toy ball of Kahle discloses a hollow ball containing a diametrically extending tube. Two weights are slidably mounted within the tube. Springs urge the weights toward the centre of the ball, while cords attached to the weights keep them apart when the user holds the ball and controls the cords. When the ball is thrown and the cords are released, the springs force the weights toward the centre of the ball, thus concentrating the mass distribution of the ball near its centre.
- the spin velocity of the ball increases in order to conserve angular momentum, and the curve of the ball is enhanced.
- the Kahle device merely enhances the natural rotational force imparted to the ball by the thrower and does not assist in identification of how it spins to the thrower.
- a game or practice ball is disclosed in U.S. Pat. No. 5,072,938 issued to Shin, having a rotation produced by an internal weight distribution mechanism to cause the ball to curve dramatically when thrown.
- the ball has a substantially spherical shell.
- An axle is located diametrically within, and is connected to the shell.
- An inertial reference mass in the form of a sphere is located within the shell and is rotatably mounted on the axle.
- a user released drive means is coupled to the inner sphere and outer shell for rotating the outer shell relative to the inner sphere and portions of the drive so as to impart spin to the shell when the ball is thrown.
- the invention described herein is in contrast to the described prior attempts to assist users of a sports ball to improve the control they have over the spin they impart to the sports ball or to mechanically assist the user.
- the aim of this invention is to provide a sports ball of a shape and configuration that allows for the user and an instructor to readily determine visually whether the user of the sports ball is able to control the sports ball when imparting spin. The user of the sports training ball is then able to use the acquired skills on a normal sports ball during play.
- a sports training ball for a predetermined sport that uses a sports ball shape that is substantially spherical characterised in that the outer shape of the training sports ball is disc shaped having substantially parallel side surfaces and a spherical circumferential surface.
- a method of forming a training sports ball for a predetermined sport that uses a sports ball shape that is substantially spherical consists of the following steps: removing two opposed portions of a substantially spherical sports ball used in the predetermined sport to form the outer shape into a disc having substantially parallel side surfaces and a spherical circumferential surface.
- a further method of forming a training sports ball for a predetermined sport that uses a sports ball shape that is substantially spherical consists of the following steps: joining two parts to form a disc having two substantially parallel outer side surfaces with a spherical circumferential surface.
- said disc is formed of two substantially symmetrical parts joined together along a common plane.
- the disc is formed of two joined nonsymmetrical parts.
- the training sports ball for a predetermined sport that uses a sports ball shape that is substantially spherical includes a seam shape on the substantially spherical outermost surface.
- a further aspect of the invention is a method of training a sports player using a sports training ball according to one or more of the abovementioned aspects of the invention including the steps of: providing instructions to a user of the sports training ball to deliver the ball in accord with the rules of a predetermined sport; and providing instructions to the user to spin the sports ball in a predetermined manner during the action of the delivery of the sports training ball.
- Figure 1 depicts a traditional cricket ball
- Figure 2 depicts an over spin imparted on a ball
- Figure 3 depicts a side spin imparted on a ball
- Figure 4 depicts how drift is imparted on a ball
- Figure 5 depicts how off spin is imparted on a ball
- Figure 6 depicts how leg spin is imparted on a ball
- Figure 7 depicts a swing batting technique on a ball
- Figure 8 depicts an embodiment of a practice sports ball
- Figure 9 depicts the embodiment of Figure 8 being used to practice swing bowling
- Figure 10 depicts the embodiment of Figure 8 being used to practice spin bowling
- Figure 11 depicts the grip used to put into effect a leg spin bowling action
- Figure 12 depicts the grip used to put into effect a leg spin bowling action from a different perspective to Figure 11;
- Figure 13 depicts the anticipated movement of the ball, resulting from a leg spin bowling action
- Figure 14 depicts the grip on the ball to put into effect a leg spin bowling rotation on the ball; and Figure 15 depicts the off side and on side of a batsman.
- the sports training ball of the invention When a disc-like shape is imparted with a spinning force about its circumference, the sports training ball of the invention will travel through the air and react to being put into contact with a substantially flat sports playing surface in a manner characteristic of a similarly sized diameter spherical ball of the particular sport being trained for, but there will be differences that are not as great as to negate the action and reaction applied to the sports training ball by a person wishing to achieve the same action and reaction to a normal sports ball. Furthermore, the action and reaction of the sports training ball will be more readily apparent to the person being trained or using the sports training ball than if they had used a normal sports ball.
- the primary purpose of the sports training ball is to provide visible feedback while training for a sport where it can be important to implement spin on the ball for the purpose of either movement in the air and/ or off the ground (as for example in the game of cricket).
- batsman is used and is a term that applies to any person using a bat in the game of cricket.
- a cricket ball is a hard, solid ball typically having an interior of cork and may also be latex rubber or wool twine or combinations thereof and a leather casing having a slightly raised sewn seam to join the two halves of the leather case about a circumference of the ball.
- the ball For the game of cricket according to regulation set by the governing body, the ball must weigh between 5.5 and 5.75 ounces (155.9 and 163 grams) and measure between 8.8125 and 9 inches (224 and 229 millimetres) in circumference.
- Figure 1 depicts a standard cricket ball. Smaller weights and dimensions will apply to ladies and junior versions of a cricket ball.
- Seam The seam 10 of the ball is where it appears that two half spheres are joined together via stitching, refer to Figure 1.
- the seam is created by stitching to join two concave hemispherical halves of the outer leather casing of the ball. Typically 60-80 stiches in each row are prominent along an equatorial join of the two half spheres.
- Over spin can be considered 'topspin' as that it refers to the spin that is imparted up the back and over the top of the ball (as depicted in Figure 2). The ball then loops in the air and drops faster than would be the case of a ball with no imparted spin and then bounces high after contact with the playing surface.
- Side spin refers to the spin that is imparted on the side of the ball (either clockwise or anti-clockwise as depicted in Figure 3). When the ball hits the ground, it makes the ball turn (refer following) off the wicket.
- Turn refers to the deviation of the ball off the wicket when a bowler imparts spin on the ball.
- Drift refers to the sideways movement of the ball in the air based on the amount and direction of spin imparted on the ball. Drift is a term used for spin bowling only. Drift, when achieved correctly, preferably occurs very late in its path of travel when the ball is close to the batsman.
- Swing refers to the sideways movement of the ball in the air based on the angle of the seam and differences in air pressure produced by opposing sides of the ball. Swing is a term used for non-spin bowlers only.
- On and off side These terms are often used to describe the side of a batsman on which a particular action or result of an action takes place.
- Figure 15 illustrates the off and on side (also referred to as the leg side) as defined with respect to the batsman.
- the main aim of spin bowling is to deceive the batsman, both in the air (by making the ball drift and drop quicker than would normally be the case) and off the wicket (by making the ball turn and bounce higher than would normally be expected). This is largely achieved by making the ball: spin very quickly (i.e. high level of revolutions per minute) • have the axis of rotation horizontal
- a good rule-of -thumb is to have an angle of spin, relative to its direction of travel of 45°.
- the speed the ball travels is not critical, and is significantly lower than for fast bowling.
- a typical spin delivery has a speed in the range 70-90 km/h (45-55 m/h).
- Off spin is a type of spin bowling in the sport of cricket which is bowled by an off spinner and refers to a right-handed spin bowler who uses their fingers to spin the ball from a right-handed batsman's off side towards the on/ leg side (that is in towards the right-handed batsman or away from a left-handed batsman). This contrasts with leg spin, in which the ball spins from on/ leg to off and which is bowled with a very different action.
- leg spin is a type of spin bowling used in cricket.
- a leg spin bowler attempts to flick the ball with their wrist in the act of delivery so as to cause the ball to spin anti-clockwise.
- the spin causes the ball to deviate sharply from right to left (as seen by the bowler).
- the description applies exclusively to right-handed bowlers spinning the ball in this manner - other forms of spin bowling are known as off spin, left-arm orthodox spin, and the very rare left-arm unorthodox spin where left-handed bowlers use an action that mirrors a leg spinner.
- the required rotation for leg-spin is depicted in Figure 6.
- Good leg spin bowlers are also able to bowl deliveries that behave unexpectedly, including the googly, which turns the opposite way to a normal leg break, and the topspinner, which doesn't deviate significantly.
- a few exceptional leg spinners also mastered the flipper, a delivery that like a topspinner goes straight on landing but travels quickly and barely bounces on landing, often dismissing batters leg before wicket or bowled.
- Left-arm orthodox spin Left-handed with finger spin technique.
- left-arm orthodox spin is the equivalent of off spin bowling, but bowled with the left hand.
- the ball spins away from a right-handed batsman, like leg spin. It is usually considered to be harder for a right-handed batsman to play against than off spin, but easier to bat against than leg spin due to the (generally) smaller repertoire of delivery types.
- a spin bowler uses their wrist or finger motion to impart spin to the ball around a horizontal axis that is at an oblique angle to the length of the pitch.
- This sort of spin means it is also possible for the Magnus effect to cause the ball to deviate sideways through the air, before it bounces. Such deviation is called drift.
- drift The combination of drift and spin can make the ball's trajectory complex, and with a change of direction at the bounce can make it difficult for the batsman to deal with.
- Seam bowling is also a technique used for bowling in the sport of cricket.
- Seam bowling is generally classed as a subtype of fast bowling, although the bowling speeds at which seam bowling can be a used medium-pace bowling.
- a seam bowler delivers the ball with the seam held upright, with rotation about a horizontal axis. This keeps the seam aligned vertically as it travels towards the batsman, making it likely that the ball will bounce with the seam on the pitch.
- Swing bowling is a further skill of bowlers.
- the essence of swing bowling is to get the cricket ball to deviate sideways as it moves through the air towards the batsman. This is largely achieved by: . the raised seam of the cricket ball . imparting a small amount of spin down the back of the ball
- the asymmetry of the ball is encouraged by the constant polishing of one side of the ball by members of the fielding team, while allowing the opposite side to deteriorate through wear and tear. Over time, this produces a marked difference in the aerodynamic properties of the two sides.
- swing of a cricket ball is not caused by the Magnus effect, which gives rise to a force perpendicular to the axis of rotation (in this case up or down).
- the swing of a cricket ball is parallel to the axis of its rotation.
- a swing bowler aligns the seam and the sides of the ball to reinforce the swing effect. This can be done in two ways:
- Outs winger By aligning the seam to the left and placing the roughened side of the ball on the left, the ball will swing to the left. To a right-handed batsman, this results in the ball moving away to the off side while in flight, usually outwards from his body. • Ins winger: By aligning the seam to the right and placing the roughened side of the ball on the right, the ball will swing to the right. To a right-handed batsman, this results in the ball moving into the on/ leg side while in flight, usually inwards towards his body.
- Reverse swing Normal swing occurs mostly when the ball is fairly new. As it wears more, the aerodynamics of the asymmetry change and it is more difficult to extract a large amount of swing.
- Reverse swing tends to be stronger than normal swing, and to occur late in the ball's trajectory. This gives it a very different character to normal swing, and because batsmen experience it less often they generally find it much more difficult to defend against.
- the following discussion regarding the sports training ball uses the specific example of such a ball for the purpose of assisting the training of a bowler in the game of cricket.
- a sports training ball according to the invention will preferably have the following characteristics.
- outer spherical circumferential surface material should preferably be leather with a slightly raised sewn seam. This however doesn't restrict its manufacture only to only using leather as the outer material.
- imitation balls or composite balls are often produced to reduce cost and increase longevity compared with the cost and durability of a leather cricket ball.
- Alternative materials for the manufacture of a sports training ball include rubber and plastic and combinations of those materials and others.
- the plastic version of the sports training ball could be injection moulded or even spin moulded.
- the types of plastics that may suit are any of a class of plastics based on acrylonitrile-butadiene-styrene copolymers ABS and others as deemed suitable.
- the width of the circumferential surface should be at least, in a practical sense two if not three fingers width. However, in view of the uncertainty and lack of standards when it comes to what is a width of a finger, it is preferable only, that the width of the sports training ball be at least two fifths of the diameter of the substantially spherical circumferential surface of the sports training ball. Clearly it is preferable for the bowler to be able to use all the required grips on the ball which in some cases requires the use of two or three fingers side by side positioned over or about the seam. Such a configuration of the sports training ball is necessary to allow the full range of bowling grips to be used, otherwise the practice variations and types of bowlers that could use the sports training ball is restricted.
- the opposing side surfaces of the sports training ball can be of material or shaped surface (curved, undulating, roughened, etc) that causes differential air pressures (when bowled) based on the surface properties of the sides.
- the sides of the sports training ball should not regularly come into contact with the ground, thus, it would be hard to produce surfaces with different properties through use alone in a practice environment. It is for this reason that the manufacture of a sports training ball can provide these differences in material and surface on one or both (each side may be different) opposed side surfaces and therefore reduce or eliminate the need for practitioners to artificially create those conditions on a sports training ball that does not have them.
- the provision of such features is not obligatory and is merely an option.
- the weight of the sports training ball should be similar to that of the normal ball, inclusive of whether it is a junior or senior ball. Also preferably, along with the weight the distribution of the weight should be such that it does not adversely affect the spinning properties of the ball. That is, the density of the ball may need to be made consistent throughout or distributed in a manner that provides the closest match to a match ball's characteristics when being bowled.
- the sports training ball may be beneficial to produce with slightly different characteristics from those listed above.
- Features such as the seam of the ball, the rigidness of the ball, the dimensions of the ball and the texture of the ball may all differ according to different circumstances. These circumstances may include different climates in which the ball will be used, level of standard of the user, cost, age of participants, etc this being a non-exhaustive list.
- the seam 81 is depicted pictorially on Figure 8 and also shown pictorially on other figures, and may on the sports training ball include a raised area or multiple projections arranged to mimic the shape and configuration of a cricket ball seam. Variations of the seam configuration will be used to suit the particular sport being practiced.
- the outermost circumferential region is spherical and in the cricket ball embodiment the size of the spherical shape conforms to that of an appropriate regulation cricket ball although in Figures 8a and 8b this region is shown as being cylindrical for clarity of illustration only.
- the sides 83 and 84 are substantially planar but this means that they may be slightly convex or concave and may have on at least one side roughening surface features such as projections (not shown).
- the practice sports ball is able to assist in identifying whether all the correct attributes of 'swing' bowling and 'spin' bowling are achieved as it provides significantly increased visible feedback to both users and coaches in comparison to the use of a 'normal' cricket ball.
- the usage of the sports training ball should closely mimic that of the 'normal' cricket ball including grip and method of delivery.
- Figure 9 depicts a pictorial representation of the sports training ball being used to practice swing bowling.
- Figure 10 depicts the sports training ball being used to practice spin bowling in all its variations as described herein and as may be developed by training and instructional persons.
- the orthodox grip is two fingers up and two down, with the split between the second and third fingers, which are spread across the seam.
- the top joints of the index and second fingers lie across the seam, the third finger is bent and along the seam.
- the thumb rests on the ball and does not contribute to the action imparted to the ball.
- the orthodox grip for the off spinner is a two finger grip, with the first joints of the index and middle fingers spread widely on the seam. Ideally the thumb should not apply any pressure onto the ball. Spin is imparted primarily through the index finger. Rotations are imparted by a turn of the wrist.
- the grip on the ball is depicted in Figure 14. Although the picture illustrates a conventional cricket ball, the same grip can be used on a sports training ball as described herein.
- the sports training ball can be used in both skillpractising drills and in full, game-like practising situations.
- Some skill practising drills would include kneeling on the ground and spinning the ball with an underarm action in order to see the direction and stability of the spin.
- the bowler grips the disc, and draws their bowling hand past their hips, keeping their palm facing a partner located opposite them. As their arm swings forward, they straighten their fingers and flick their wrist so that their palm finishes facing down. Spin is imparted primarily through their third finger.
- the weight, surface texture and circumference of the sports training ball should be a true or a close representation of the sport ball it is relevant to.
- the sports training ball should also have similar flight and bounce characteristics to the sport ball it is representing. When that involves sports for different ages and levels, possibly different substances and sizes can be used in order to achieve this requirement.
- the user of the practice ball will place the disc of the sports training ball with a vertical orientation on the golf tee, wherein the substantially parallel sides have a vertical orientation with respect to the ground and the plane of each side points in the direction the user wishes to hit the sports training ball.
- the disc will not travel in the desired direction as the direction of force imparted to the ball by the club face is not in line with the desired direction of the ball, therefore providing immediate feedback to the golfer.
- Having the disc pointing in the direction they wish to hit before it is struck provides a very visual cue (or instruction) as to the direction the club face needs to travel when it impacts against the ball.
- the golfing and cricket applications of the sports training ball are merely examples.
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Professional, Industrial, Or Sporting Protective Garments (AREA)
- Rehabilitation Tools (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2005316194A AU2005316194B2 (en) | 2004-12-13 | 2005-12-13 | Method and apparatus for assisting the user of a sports ball to use spin |
NZ555550A NZ555550A (en) | 2004-12-13 | 2005-12-13 | Method and apparatus for assisting the user of a sports ball to use or avoid spin by using a disc shaped ball |
GB0711273A GB2435586B (en) | 2004-12-13 | 2007-06-12 | Method and apparatus for assisting the user of a sports ball to use spin |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2004907062 | 2004-12-13 | ||
AU2004907062A AU2004907062A0 (en) | 2004-12-13 | Method and apparatus for assisting the user of a sports ball to use spin |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006063391A1 true WO2006063391A1 (en) | 2006-06-22 |
Family
ID=36587449
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2005/001879 WO2006063391A1 (en) | 2004-12-13 | 2005-12-13 | Method and apparatus for assisting the user of a sports ball to use spin |
Country Status (4)
Country | Link |
---|---|
GB (1) | GB2435586B (en) |
NZ (1) | NZ555550A (en) |
WO (1) | WO2006063391A1 (en) |
ZA (1) | ZA200705731B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITVI20090038A1 (en) * | 2009-02-25 | 2010-08-26 | Giacomo Bouabdali | SHAPED BODY EMPLOYABLE FOR THE PRACTICE OF SPORTS DISCIPLINES. |
US20220401798A1 (en) * | 2021-04-23 | 2022-12-22 | Spindr Sports Llc | Non-spherical and mass shifted athletic training ball |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3865378A (en) * | 1970-09-28 | 1975-02-11 | William B Mcphail | Bowl for table type game |
US4286783A (en) * | 1978-10-25 | 1981-09-01 | Newcomb Nelson F | Practice baseball |
US4919422A (en) * | 1989-07-06 | 1990-04-24 | Tonka Corporation | Curve ball |
US6264574B1 (en) * | 1998-03-20 | 2001-07-24 | Play Visions, Inc. | Game ball and method of using game ball |
-
2005
- 2005-12-13 WO PCT/AU2005/001879 patent/WO2006063391A1/en active Application Filing
- 2005-12-13 NZ NZ555550A patent/NZ555550A/en not_active IP Right Cessation
-
2007
- 2007-06-12 GB GB0711273A patent/GB2435586B/en not_active Expired - Fee Related
- 2007-07-12 ZA ZA200705731A patent/ZA200705731B/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3865378A (en) * | 1970-09-28 | 1975-02-11 | William B Mcphail | Bowl for table type game |
US4286783A (en) * | 1978-10-25 | 1981-09-01 | Newcomb Nelson F | Practice baseball |
US4919422A (en) * | 1989-07-06 | 1990-04-24 | Tonka Corporation | Curve ball |
US6264574B1 (en) * | 1998-03-20 | 2001-07-24 | Play Visions, Inc. | Game ball and method of using game ball |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITVI20090038A1 (en) * | 2009-02-25 | 2010-08-26 | Giacomo Bouabdali | SHAPED BODY EMPLOYABLE FOR THE PRACTICE OF SPORTS DISCIPLINES. |
US20220401798A1 (en) * | 2021-04-23 | 2022-12-22 | Spindr Sports Llc | Non-spherical and mass shifted athletic training ball |
Also Published As
Publication number | Publication date |
---|---|
GB0711273D0 (en) | 2007-07-18 |
GB2435586A (en) | 2007-08-29 |
GB2435586B (en) | 2009-12-16 |
NZ555550A (en) | 2010-07-30 |
ZA200705731B (en) | 2008-09-25 |
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