Balls used in playing and training for sporting games, and in particular, balls that are struck or kicked by players of the games.
Many sporting games are based on play with a ball. The ball may be spherical (e.g., golf, tennis, baseball, softball, soccer, volleyball), or oblong (e.g. rugby, American football). The ball may be joined to the top of a rod, or suspended under a horizontal plate; such a ball configuration is commonly known as a punching bag, and is used in training for boxing and other defensive arts. From levels of youths to adults, players are motivated to practice and improve their level of play. In all types of ball games, training to improve play involves repetitive drills based on imparting motion of the ball, whether it is by kicking, hand striking, or implement striking with a bat, club, racket or other implement of the sport
Typically in such sports, in all such sports, players ranging from young children through professional athletes are taught to “hit through the center of the ball,” or to “aim for the center of the ball” in their training exercises and during play. However, taking an action to hit through the ball or to “aim for its center is difficult, because in general, all sports balls are non-transparent objects, and thus the center of any given ball cannot be seen. For practice and training in any particular ball-based sport, what is needed is a ball having substantially the same properties as a regular ball of the sport, but having a transparent external skin and a visible center core.
Balls provided in accordance with the present disclosure meet this need. In a broad aspect, the balls are visualization tools having the form, size, feel and weight of the balls of the respective sports. They are comprised of a clear outer material and an opaque center approximately 5-25% the size of the standard ball exterior. The opaque “core” provides the player with a focal point upon which to concentrate attention as he/she hits, kicks or catches the ball in training exercises or general play.
In one aspect of the present disclosure, a sports ball is provided comprising a transparent outer wall surrounding a hollow cavity and defining a geometric center, and a central core object suspended at the geometric center of the hollow cavity. In certain cases, the ball may have the shape of a sphere having a center point, with the central core object suspended at the center point of the sphere. In other cases, the ball may be oblong or ellipsoid, with the central core object suspended at the center points of the respective major and minor axes of the ellipsoid. In a spherical ball, the ratio of the diameter of the ball to the diameter of the central core object is preferably between 2:1 and 20:1, depending upon the size of the ball and the needs in playing the particular sport. In certain cases, the transparent outer wall of the ball may be elastically deformable. In certain cases, the transparent outer wall of the ball may be comprised of a transparent inflatable bladder contiguous with an inner surface of a transparent outer skin. The transparent outer skin may be comprised of a plurality of outer facets joined together, such as by sewing.
In one version of the sports ball, the central core object may be suspended by a first elastic cord comprising a first end joined to the transparent outer wall, and a second end joined to the transparent outer wall and opposed to the first end. In another version, the central core object may be further suspended by a second elastic cord comprising a first end joined to the transparent outer wall, and a second end joined to the transparent outer wall and opposed to the first end, with the second elastic cord aligned orthogonal to the first elastic cord. In another version, the central core object may be further suspended by a third elastic cord comprising a first end joined to the transparent outer wall, and a second end joined to the transparent outer wall and opposed to the first end, with the third elastic cord aligned orthogonal to the first elastic cord and the second elastic cord.
In another version of the sports ball, the central core object may be suspended by a first elastic cord comprising a first end joined to the transparent outer wall, and a second end joined to the central core object, a second elastic cord comprising a first end joined to the transparent outer wall, and a second end joined to the central core object, a third elastic cord comprising a first end joined to the transparent outer wall, and a second end joined to the central core object, and a fourth elastic cord comprising a first end joined to the transparent outer wall, and a second end joined to the central core object. The first, second, third, and fourth elastic cords are operable to provide force vectors maintaining the central core object in position at the geometric center of the hollow cavity of the ball.
In another version of the sports ball, the central core object may be embedded at a center point of an elastic membrane joined to an interior surface of the transparent outer wall. The elastic membrane may bisect the hollow cavity of the ball into two equal volumes.
In another version of the sports ball, the ball is comprised of a transparent outer wall surrounding a hollow cavity and defining a geometric center, a transparent toroidal bladder contained within the transparent outer wall and having an outer wall portion contiguous with the transparent outer wall, and a central core object joined to a central wall portion of the transparent toroidal bladder, and suspended at the geometric center of the hollow cavity.
The present disclosure will be provided with reference to the following drawings, in which like numerals refer to like elements, and in which:
The present invention will be described in connection with certain preferred embodiments. However, it is to be understood that there is no intent to limit the invention to the embodiments described. On the contrary, the intent is to cover all alternatives, modifications, and equivalents as may be included within the spirit and scope of the invention as defined by the appended claims.
For a general understanding of the present invention, reference is made to the drawings. In the drawings, like reference numerals have been used throughout to designate identical elements. The drawings are to be considered exemplary, and are for purposes of illustration only. The dimensions, positions, order and relative sizes reflected in the drawings attached hereto may vary, and the dimensions and positions of objects are not necessarily to scale, but instead are shown to clearly illustrate basic principles of the present invention.
In the following disclosure, certain components may be identified with the adjectives “top,” “upper,” “bottom,” “lower,” “left,” “right,” etc. These adjectives are provided in the context of the orientation of the drawings, which is arbitrary. The description is not to be construed as limiting the balls disclosed herein to use in a particular spatial orientation. The balls of the present disclosure may be used in orientations other than those shown in the drawings.
It is also to be understood that any connection references used herein (e.g., attached, coupled, connected, and joined) are to be construed broadly and may include intermediate members between a collection of elements and relative movement between elements unless otherwise indicated. As such, connection references do not necessarily imply that two elements are directly connected and in fixed relation to each other.
The term “providing”, such as for “providing a bladder” and the like, when recited in the claims, is not intended to require any particular delivery or receipt of the provided item. Rather, the term “providing” is merely used to recite items that will be referred to in subsequent elements of the claim(s), for purposes of clarity and ease of readability.
Referring first to
A top cutting die 4T comprising a cutting edge 6T is moved vertically toward the folded sheet 10 as indicated by arrows 5, and towards a mating cutting base 4B. A cutting spacer 4S is disposed between the folds of the folded sheet 10. Referring to
Referring to
In one aspect of the present disclosure, the apparatus and steps shown in
Referring to
Referring to
After the finished transparent bladder is formed, it may then be covered with a transparent skin, which may be configured in a manner similar to a conventional ball of the particular sport for which the ball is being made. The transparent skin may be molded around the bladder, or formed by a film coating process. Alternatively, the transparent skin may be formed from individual transparent panels that are sewn together. For example, for a conventional soccer ball, the transparent skin may be made of an assembly of transparent panels comprising twelve pentagonal panels and twenty hexagonal panels joined by edge-to-edge sewing. A transparent skin of a conventional volleyball may be made of an assembly of eighteen rectangular panels joining by edge-to-edge sewing.
It is also to be understood that while the bladders and balls described above are spherical in shape, a bladder and ball of the present disclosure may be made with an oblong shape, such as for a rugby ball, or an American football. To make such oblong balls, the dies and vulcanizing fixtures are dimensioned as needed.
In forming a bladder of a ball of the present disclosure, a sheet 110 of transparent elastomer is folded and disposed between the upper die 204 and the lower die 254, with the central core object 130 and the elastic cord 140 contained within the folded sheet 110. (It is noted that an alternative folding pattern is shown in
As the upper and lower dies 204 and 254 are moved toward each other, portions of the folded sheet 110 and upper and lower halves of the central core object 130 are disposed in the respective upper and lower hemispherical cavities 205 and 255. The upper and lower dies 204 and 254 are moved toward each other until the cutting edge 206 of the upper die 204 is forced against the layers of folded sheet 110 and cutting spacers 204S, whereupon it cuts through them, and continues on until the cutting edge 256 of the lower die 254 contacts the cutting spacer 204 S. At least the upper die 204 and the lower die 254 (and optionally, the cutting spacer 204S) are heated such that the edges of the cut folded sheet are fused to form bladder seams as described previously. The upper and lower dies 204 and 254 may then be separated from each other by the actuator, and the die cut bladder removed from the dies 204 and 254. The resulting die cut bladder is substantially the same as the bladder 115 of
In other cases, the finished transparent bladder may then be disposed within a transparent outer skin as described previously. The combination of a finished transparent bladder and transparent skin made using the apparatus and methods of
The transparent outer wall 101 surrounds a hollow cavity and defines a geometric center. The central core object 130 is suspended at the geometric center of the hollow cavity by the elastic cord 140. The ball 100 may have the shape of a sphere having a center point, with the central core object suspended at the center point of the sphere as shown in
In the sports ball 100 as described above, the elastic cord 140 holds the center core object 130 at the geometric center of the ball when the ball is at rest. However, the center core object 130 may be displaced from its central position, either when the ball is struck or kicked in play, or when the ball is spinning or rolling. Referring to
Referring to
Another alternative sports ball 100C is shown in
In some respects, apparatus 300 is similar to apparatus 200 shown in
The upper die 304 includes a hemispherical cavity 305 slightly larger in diameter than the spherical central core object 130, and a cutting edge 306. The upper die 304 further includes a toroidal half-cavity 307, which surrounds the hemispherical cavity 305. The toroidal half-cavity 307 is bounded on its exterior by the cutting edge 306, and on its interior by an inner annular edge 308. In like manner, the lower die 354 includes a hemispherical cavity 355 slightly larger in diameter than the spherical central core object 130, and opposed to the hemispherical cavity 305 of the upper die 304. The lower die 354 further includes a toroidal half-cavity 357, which surrounds the hemispherical cavity 355 and is opposed to the toroidal half-cavity 307 of the upper die 304. The toroidal half-cavity 357 is bounded on its exterior by an outer annular edge 356, and on its interior by an inner annular edge 358.
In forming a bladder of a ball of the present disclosure, a sheet 110 of transparent elastomer is folded and disposed between the upper die 304 and the lower die 354, with the central core object 130 contained within the folded sheet 110 and the cutting spacers 304S disposed between the folds of the folded sheet 110. (The folding pattern may be as shown in
As the upper and lower dies 304 and 354 are moved toward each other, portions of the folded sheet 110 and upper and lower halves of the central core object 130 are disposed in the respective upper and lower hemispherical cavities 305 and 355. The upper and lower dies 304 and 354 are moved toward each other until the cutting edge 306 of the upper die 304 is forced against the layers of folded sheet 110 and cutting spacers 304S, whereupon it cuts through them, and continues on until the cutting edge 306 of the upper die 304 and the cutting edge 356 of the lower die 354 contact the cutting spacers 304S. At least the upper die 304 and the lower die 354 (and optionally, the cutting spacer 304S) are heated, such that the edges of the folded sheet that are cut by the cutting edges 306 and 356 are fused to form an outer bladder seam in the same manner as described previously. Additionally, the inner annular edge 308 of the upper die 304 and the inner annular edge 358 of the lower die 354 are brought in close proximity to each other. However, these edges are slightly recessed with respect to the cutting edge 306 and outer annular edge 356, such that they do not cut through the layers of folded sheet with which they are in contact. Instead, the inner annular edge 308 of the upper die 304 and the inner annular edge 358 of the lower die 354 compress and fuse the layers of folded sheet between them together, and also bond the layers to the central core object 130 along its maximum diameter.
The upper and lower dies 304 and 354 may then be separated from each other by the actuator, and the die cut toroidal bladder removed from the dies 304 and 354. The die cut toroidal bladder may then have a valve (not shown) fitted to it, and be placed in a vulcanizing fixture (not shown) with a toroidal cavity having the desired final shape of the toroidal bladder. The toroidal bladder may be inflated to the toroidal shape of the cavity of the fixture, and vulcanized to form a finished transparent toroidal bladder 310 having a transparent outer wall and embedded central core object 130, as shown in
The finished transparent toroidal bladder 310 may then be fully inflated and disposed in a suitable transparent outer skin 101, at which time it conforms to the spherical shape of the outer skin 101, resulting in the sports ball 100C and 100D of
The following materials may be used as transparent elastomeric materials that are suitable for forming the bladders and outer skins of the sports balls of the present disclosure. These materials are to be considered exemplary and not limiting. Other materials are contemplated. Center core objects are preferably made of lightweight materials such as hollow polymer forms, polymer foam, cork, or wood. Bladders and outer skins may be made of transparent latex, silicone, or polyurethane elastomer. Additionally, outer skins may be made of transparent polyvinyl chloride polymer. As used herein, “transparent” for the purposes of the balls of the present disclosure means sufficiently light transmissive such that the center core of a ball held within the bladder and outer skin is visible to an observer of the ball. The materials do not necessarily need to be optically as clear as common glass, and may have a hazy appearance from some light scattering, while still enabling the center core of a ball to be seen by an observer.
It is therefore apparent that there has been provided, in accordance with the present disclosure, a sports ball, and methods and apparatus for fabrication of the sports ball. The foregoing description of technology and the invention is merely exemplary in nature of the subject matter, manufacture, and use of the invention and is not intended to limit the scope, application, or uses of any specific invention claimed in this application or in such other applications as may be filed claiming priority to this application, or patents issuing therefrom. The following definitions and non-limiting guidelines must be considered in reviewing the description.
The description and specific examples, while indicating embodiments of the technology disclosed herein, are intended for purposes of illustration only and are not intended to limit the scope of the technology. Moreover, recitation of multiple embodiments having stated features is not intended to exclude other embodiments having additional features, or other embodiments incorporating different combinations of the stated features. Specific examples are provided for illustrative purposes of how to make and use the compositions and methods of this technology and, unless explicitly stated otherwise, are not intended to be a representation that given embodiments of this technology have, or have not, been made or tested.
To the extent employed herein, the words “preferred” and “preferably” refer to embodiments of the technology that afford certain benefits, under certain circumstances. However, other embodiments may also be preferred, under the same or other circumstances. Furthermore, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, and is not intended to exclude other embodiments from the scope of the technology.
Unless otherwise specified, relational terms used in the present disclosure should be construed to include certain tolerances that those skilled in the art would recognize as providing equivalent functionality. By way of example, the term perpendicular is not necessarily limited to 90.00°, but also to any variation thereof that those skilled in the art would recognize as providing equivalent functionality for the purposes described for the relevant member or element. Terms such as “about” and “substantially” in the context of configuration relate generally to disposition, location, and/or configuration that is either exact or sufficiently close to the location, disposition, or configuration of the relevant element to preserve operability of the element within the invention while not materially modifying the invention. Similarly, unless specifically specified or clear from its context, numerical values should be construed to include certain tolerances that those skilled in the art would recognize as having negligible importance, as such do not materially change the operability of the invention.
As used herein, the words “comprise,” “include,” contain,” and variants thereof are intended to be non-limiting, such that recitation of items in a list is not to the exclusion of other like items that may also be useful in the materials, compositions, devices, and methods of this technology. Similarly, the terms “can” and “may” and their variants are intended to be non-limiting, such that recitation that an embodiment can or may comprise certain elements or features does not exclude other embodiments of the present technology that do not contain those elements or features.
Having thus described the basic concept of the invention, it will be apparent to those skilled in the art that the foregoing detailed disclosure is intended to be presented by way of example only, and is not limiting. Various alterations, improvements, and modifications will occur to those skilled in the art, though not expressly stated herein. These alterations, improvements, and modifications are intended to be suggested hereby, and are within the spirit and scope of the invention. Additionally, the recited order of processing elements or sequences, or the use of numbers, letters, or other designations therefore, is not intended to limit the claimed processes to any order except as may be expressly stated in the claims.
This application claims the benefit of U.S. Provisional Patent Application No. 62/902,983 filed Sep. 20, 2019, the disclosure of which is incorporated herein by reference. The above benefit claim is being made in an Application Data Sheet submitted herewith in accordance with 37 C.F.R. 1.76 (b)(5) and 37 C.F.R. 1.78.
Number | Date | Country | |
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62902983 | Sep 2019 | US |