Towel drill device and method of making same

Abstract

A sports training device for pitching and throwing has a ball core and a cover material. The core member defines a passageway extending through the ball core and also defines an anchor recess into a surface of the ball core. The anchor recess is aligned with and communicates with the passageway. A cloth member has a geometric shape with at least one corner and defining an attachment portion and a body portion extending away from the attachment portion. The attachment portion extends through the passageway and is attached to an anchor member sized to be received in the anchor recess. A cover material is installed over the ball core with the body portion of the cloth member extending through a cover opening and out from the ball core.

Claims

1. A sports training device for pitching and throwing comprising: a ball core having a substantially spherical shape and defining a passageway extending through the ball core from a first side to a second side opposite the first side, wherein the ball core defines an anchor recess in a surface of the second side of the ball core and extending transversely to and communicating with the passageway; an anchor member having a longitudinal portion received in the anchor recess and extending across and beyond the passageway; a cloth member having a geometric shape defining an attachment portion and a body portion extending away from the attachment portion and having at least one corner, wherein the attachment portion extends through the passageway from the first side and loops over the anchor member; a length of wire or string wrapped around the attachment portion of the cloth member adjacent the anchor member; and a cover material having a cover opening, the cover material disposed over the ball core with the cover opening opposite of the anchor recess and aligned over the passageway wherein the body portion of the cloth member extends out through the passageway and cover opening; wherein the anchor member fixedly secures the attachment portion of the cloth member to the ball core.

2. The sports training device of claim 1, wherein the attachment portion wraps around the longitudinal portion of the anchor member and a part of the attachment portion is fixedly attached to another part of the attachment portion.

3. The sports training device of claim 2, wherein the anchor member is selected from the group consisting of a rod, a bar, a hook, and a T.

4. The sports training device of claim 1, wherein the attachment portion extends through an anchor member opening defined in the anchor member.

5. The sports training device of claim 1, wherein the cloth member is made of cotton denim and has an area between about 230 and 250 square inches.

6. The sports training device of claim 1, wherein the ball core with attached cover material has a circumference of about 7.5 inches.

7. The sports training device of claim 1, wherein the training device has a weight less than 140 grams.

8. The sports training device of claim 1, wherein the attachment portion of the cloth member is one of the at least one corner of the cloth member.

9. The sports training device of claim 1, wherein the attachment portion of the cloth member is a length of material extending from the body portion.

10. A method of making a sports training device comprising: providing a ball core, a cloth member having an attachment portion and a body portion, an anchor member, and a cover member with a cover opening; defining a passageway through the ball core from a first side to a second side opposite the first side; defining an anchor recess in the surface of the second intersects the passageway; inserting the attachment portion of the cloth member through the passageway in the ball core; attaching the attachment portion to the anchor member by wrapping a length of wire or string around the attachment portion adjacent the anchor member; seating the anchor member in the anchor recess with the attachment portion attached thereto, with the anchor member extending across the passageway, and with the body portion of the cloth member extending out through the passageway away from the ball core; and installing the cover member over the ball core, wherein the body portion of the cloth member extends out through the cover opening; wherein the anchor member fixedly secures the attachment portion of the cloth member to the ball core.

11. The method of claim 10, wherein attaching the attachment portion to the anchor member comprises: selecting the attachment portion as a corner portion of the cloth member; wrapping the attachment portion around the anchor member; and securing the attachment portion to itself.

12. The method of claim 11, wherein the corner portion is selected to include a cloth strip extending across the corner portion, and wherein the step of wrapping the attachment portion around the anchor member includes positioning the anchor member between the cloth strip and the corner portion.

13. The method of claim 10, wherein the providing step includes selecting the anchor member from one of a bar, a rod, a T, and a hook.

14. The method of claim 10, wherein the providing step includes selecting the cloth member to be made of cotton denim and having an area from about 230 to about 250 square inches.

15. The method of claim 14, wherein the cloth member extends from the ball core by about 18 to 22 inches.

16. The method of claim 10, further comprising: inserting the attachment portion through a grommet; inserting the attachment portion through an opening defined in the cover member; and installing the grommet in the opening.

17. The method of claim 10, wherein the providing step includes selecting the ball core and the cover member to result in a circumference of about 7.5 inches when the cover member is installed on the ball core.

18. The method of claim 10, wherein the step of installing the cover member comprises: selecting a cover comprising a cover member first portion and a cover member second portion, wherein the cover member first portion defines the cover opening; inserting the attachment portion through the cover opening prior to the step of inserting the attachment portion through the passageway; aligning the opening over the passageway and opposite of the anchor recess; and stitching together the cover member first portion to the cover member second portion, thereby forming a substantially continuous cover over the ball core.

19. The method of claim 10, wherein the providing step includes selecting the ball core, the cloth member, the anchor member, and the cover member to result in an assembled weight of less than 140 grams.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 illustrates a perspective view of one embodiment of a training device of the present invention.

(2) FIG. 2A illustrates a plan view of an embodiment of a cloth member of the training device of the present invention.

(3) FIG. 2B illustrates a plan view of another embodiment of a cloth member of the present invention.

(4) FIG. 3 illustrates a plan view of another embodiment of a cloth member of the present invention showing an attachment strip extending from a body portion of the cloth member.

(5) FIG. 4 illustrates an elevational view of one embodiment of a ball core of the present invention showing a passageway and anchor recess formed in the surface of the ball core.

(6) FIG. 5 illustrates a perspective view showing assembly of the cloth member to the anchor member and ball core.

(7) FIG. 5A illustrates an elevational view showing the cloth member wrapped over the anchor member and secured with string wrapped around the cloth member.

(8) FIG. 5B illustrates an elevational view showing the cloth member wrapped with string and including the anchor member pierced through the wrapped portion.

(9) FIG. 6 illustrates an elevational view of the ball core shown with the cloth member attached to the anchor member, where the anchor member is seated in the anchor recess.

(10) FIG. 6A illustrates a section of a ball core showing the attachment portion of the cloth member fixed into a bore into the core with adhesive after being wrapped with string.

(11) FIGS. 7A-7H & 7J illustrate perspective views of exemplary embodiments of anchor recesses of the present invention.

(12) FIG. 8 illustrates a plan view of one embodiment of a cover member of the present invention, where the cover member includes a first cover member portion and a second cover member portion.

DETAILED DESCRIPTION

(13) Embodiments of the present invention are illustrated in FIGS. 1-8. FIG. 1 illustrates a perspective view of one embodiment of a training device 100 that includes a substantially spherical ball 110 and a cloth member 120 attached to ball 110 at an attachment portion 122. Cloth member 120 extends through a cover opening 113 through a cover material 114 on ball 110 and extends away from ball 110 to a distal end 121. In one embodiment, cloth member 120 is a single sheet of fabric or other material that is continuous across its dimensions without openings or cuts. This is unlike prior art streamers, frayed rope, or multiple strips of material that may be used in some throwing training devices. In one embodiment, cloth member 120 has at least two free corners 136 (i.e., not attached to ball 110.) In other embodiments, cloth member 120 has three, four, or five free corners 136. In one embodiment, distal end 121 coincides with one of the free corners 136.

(14) Referring now to FIGS. 2A and 2B, plan views illustrate exemplary embodiments of cloth member 120. In FIG. 2A, cloth member 120 has a rectangular shape; in FIG. 2B, cloth member 120 has a pentagonal shape. In both embodiments, the shape of cloth member 120 has attachment portion 122 for being secured to ball 110. In some embodiments, cloth member 120 includes a tab 124 extending diagonally across attachment portion 122 and spaced from attachment portion tip 122a. For example, tab 124 is a length of cloth tape about wide that extends across attachment portion 122, where tab 124 is spaced about three inches from attachment portion tip 122a. In the embodiment of FIG. 2A, tab 124 is stitched to and secured by edges 126a, 126b adjacent attachment portion 122. Tab 124 is useful for attaching cloth member 120 to an anchor member 190, which is discussed in more detail below.

(15) Cloth member 120 has a length L from attachment portion tip 122a to the furthest-located opposite edge 123 (as in FIG. 2B) or opposite corner 125 (as in FIG. 2A). That is, length L is the longest length in any direction from attachment portion tip 122a to an edge 123 or other corner 125 of cloth member 120. In one embodiment, cloth member 120 is a rectangle with a long side length A of 20 inches, a short side width B of 12 inches, and length L of about 23.3 inches from attachment portion tip 122a at one corner to the diagonally opposite corner 125. Optionally, the fabric edge is folded on itself to create a -wide cloth member edge 134 to prevent fraying. For example, the folded edge is then secured with two lines of thread stitching 136 spaced approximately 3/16 inch apart. Tab 124 is spaced from attachment portion tip 122 by about 3.2 inches. Thus, with tab 124 and attachment portion 122 installed into ball 110, cloth member 120 has an overall length of about 21 inches from cover opening 113 to the distal end 121 of cloth member 120 (shown in FIG. 1), where the overall length from ball 110 typically is shorter than length L across cloth member 120. A rectangular shape is desirable because it has been shown to be effective in creating an adequate amount of aerodynamic drag that, combined with ball 110, approximates the throwing force used with a regulation baseball. Further, when one corner is used to attach to ball 110, the rectangular shape has three free corners 136 that create aerodynamic drag in different directions during flight through the air. These free corners 136 prevent cloth member 120 from overly spreading out during flight by pulling against the air in various directions. The result is that cloth member 120 does not excessively fan out and traps air to provide resistance to the throwing motion.

(16) Referring now to FIG. 3, a plan view illustrates another embodiment of cloth member 120 where attachment portion 122 is an attachment strip 130 extending from a body portion 132 of cloth member 120. Attachment strip 130 may be a narrowed portion of cloth member 120 or may be a separate piece of material fixedly attached to and extending from body portion 132 of cloth member 120. In either case, attachment strip 130 has a width 130a significantly less than that of body portion 132, where width 130a is sized to be inserted into a passageway or bore 166 through ball core 160 (shown in FIG. 4) and attach to an anchor member 190 (shown e.g., in FIGS. 7A-7H), features which are discussed below. As with attachment portion 122 that is a corner 136 of cloth member 120, attachment strip 130 may be used to secure cloth member 120 to anchor member 190 (e.g., a dowel pin, shown in FIG. 7B), such as by wrapping it around anchor member 190 and then seating anchor member 190 in anchor recess 168. Cloth member 120 as shown in FIG. 3 has at least two free corners 136a, 136b. As cloth member 120 travels through the air, these free corners 136a, 136b provide aerodynamic drag. This effect results from the various free corners 136 creating drag against the air during flight, where the drag force on each free corner 136 is believed to occur in different directions as cloth member 120 travels through the air.

(17) In one embodiment, cloth member 120 has a weight of about 51 grams (about 1.8 oz.) and is made of cotton denim fabric weighing 10 oz./square yard. Weights of 45-55 grams and other weights for cloth member 120 are acceptable, depending on the desired training regimen. 10-oz cotton denim is chosen for its durability and for the resistance it provides to the throwing motion as it moves through the air. Being a relatively stiff fabric, but not overly stiff, the denim fabric substantially maintains a collapsed, collected shape and resists fanning out as it travels through the air. In contrast, stiffer fabrics tend to fan out during flight. Stiffer fabrics are also difficult to assemble with ball core 160 and anchor member 190. Lighter weight fabrics tend to trail behind the ball without fanning out, which results in failing to provide sufficient aerodynamic drag or sufficient weight desired by the user.

(18) Cloth member 120 is intended to withstand numerous repetitive practice motions. Cloth member 120 is also intended to withstand more extensive and significant wear if the user chooses to hit or slap cloth member 120 against a stationary object, such as a chair, wall, fence, baseball bat, or baseball glove. A cotton denim fabric as discussed above has shown to be sufficiently durable for these uses, yet sufficiently pliable for assembly with ball 110, and also providing the desired aerodynamic drag. Cotton denim fabric also has the desired thickness and weight so that cloth member 120 need not extend more than about two feet from ball 110. In one embodiment, for example, cloth member 120 extends about 18 to 22 inches from ball 110.

(19) In contrast to cloth member 120 as described herein, rope, plastic strips, nylon fabric and other materials either are too heavy, dense, or inflexible, or are too light, small, or wispy to provide adequate resistance (i.e., aerodynamic drag) to the user's throwing motion. When cloth member 120 includes too much fabric or has an overall length from ball 110 that is too long, cloth member 120 becomes unwieldy or provides too much resistance to mimic the user's throwing motion with a regulation baseball. Similarly, when cloth member 120 includes too little fabric or has an overall length from ball 110 that is too short, cloth member 120 provides too little resistance to mimic the user's throwing motion with a regulation baseball. Too much drag from cloth member 120 may strain the user's arm; too little drag from cloth member 120 may reinforce bad habits and improper technique. Specifically, training device 100 of the present invention is designed to teach or reinforce the proper follow through and movement at the end of the throwing motion. Devices having too little resistance accordingly fail to reinforce the important aspects of power and follow through at the end of the throwing motion.

(20) Aerodynamic drag (air resistance) increases proportionally to airspeed for laminar flow and proportional to the square of velocity for turbulent flow. In either flow regime, arms of different lengths and throwing motions of different speeds therefore generate different amounts of drag due to cloth member 120 traveling through the air. This is unlike throwing a regulation baseball where the resistance to the throwing motion is a fixed value based on the mass of the ball. The training device 100 of the present invention utilizes a lighter and smaller ball 110 combined with cloth member 120 that allows training device 100 to provide varying amounts of resistance to the throwing motion due to the aerodynamic drag being dependent on the throwing speed. Thus, young players as well as adult professional players may benefit from warming up and training with training device 100.

(21) Cloth member 120 made of cotton denim and sized as discussed above results in a mass, area, and overall length that provides a suitable resistance against the user's throwing motion. In other words, the force exerted by the user to move cloth member 120 through the air simulates the feel of throwing a regulation baseball, yet ball 110 and cloth member 120 together are lighter than a regulation baseball: in one embodiment, ball 110 and cloth member together weigh about 131 grams, which is less than the 142-149 grams of a regulation baseball. Cotton denim fabric is also desirable because it generates adequate, but not excessive aerodynamic drag as it is pulled through the air. Although this combination of performance and durability makes cotton denim fabric a desirable choice for cloth member 120, other materials available in sheet form are acceptable, such as chambray, leather, wool, and fabrics of natural and/or synthetic fibers.

(22) Referring now to FIG. 4, one embodiment of ball core 160 is shown as viewed axially looking through passageway or bore 166 extending therethrough and at anchor recess 168 formed into a surface of ball core 160. Passageway or bore 166 is shown as having a circular cross-sectional shape, but any cross-sectional shape is acceptable provided that attachment portion 122 of cloth member 120 can be inserted therethrough. In one embodiment, ball core 160 is made of a cork and rubber mixture, which is heated to create the core material. For example, core 160 is made of 10% rubber and 90% cork, and wrapped with string. Anchor recess 168 aligns with and intersects bore 166. Preferably, anchor recess 168 is centered on and oriented perpendicular to bore 166 as viewed axially in FIG. 4. In one embodiment, anchor recess approximates an elongated oval shape with a middle portion 169 positioned coincident with bore 166. Optionally, middle portion 169 is wider compared to end portions 170. In one embodiment, middle portion 169 has a width about equal to the diameter of bore 166. These various shapes allow anchor recess 168 to receive anchor member 190 with cloth member 120 wrapped around it and extending through bore 166. In one embodiment, middle portion 169 of anchor recess 168 is enlarged to accommodate cloth member 120 being wrapped around the center of the anchor 190.

(23) Referring to FIG. 5, a perspective view shows attachment portion 122 of cloth member 120 positioned for assembly with one embodiment of anchor member 190 and ball core 160. Here, anchor member 190 is a dowel pin or the like, which is shown enlarged for clarity. Prior to attaching attachment portion 122 to anchor member 190, attachment portion is extended through bore 166 of ball core 160. Anchor member 190 is then oriented transversely to attachment portion 122. In embodiments of cloth member 120 that include tab 124, anchor 190 may pass between tab 124 and cloth member 120. Attachment portion tip 122a then may be folded over anchor member 190 and secured to attachment portion, such as by stitching and/or wrapping with string. Excess material of attachment portion 122 then may be pulled back through bore 166 and anchor member 190 seated in anchor recess 168 with attachment portion 122 secured thereto.

(24) Referring to FIG. 5A, an elevational view shows attachment portion 122 folded or wrapped over anchor member 190. As shown in FIG. 5A, attachment portion 122 may be secured to itself by wrapping with wire or string 199 after folding or wrapping attachment portion 122 over anchor member 190. In other embodiments as illustrated in FIG. 5B, anchor member 190 is a nail or the like that pierces attachment portion 122 of cloth member 120. In such an embodiment, attachment portion 122 is optionally also wrapped with string 199 prior to or after inserting anchor member through attachment portion 122. Prior to piercing attachment portion 122, attachment portion 122 may be folded or bunched together to engage more layers of attachment portion 122.

(25) FIG. 6 illustrates cloth member 120 secured to ball core 160. Attachment portion 122 is wrapped around anchor member 190 with anchor member 190 being seated in anchor recess 168. Optionally, a piece of cloth tape (not shown) may be added over anchor recess 168 to smooth the area before cover material 114 is installed. FIG. 6A illustrates a sectional view of another embodiment in which attachment portion 122 is wrapped with string 199 and secured into bore 166 with adhesive 197. In such an embodiment, bore 166 is typically a blind bore extending approximately to the center of the ball. In one embodiment, string 199 is wrapped about 50 times around attachment portion 122. Adhesive 197 functions as anchor member 190 to retain attachment member in bore 166.

(26) Referring now to FIGS. 7A-7H and 7J, examples of anchor member 190 are illustrated. Anchor member 190 may be a bar (FIG. 7A), a rod (FIG. 7B), a cleat (FIG. 7C), T-shaped member (FIG. 7D), a hook or anchor hook (FIG. 7E), a flat washer (FIG. 7F), a plug (FIG. 7G), or other structure (FIG. 7H) to which cloth member 120 may be attached. As shown in FIGS. 7C, 7F-7H, and 7J, anchor member 190 in some embodiments includes an opening 193 or slot 194 to engage cloth member 120. When anchor member 190 is a washer or plug as illustrated in FIGS. 7F-7G, respectively, attachment portion 122 of cloth member 120 (shown, e.g., in FIGS. 2A-2B & 3) may be inserted through opening 193 and then knotted to prevent its passage back through opening 193. In one embodiment, anchor member 190 is a flat bar or cylindrical rod, such as illustrated in FIGS. 7A-7B, and sized to extend across bore 166 and seat in anchor recess 168. For example, anchor member 190 is a metal bar or rod with a diameter of 2 mm and length of 12 mm.

(27) As shown in FIG. 7C, anchor member 190 optionally includes a gripping outside surface 190a, such as protrusions or texture to engage and grip cloth member 120. Whatever the geometry of anchor 190, it has a dimension that prevents or may be positioned to prevent passage of anchor member 190 through bore 166, thereby anchoring cloth member 120 to ball core 160.

(28) Referring now to FIG. 8, one embodiment of cover material 114 is illustrated in a plan view. Consistent with a traditional regulation baseball, one embodiment of cover material 114 includes a first cover portion 114a and a second cover portion 114b, each of which generally has an oval shape with rounded ends 116 and a narrowed waist portion 118. When wrapped around ball core 160 and stitched together with rounded end 116 of first cover portion 114a abutting waist portion 118 of second cover portion 114b in a transverse orientation, first and second cover portions 114a, 114b combine to cover ball core 160. In one embodiment, cover portion 114 is made of leather and has cotton string stitching to secure first cover portion 114a to second cover portion 114b as in a traditional baseball. In one embodiment, cover material 114 is assembled with 96 tight, consistent stitches. These material choices simulate the look, feel, and texture of a regulation baseball. Other materials, shapes, and methods of assembling cover material 114 are acceptable.

(29) First cover portion 114a includes cover opening 113 approximately centered on end portion 117 of first cover portion 114a. As illustrated, cover opening 113 is a hole; however, cover opening 113 may be a slit, cut, or opening of another shape that permits cloth member 120 to exit from ball 110. In one embodiment, cover opening 113 is a hole centered widthwise, but is offset from end 116 compared to true center 117a of end portion 117. When assembled as shown in FIG. 1, cover opening 113 is positioned over a bore 166 through core 160. For comfort, visual appeal, and to prevent damage to cover material adjacent cover opening 113, an optional grommet 119 or the like may be installed in cover opening 113. In one embodiment, grommet 119 has an outer diameter of 16.5 mm and opening with diameter of about 10-12 mm.

(30) In one embodiment, ball core 160 has a diameter of about 55 mm and bore 166 has a diameter of about (12 mm). This size of ball core 160 results in ball 110 being smaller than a regulation ball, which typically has a diameter of 75 mm. After installing cover material 114, ball 110 has a circumference of about 7.5 inches (190 mm) and a diameter of about 60 mm. Compared to a regulation baseball, this smaller size allows the user to better grip the ball 110 by covering more of the ball with the user's fingers and palm. This smaller size of ball 110 also helps reduce strain and fatigue in the hand, wrist, forearm, elbow, and shoulder, by not requiring the user to grip the ball so tightly, especially for young players.

(31) The mass of ball 110 is also reduced compared to a regulation baseball, which is between about 142-148 grams. In one embodiment, ball core 160, cover material 114, and anchor 190 together weigh about 80 grams. Complete with a 51 gram cloth member 120, the total weight of training device 100 is about 131 grams. The lighter weight compared to a regulation baseball helps reduce strain on the user's arm. When the force of the aerodynamic drag (a variable value) due to cloth member 120 is added to the force needed to move the ball's weight, the resulting combination of forces is self-adjusting to the user based on varying throwing motions and throwing speeds of the user.

(32) It is contemplated within the scope of this invention that some embodiments of training device 100 have ball 110 that is heavier and/or larger than a regulation baseball. In yet other embodiments, cloth member is larger or smaller than described above as needed to achieve the desired aerodynamic resistance. For example, large and strong players may wish to train with an embodiment of training device 10 that includes a ball 110 heavier than a regulation ball and/or cloth member 120 significantly larger than the 1220 size discussed above.

(33) In use, the user of training device 100 grips ball 110 with opening 113 facing away from the user's hand. With the ball held this way, cloth member 120 extends through opening 113 and forward of the user's hand. A right handed user typically will hold the index finger extending along the curved part of the stitching at rounded end 116 of one of the cover members 114b. The user's middle finger will extend transversely between the two parallel seams along the narrowed waist 118 of the cover member 114b. A left handed user would rotate the ball 180 degrees for an equivalent grip. Other grips may be used as deemed appropriate by the user, such as a grip suited for throwing a fast ball or changeup pitch. The user holds training device 100 while moving the hand and arm through a typical throwing motion without releasing ball 110 from the user's grip. Since the user is not throwing a regulation baseball, which is larger and heavier, the lighter and smaller ball 110 may help avoid strain and excessive wear on the arm.

(34) The user's throwing motion with training device 100 typically is consistent with a pitching motion, but it may also replicate a regular baseball throw as well. Accordingly, a user of any size and skill level may develop and improve proper throwing and pitching technique, reinforce proper throwing mechanics, and improve arm speed and follow through. Training device 100 may also be used to strengthen and increase endurance in the user's arm through repetitive, practiced motions. Due to the minimal aerodynamic drag produced by cloth member 120, arm strain may be reduced as the user moves his/her arm at the user's own pace.

(35) Embodiments utilizing a smaller and lighter ball 110 compared to a regulation baseball have found that the arm is not fatigued as quickly. Using training device 100 helps pitchers improve accuracy and consistency by observing cloth member 120 to indicate throwing paths, direction, distance, reach, and general mechanics. These indications are greatly beneficial for pitchers, but training device 100 helps any player improve throwing mechanics and technique.

(36) Training device 100 encourages the user to reach out and extend the arm during the pitching or throwing motion as well as to focus on the length of the user's stride. In some cases the user intends to hit or slap cloth member 120 against a fixed object such as a fence, a wall, a chair, a baseball bat, or glove held in front of the user, or any other object positioned to require the user to reach to make cloth member 120 contact the object. Training device 100 reduces risk of injury by promoting a good follow through. A good follow through prevents an early release of the ball and over rotation of the arm, both of which strain the elbow and shoulder.

(37) Although the preferred embodiments of the present invention have been described herein, the above description is merely illustrative. Further modification of the invention herein disclosed will occur to those skilled in the respective arts and all such modifications are deemed to be within the scope of the invention as defined by the appended claims.