Patent Application
20080067751
The drawings illustrate the best mode currently contemplated of practicing the present invention.
In the drawings:
With reference now to the drawing figures in which like reference numerals designate like parts throughout the disclosure, a random rebound practice device constructed according to the present invention as indicated generally at 10 at
The support panels 12 and 14 each are formed with a U-shaped, tubular frame 20 that is formed of a rigid material, such as a metal or hard plastic. The frame 20 for each panel 12 and 14 is pivotally secured at opposite ends to each of a pair of bracket 18 through the use of a suitable fastener or pivot pin 22 fixedly attached to each of the brackets 18 and to which the U-shaped frame 20 is rotatably mounted. Further, while the frames 20 are illustrated as being generally U-shaped, the frames 20 can have other shapes, such as square or circular, among others, depending upon the particular use for the device 10. In addition, to provide added stability to the device 10, the brackets 18 are connected by a support bar 19 that extends between the brackets 18.
Each frame 20 also includes a net structure 24 secured thereto. The net structure 24 is preferably secured to the frame 20 using an attachment bar 26 that is fixedly secured along the inner periphery of the U-shaped frame 20. The attachment bar 26 is spaced from the inner periphery of the frame 20 by a number of supports 28 spaced along the length of the frame 20 and connected between the frame 20 and the bar 26. The bar 26 ad the supports 28 are also preferably formed of a rigid material, such as a metal or hard plastic, and most preferably are formed of the same material as the frames 20 to facilitate the attachment of the supports 28 to the frame 20, and the bar 26 to the supports 28.
The net structures 24 each include a number of loops 30 formed around the periphery of the net structure 24 and through which the bar 26 is inserted in order to attach the net structure 24 to the frame 20. The loops 30 extend outwardly from the net structure 24 along an elastic net support line 32 positioned around the entire periphery of the net structure 24. The support line 32 is formed of a resilient and elastic material and functions to tension the net structure 24 across the frame 20. The elasticity of the support line 32 enables the net structure 24 to deflect or deform when struck by a projectile 100. After the initial deflection, the elastic bias of the support line 32 causes the line 32 to move back to its original position and urge the net structure 24 to its original position as well. This consequently exerts a rebound force on the projectile 100 that has struck the net structure 24 to send the projectile 100 back towards the individual. Depending upon the amount of tension inherent in the material forming the line 32, applied to the support line 32 during assembly, or to which the line 32 is adjusted using a suitable adjustment mechanism (not shown), the rebound force exerted by the net structure 24 on the projectile 100 can be made greater or lessened. In a preferred embodiment of the present invention, the support line 32 is formed to exert a tensioning force on the net structure 24 that can be greater than that found in prior art rebound net structures. This increased tension on the net structures 24 supplied by the support line 32 enhances the ability of the net structure 24 to rebound a ball striking the net structure 24 in a random manner. Further, in configurations for the device 10 including multiple net structures 24 on the target panel 16 creates even more tension in the target panel 16, enhancing even further the random rebound characteristics of the device 10.
Each net structure 24 further includes a number of strands 34 of any suitable material, such as rope, nylon, or the like, that extend across the net structure 24 and are fixed to the net support line 32 at opposite ends. The strands 34 can be secured at opposite ends to the net support line 32 in any configuration in order to define openings 36 of any desired shape between adjacent strands 34. However, the strands 34 are preferably oriented in a perpendicular configuration in order to form openings 36 that are generally square in shape. Most preferably, the openings 36 formed between the strands 34 are square in shape, and have dimensions of at least 2 inches by at least 2 inches. This dimension for the openings 36 in the net structures 24 is larger, i.e., about twice the size, than the dimension for openings found in prior art rebound nets, and allows for a greater portion of the ball or projectile 100 striking the net structure 24 to enter the opening 36. More preferably, the size of the openings 36 is between about 1.500 inches and about 3.000 inches in width, and more preferably between about 1.625 inches about 2.500 inches in width, and most preferably the openings 36 are square in shape. Because more of the projectile 100 enters the opening 36, the projectile 100 is rebounded off of the net structure 24 in a random manner.
The strands 34 are joined to one another at the points of intersection 37 of the respective strands 34 to maintain the position of the strands 34 with respect to one another and keep the shape and relative size of the openings 36 defined therebetween. While the connections at the intersections 37 can be made using any suitable means, such as an adhesive or mechanical fastener, preferably the stands 34 are interconnected by weaving and/or winding the threads 34 around one another as they are extended across the net structure 24, as is known in the art. By winding the strands 34 around one another at the points of intersection 37, this manner of interconnection of the strands 34 forms knobs 200 at the points of intersection 37 that can further assist in the functioning of the net structure 24 in a manner to be described.
In a preferred embodiment, each net structure 24 secured to the frames 20 on the support panels 12 and 14 is formed to have a length sufficient to enable the net structure 24 to extend from the support panels 12 and 14 to which it is secured around the support bar 19 and onto the target panel 16. However, the net structure 24 on the target panel 16 can also be formed of a single net structure 24 that extends from one or the other of the support panels 12 or 14, or that is only secured to the target panel 16 with its own associated support line 32.
The target panel 16 is formed similarly to the support panels 12 and 14 with a tubular, U-shaped frame 20 including the attachment bar 26 and supports 28 thereon to secure the net structures 24 from the support panels 12 and 14 thereto. However, in the preferred embodiment, when each of the net structures 24 from the support panels 12 and 14 are positioned on the attachment bar 26 on the target panel 16, the net structures 24 are located in an overlapping configuration with respect to one another on the target panel 16. In addition, the net structures 24 are attached to the target panel 16 in an offset configuration, such that the openings 36 formed in each net structure 24 are not aligned with one another, as best shown in
In addition, as stated previously, the size of the openings 36, which allow larger portions of the projectile 100 to avoid striking the net structures 24, and the irregular shapes of the intersections 37 formed in the respective structures 24 further lessens the potential of the projectile 100 striking the exact same location and portions of the net structure 24. The random rebound properties of the device 10 can also be altered as desired by attaching one or more net structures 24 to the various panels 12-16 of the device 10 that have larger, and similar or different sized openings 36, or which have openings 36 with different shapes or configurations. Also, in conjunction with the larger openings 36, the tension applied to the net structure(s) 24 by the support line(s) 32 enhances the random rebound characteristics of the device 10 as well. The elastic characteristics of the support lines 32 used in each of the net structures 24 can be varied to tension the net structures 24 as desired to provide differing rebound forces from each of the net structures 24.
Because the net structures 24 are each positioned by themselves on each of the support panels 12 ad 14, each of these panels 12 and 14 can also function as a random rebound surface similarly to the target panel 16 and may direct any projectiles 100 that rebound off of the target panel 16 in a random direction in a direction back to the individual. However, these support panels 12 and 14 may also be configured with the net structures 24 thereon to function solely as a return surface for projectiles 100 striking these panels 12 and 14.
Looking at
In the storage configuration, the support panels 12 and 14 are positioned generally parallel to and on opposite sides of the target panel 16. The support panels 12 and 14 can be held in this configuration utilizing a pair of braces 40 disposed on opposite sides of the device 10 and pivotally secured at each side to one of the panels 12 or 14. The braces 40 are rotatably connected to a pin 42 disposed on the frame 20 of one of the support panels 12 and 14 and can be selectively engaged with a locking pin 44 located on the opposite panel 12 or 14. In addition, the braces 40 can be connected between the frames 20 of the support panels 12 and 14 when the device 10 is in the use configuration as shown in
In order to allow the target panel 16 to be adjusted to provide the desired rebound angles for the projectile 100 striking the target panel 16, the target panel 16 may also be pivotably connected to each bracket 18, as shown in
Looking now at
Various other configurations and alternative embodiments of the present invention are contemplated as being within the scope of the following claims particularly pointing out and distinctly claiming the subject matter regarded as the invention.
