Patent Application
20110111896
The present invention relates to foam game balls, in particular foam game balls designed to absorb water and release water through holes when thrown.
Foam balls for play are known in the art. Foam balls designed for safe play have been sold under the NERF trademark for many years. The NERF balls are generally made from polyurethane, which allows for the production of a relatively soft ball.
A foam ball designed for water play is disclosed in U.S. application Ser. No. 11/683,384. The foam ball of that invention has tubular holes which allow water to spray from the ball when the ball is soaked in water and subsequently thrown or kicked.
Generally, foam balls are constructed of solid foam, primarily for simplicity of manufacture. For non-water play or for smaller balls such construction is acceptable, and there is little to be gained from an alternative, more complicated construction. However, larger balls intended for water play, once fully soaked, became too heavy to allow for easy throwing.
It is an object of the current invention to provide for a foam ball that sprays water when soaked and subsequently thrown or kicked.
It is a further object of the current invention to provide for a ball that is of reasonable weight when fully soaked with water.
The current invention is a foam ball that has tubular holes to allow for water spray when the ball is soaked with water and thrown. Uniquely, for foam balls, it includes a non-absorbent core that has a lower average specific weight than that of the fully soaked foam. The core must be large enough to replace enough of the foam to reduce the total weight of the ball when fully soaked, but small enough for the layer of foam over the core to form the holes that spray water and to absorb sufficient water to effect the spray.
The invention can be applied to foam balls of various shapes, sizes, and designs, although the benefit would be greatest with larger balls intended for water play.
The ball 8 includes a form portion 18 that forms at least one and preferably a plurality of holes 14 that penetrate into the foam 18. Preferably, the holes 14 include at least one tubular section. The holes 14 can be directed toward a likely central point of rotation of the ball 8, for example, the center point of a spherical ball, thus providing a better release of water 16 when the foam 18 is soaked with water and the ball 8 is subsequently thrown or kicked. It will be noted that an additional cover (not shown) could be placed on the ball provided that the cover included holes aligned with the holes 14 in the foam 18 without adversely affecting the function of the invention. The foam may be made from polyurethane, but other materials could be used to produce an absorbent form.
The amount of foam 18 on the external surface of the ball 8, 30 needs to be sufficient to allow for enough water to be absorbed to produce a good spray of water from the holes 14, but must not be so great as to cause the ball to be unwieldy when subject to the increased weight of the fully saturated foam. It is also desirably for the holes to be of a minimum depth so as to allow for a good spray of water. Generally, the foam 18 should be of a depth of at least 0.75 inches so as to allow for holes 14 of a depth of at least 0.5 inches, although the invention will still function with a smaller depth of foam 18.
With reference to
In the embodiment shown, the holes 14 are substantially cylindrical, and form tubular holes where the cross-section of the hole remains essentially the same for the entire depth. It would be possible, however, to have only one or more sections of the hole 14, preferably at or near the surface of the foam 18, that are tubular. However, tubular holes 14 are both easy to manufacture and still allow for a good spray of water when the ball 8 is in use.
The holes 14 are generally directed toward the center of spherical ball 8 so as to allow for the maximum amount of centrifugal force to operate on the water, thus maximizing the spray.
With reference to
With reference to
In this embodiment, the core, 23 is composed of a non-absorbent outer layer 20 and a hollow inner portion 22 which can be filled with air or another gas. It should be noted that while this air or gas could be under pressure, as is typical in “real” footballs or other game balls, such pressurization is not essential in the case of the foam balls, since the purpose of the hollow section is to reduce the weight of the ball.
The invention may also be embodied in other specific forms without departing from the spirit or essential properties. The invention may be embodied in other specific forms without departing from the spirit or essential properties. Essentially, any game ball of whatever shape or design could be modified to include an absorbent foam exterior with holes designed to spray water when the foam is soaked and the ball is subsequently thrown, together with a core of lower specific weight than the fully-soaked foam. Further, multiple cores could be employed. It is therefore understood that this invention is not limited to the particular embodiments disclosed. The claims herein are intended to cover all obvious modifications thereof which are within the scope and the spirit of the invention defined in the above claims.
