Patent Application
20050064964
This invention relates to sports equipment handles in general and, more particularly, to cushion and grip ribs for the handles of lacrosse and hockey sticks.
Handles for sports equipment such as, for example, hockey sticks and lacrosse sticks are often polygonal in shape and thus incorporate elongate edges or corners thereon defining ribs on the handle which provide a player with an improved grip and control of the handle. A disadvantage associated with these handles, however, is the increased risk of bodily injury and, particularly, the risk of lacerations which can, and do in fact occur, when the sticks are swung about in the normal course of play and the edges strike, for example, the face of another player. Another disadvantage is the risk of damage to the handles from stick to stick contact during play.
This invention is directed to a handle for sports equipment and, more particularly, to a handle for a hockey stick or lacrosse stick incorporating variously configured ribs, including interiorly protruding ribs, adapted to cover and cushion the edges thereof and further improve a player's grip of the handle.
The invention relates generally to a sports equipment handle and, more particularly, to a handle for a lacrosse stick comprising an elongate shaft made of a first material and including at least one region of reduced diameter or thickness and a cover made of a second material and surrounding the shaft in a manner whereby the outer diameter of the handle including the cover is substantially uniform and the cover includes at least one region of increased thickness in the region of the shaft having the reduced diameter or thickness.
In one embodiment, the shaft includes a tapered end portion defining the region on the shaft of reduced diameter or thickness and is adapted to extend into the head of a lacrosse stick so as to define a region on the handle having improved whip and flex characteristics while simultaneously preserving the outer uniform polygonal geometry of the handle.
In another embodiment, the regions of reduced diameter or thickness define respective elongate longitudinal grooves formed in the shaft and a co-extrusion process is used to fill the respective grooves with the second material to define interior ribs which do not affect the outer polygonal geometry or diameter of the handle. In another embodiment, elongate ribs protrude unitarily outwardly from the interior surface of a separate one-piece cover and the cover is fitted and secured to the shaft in a relationship where the ribs fill the respective grooves.
In still another embodiment, the shaft includes exterior and interior surfaces and the edges define elongate longitudinal slits through which ribs extend.
In a further embodiment, the edges protrude outwardly from the exterior surface of the shaft and the ribs include respective interior surfaces configured to abut against the respective edges and an adhesive secures the ribs to the respective edges.
In still a further embodiment, the shaft and ribs include interior and exterior surfaces respectively and the ribs protrude unitarily outwardly from the exterior surface of one-piece elongate cover which is shrink-wrapped to the shaft. In this embodiment, the ribs are spaced from edges of the shaft and define air-filled cushion chambers in the region of the respective shaft edges.
In the accompanying drawings forming part of the specification in which like numerals are employed to designate like parts throughout the same:
The invention disclosed herein is, of course, susceptible of embodiment in many different forms. Shown in the drawings and described herein below in detail are preferred embodiments of the handle of the present invention. It is to be understood, however, that the present disclosure is an exemplification of the principles of the invention and does not limit the invention to the illustrated embodiments.
It is also understood that the FIGURES herein do not necessarily show details of the handle that are known in the art and that will be recognized by those skilled in the art as such. The detailed descriptions of such elements are not necessary to an understanding of the invention. Accordingly, such elements are herein represented only to the degree necessary to aid in an understanding of the features of the present invention.
As shown in
Shaft 26 is further characterized in that the exterior surface 28, in the regions between each of the exterior faces thereof, defines a plurality of elongate and longitudinally extending arcuate and concavely shaped grooves, depressions, dimples or recessed edges 50. Edges 50 extend around the exterior shaft surface 28 in spaced-apart and parallel relationship.
Handle 24 further comprises a unitary coat or cover 52 which surrounds and overlies the exterior shaft surface 28 and, more particularly, each of the respective polygonal faces thereof. Cover 52 preferably comprises a soft, pliable, resilient, deformable, impact-absorbing and tacky thermoplastic material including any suitable elastomers and rubbers such as, for example, Santoprene™. Cover 52 includes a generally flat outer surface 53 defining a plurality of longitudinally extending edges or corners 54 which overly the recessed edges 50 defined in the exterior shaft surface 28.
Although the cover 52 may be either a pre-formed, pre-molded member or an overlay applied directly to the outer surface 28 of the shaft 26 using any one of several known processes including casting, interference fitting, spraying, injection molding, rotational molding, insert molding or over molding, one embodiment of the present invention encompasses the use of a Sticktrusion™ process in which the material comprising the cover 52 is co-extruded onto the exterior shaft surface 28. The process initially entails connecting a plurality of the shafts 26 along the proximal and distal ends thereof with plugs to create an extended and continuous length of shaft material. Thereafter, a feeder pushes the shafts through a stationary heater station which activates the surface energy of the shafts. The shafts are then passed or fed directly through and into the interior of a stationary crosshead extrusion die corresponding in shape to the octogonal shape of the cover 52 and including circumferentially positioned ports adapted to deposit thin layers of the material comprising the cover 52 directly onto the faces of the exterior shaft surface and into the recesses 50 defined in the exterior shaft surface 28. The shafts are then passed through the interior of a stationary cooling station where the material comprising the cover 52 is cured. The shafts are then separated about the plugs thereof.
In accordance with the invention, the presence of the longitudinal recessed edges 50 in the exterior shaft surface 28 defines longitudinal strips in the region of the recessed edges 50 wherein the thickness of the material comprising the cover 52 is greater than the thickness of the cover material overlying the flat outer surface of each of the exterior polygonal faces thereof. As a result, in the embodiment wherein the cover 52 comprises a layer of material which is applied to the shaft using the Stricktrusion™ process, the recessed edges 50 in combination with the material comprising the cover 52 together define a plurality of elongate longitudinally interiorly extending and protruding cushioning ribs 56 which fill and overly the recessed edges 50 defined in the exterior shaft surface 28 while advantageously preserving the outer octogonal geometry of the cover 52 and thus the handle.
In the embodiment where the cover 52 is a separate, pre-formed and pre-molded member, the cover 52 defines a plurality of elongate longitudinally extending ribs 56 protruding unitarily outwardly from the interior surface 55 thereof in the region of the corners 54. In this embodiment, cover 52 is applied, as by a shrink-wrap or the like process, to the shaft 26 and positioned thereon in a relationship wherein the ribs 56 thereon overly and fill the recessed edges 50.
By reason of the soft, pliable, deformable and impact-absorbing properties of the material comprising the cover 52, the interior ribs 56 define elongate longitudinal edges on the handle 24 which provide an increased tack and grip friction between the handle and a player's hands while also simultaneously providing cushioned corner or edge regions which reduce the risk of bodily and facial injury and damage to sticks which is normally associated with the use and swinging of lacrosse and hockey sticks during the normal course of play. The present invention as shown in
In the embodiment of
As shown in
Elongate longitudinal ribs 256 are adapted to be snap-fitted into the respective elongate longitudinal slits 254. Each of the ribs 256 includes a generally arcuate dome-shaped head 276, a body 278 depending unitarily downwardly from the bottom of the head 276, and a pair of generally bulbous legs 280 and 282 depending unitarily downwardly from the end of the body 278. The bottom surface of the head 276 additionally defines a pair of shoulders 284 and 286 and each of the legs define a generally convexly shaped end face 288 and opposed flat side faces 290 and 292.
In accordance with the present invention, ribs 256 are snap-fitted into the respective slits 254 as described below in more detail. Although not shown in any of the figures, it is understood that the elongate ribs 256 are initially aligned generally vertically co-planarly above the respective slits 254. Thereafter, the ribs 256 are lowered into contact with the exterior shaft surface 228 and the legs 280 and 282 of the respective ribs 256 are extended through the respective slits 254 and into the respective cavities 274 defined in the interior of the shaft 226.
It is understood of course that, as a result of contact between the arcuate end face 288 of the respective legs 280 and 282 and the exterior shaft surface 228 in the regions of the respective slits 254, the legs 280 and 282 initially are forced and squeezed inwardly against each other into a relationship wherein the side faces 292 of the respective legs are abutted against each other. The legs then spring back away from each other into the position of
Shaft 326 depicted in
Shaft 426 depicted in
Shaft 526 depicted in
In accordance with the present invention, the rib configurations of
Cover 652 is characterized in that it incorporates a plurality of spaced-apart, generally elongate and longitudinally extending raised dome portions, bumps, or ribs 656 which protrude outwardly from the cover exterior and are adapted to overly the respective edges or corners 650 of the polygonally shaped shaft 626. In accordance with the present invention, the interior surface 653 of the cover 652, in the region of the ribs 656 formed thereon, is spaced from the exterior surface 628 of the respective corners or edges 650 of shaft 626 to define a plurality of respective air-filled cushion chambers or cavities 695 surrounding the respective corners or edges 650. Thus, the material comprising the ribs 656 provides for an increased tack and grip friction between the handle 624 and a player's hand while the air in each of the chambers 695 provides and defines an effective cushion which protects players from potential injury from contact with the edges of a stick.
Shaft 726 differs in structure from the earlier described shaft embodiments in that the shaft 726 comprises six exterior face panels 734, 736, 738, 740, 742 and 744 which are of equal width and are separated by a plurality of unitary outwardly projecting or raised elongate, longitudinal ribs 756, 758, 760, 762, 764 and 766 which extend around the peripheral exterior shaft surface 728 in spaced-apart and parallel relationship.
Four of the ribs 756, 758, 760 and 762 are generally oval in shape while the other two ribs 764 and 766 are generally wider than the other four ribs and are generally flat. Ribs 760 and 766 are disposed in a diametrically opposed relationship.
Thus, and as shown in
Cover 752 comprises a plurality of elongate longitudinal strips of material 796 which are positioned, applied and subsequently secured by adhesive or the like into the recesses defined by each of the respective exterior panels. As such, the cover 752 provides impaired cushioned and friction characteristics while simultaneously pressing the outer polygonal geometry of the handle 724. Alternatively, it is understood that the cover 752 may comprise a single layer of material applied to the exterior shaft 728 by any one of the several known methods and processes for securing a second material to the surface of a first material including, for example, the Sticktrusion™ method described earlier with respect to the handle 24 or any one of the other suitable or applicable processes identified above.
The cover 52 surrounds the shaft 26 and may be applied thereto using the Sticktrusion™ process described earlier or any one of the other several methods and processes known in the art and described earlier for applying and securing a second layer of material to a first layer of material.
Thus, and as shown in
Moreover, and in those situations where the respective tapered end portions 58 and 60 are created by stretching of the material comprising the shaft 26, the respective tapered end portions 58 and 60 additionally define regions of the shaft 26 where the material comprising the shaft 26 has a thickness, designated T3, which is less than the thickness, designated T4, of the shaft material in the non-tapered regions of the shaft 26.
In accordance with the present invention, the respective tapered and thinned shaft end portions 58 and 60 create a handle for a lacrosse stick or the like with an improved “whip” or flexing curve in the region of the respective tapered portions for improved shot speed while still preserving the requisite outer polygonal, non-tapered shape and diameter D1 of the exterior of the handle surface. In addition to providing improved “whip” characteristics, the respective tapered end portions 58 and 60 create regions on the handle 24 with increased or improved cushion and friction characteristics by virtue of an increased cover thickness in the region of the respective tapered end portions 58 and 60.
Although not shown in
It will be readily apparent from the foregoing detailed description of the invention and from the illustrations thereof that numerous variations and modifications may be effected without departing from the true spirit and scope of the novel concepts or principles of this invention.
