BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1A shows a first embodiment having an inset for making a handle in a bowling ball, with a handle formed in the inset by a cavity in the inset, wherein the cavity has the general shape of the side view of a person's hand with fingers closed toward the person's palm.
FIG. 1B shows the inset having a cavity with a shape similar to that of the side of a person's hand with fingers closed toward the person's palm.
FIG. 1C illustrates a variant, wherein the inset of FIG. 1B may be replaced in a bowling ball with the inset of FIG. 1C.
FIG. 2A shows a variation of the first embodiment wherein the inset is made with a single thread.
FIG. 2B shows a second embodiment, the embodiment comprising an inset made in a bowling ball, wherein the cavity accepting the inset is made to accommodate a person's—the cavity having the shape shown in FIG. 1B, wherein the inset is configured with traditional holes to accept a person's fingers.
FIG. 2C shows a bowling ball with a cavity made within, the cavity configured to accept a bowler's hand. The cavity may be filled with an inset that may have a traditional bowling grip.
DETAILED DESCRIPTION
A First Embodiment
FIG. 1A shows a preferred embodiment 1000, wherein a handle is formed in the bowling ball 1100 by an inset 1400. Material is removed from the bowling ball 1100 by use of a router or similar tool, to form a hole 1200 in the bowling ball 1000, the hole 1200 having dimensions necessary to accommodate the inset 1400. Preferably, the hole is made with threads 1250 so that the inset 1400, also having threads 1410, may be screwed into the hole 1200. The inset 1400 is made with indents 1430 for engaging a spanner wrench, by which the inset is turned. Optionally, the hole may be made without threads so the inset 1300 is inserted into the hole 1200 and glued or retained by other means.
With reference to FIG. 1B, the inset 1400 is shown, having a single cavity 1350, the cavity 1350 having an entrance 1352 and a termination 1354. The finger's of a bowler's hand are inserted into the entrance 1352 of the cavity 1350, and are cupped inside the cavity 1350, with ends of the person's fingers being received by the termination 1354 of the cavity 1350.
With reference to FIG. 1A, as the ball 1100 rolls, any point on the surface may contact the surface of the bowling alley, including the portion of the ball where the bowler's fingers enter the cavity 1352 forming the handle. Since that portion of the ball's handle is formed without material, when a point in proximity of the handle 1352 contacts the surface of the alley, the ball will drop slightly. However since the ball at the point of contact deviates only slightly from a perfect spheroid, the deviation from a perfect spheroid is very slight so that the rolling characteristics of the ball will be minimally impacted—no more than the affect on the ball from the finger holes in the ball.
When the inset has been inserted into the bowling ball, the inset has been made so the rotational moment of inertia of the ball is uniform, with minimal deviation from that of a standard bowling ball without the inset. The method of varying the material properties are selected from a set of methods comprising: (1) varying the density of the composite material from which the ball is formed, or (2) adding weights to compensate for material that is removed to form the handle to accept the inset.
With reference to FIG. 1C, the invention may also comprise a second inset 1300, the second inset used to replace the inset shown in FIG. 1A or FIG. 1B.
A Variant of the First Embodiment
With reference to FIG. 2A, the inset 2400 has a single truncated thread 2450 rather than a plurality of threads as shown in FIG. 1A. In this variant the inset 1400 has a spring 2470, which rests under the inset 2400, and against the bottom of the hole 2200 made in the ball, therefore the spring 2470 exerts an upward pressure against the inset 2400. To install the inset 2400, the inset is pressed down into the ball with the spring 2470 beneath. The inset 2400 is turned with a spanner wrench engaging indents 2430 in the inset 2400. The inset is pressed down until the single thread 2450 is below the truncated thread 2250 in the hole 2200. The inset is turned so that the thread in the inset 2450 rides beneath the thread 2250 in the hole. The pressure exerted by the spring 2470 keeps the inset locked in place.
A Second Embodiment
With reference to FIG. 2B, the inset 2400 has a single truncated thread 2440 rather than a plurality of threads as shown in FIG. 1A. In this variant the inset 2400 has a spring 2470, which rests under the inset 2400, and against the bottom of the hole 2200 made in the ball, therefore the spring 2470 exerts an upward pressure against the inset 2400. To install the inset 2400, the inset is pressed down into the ball with the spring 2470 beneath. The inset 2400 is turned with a spanner wrench engaging indents 2430 in the inset 2400. The inset is pressed down until the single thread 2450 is below the truncated thread 2250 in the hole 2200. The inset is turned so that the thread in the inset 2450 rides beneath the thread 2250 in the hole. The pressure exerted by the spring 2470 keeps the inset locked in place.
Again, with reference to FIG. 2B, the inset 2400 is made having traditional finger-holes 2450. The cavity 2200 made in the bowling ball 2100 is made in the shape shown in FIG. 2C. Therefore, if a traditional bowling grip is used, the inset shown in FIG. 2B is inserted. If a hand grip is used, the inset in FIG. 2B is removed.
DISCLOSURE SUMMARY
The foregoing description of two embodiments of the invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed. Obvious modifications or variation are possible in the light of the above teachings. Modification to the size and dimensional relations of parts of the invention can obviously be made in response to varying hand sizes and age of bowlers. All such modifications and variations are within the scope of the invention as determined by the following claims when interpreted in accordance with the breadth to which they are fairly, legally and equitably entitled.
Patent Application
20080039221
