Patent Application
20090023508
The present invention relates to bowling balls, and more particularly to bowling balls incorporating an internal weight block of novel configuration for effecting ball performance in a positive manner.
Weight blocks of various sizes and shapes have been incorporated in bowling balls in order to alter the performance of the ball as it travels down the alley and impacts the pins. Such blocks are disclosed, for example, in U.S. Pat. No. 5,238,245 and its Reissue (Re. 35,448), of the present applicant, as well as U.S. Pat. Nos. 5,037,096, 5,389,042, and 6,027,412 all of Pine et al. The weight blocks may be of essentially symmetrical form and incorporated in the ball with the geometric center of the ball and the weight block coincident, or with the weight block and/or its position within the ball symmetrical.
The weight block of the present invention is asymmetrical with respect to a central axis. That is, the weight block has a pair of ends through which the central axis of the block extends, and a medial portion which is offset or skewed with respect to the weight block axis. The block has an outer surface which has a maximum cross section in at least one plane intersected by the central axis which is intermediate of the two ends. This plane, i.e., the plane intersected by the central axis which is enclosed by a peripheral boundary defining the largest transverse cross section of the block is preferably in a flat plane which is not normal to the central axis. Rather, the medial plane is disposed at an angle, preferably of about 22.5° but in any case other than 90°, with respect to the central axis of the block. The plane of largest cross section is preferably about midway between the two ends of the weight block. The asymmetry of the weight block produces a spin and roll of the ball wherein it is incorporated which ultimately results in greater pin action and thus higher scores. The object of the invention is to provide a bowling ball incorporating a novel and improved weight block which improves the bowlers opportunities of achieving improved scores. Other objects will in part be obvious and will in part appear hereinafter.
The foregoing and other features of construction and operation of the invention will be more readily understood and fully appreciated from the following detailed description, taken in conjunction with the accompanying drawings.
In
Weight block 12 is seen to have two ends 18 and 20 with a central axis A-A extending through both ends. In the illustrated embodiment, the outer surface of block 12 is formed of a plurality of adjacent, flat segments 22 which taper outwardly from both of ends 18 and 20 to meet at an intermediate plane defined by peripheral boundary 24. As is particularly evident in
The asymmetry of the weight block, and thus the center of mass of the ball, gives the ball a certain degree of instability as it travels down the lane. This creates ball travel characteristics known in the art as wobble, lope and flip which an experienced bowler may employ to improve the pin action, ultimately providing an opportunity to improve overall score.
