Abstract: A system and method for variably altering the dynamics of a bowling ball. The system includes a bowling ball, one or more weight holes arranged along the outer perimeter of the bowling ball and extending radially inward therein forming an open cavity therebetween, and one or more removable weight inserts configured to be inserted into and frictionally engage the respective weight holes during an operational use thereof such that the one or more removable weight inserts substantially cover and close the one or more weight holes. Each of the removable weight inserts have a positive or negative weight effect and include indicia designating the weight of the respective removable weight insert.

Abstract: A bowling ball having an asymmetrical weight block with respect to its central axis. 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 intermediate of the two ends. The plane is intersected by the central axis and is enclosed by a boundary defining the largest transverse cross section of the block not normal to the central axis. The medial plane is disposed at an angle of between about 22.5° and 90° with respect to the central axis of the block.

Abstract: A bowling ball having an asymmetrical weight block with respect to its central axis. 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 intermediate of the two ends. The plane is intersected by the central axis and is enclosed by a boundary defining the largest transverse cross section of the block not normal to the central axis. The medial plane is disposed at an angle of between about 22.5° and 90° with respect to the central axis of the block.

Abstract: A bowling ball includes an inner weight block surrounded by the bowling ball shell. The weight block has a body, head and tip portions. The central x axis for the body is offset from the X axis of the ball, while the centered x axes for the head and tip portions are aligned with the X axis of the ball. A ball with such a construction exhibits increased torque which manifests itself as a sharp hook deep into the roll, while the initial trajectory is relatively straight.

Abstract: A bowling ball has a heavy core of given density; the core has an asymmetrical shape that affords no planes of symmetry. The core is encompassed by a spherical shell of lower density; the shell may include two layers, a relatively hard outer layer of an acrylated resin or urethane resin and a more resilient, softer inner layer, usually of urethane or filled polyester resin. A balancing weight, to compensate for finger holes to be drilled into the shell, is preferably an integral part of the bowling ball core. The density of the balancing weight is usually greater than the density of the rest of the core.

Abstract: A bowling ball has an annular band interposed between two spherical segments so as to define an outer peripheral surface of the spherical ball. The first and second spherical segments have respective outer peripheral surfaces formed of a first material having a hook potential, whereas the annular band has an outer peripheral surface formed of a second material having a hook potential different from the hook potential of the first material. In one embodiment the hook potential of the second material is substantially lower than the hook potential of the first material so as to make the ball less sensitive to conditions in the wet portion of the lane and delay significant hooking action until the dry portion so as to improve entry angle and thereby pin count. One way, albeit imperfect, to approximate the hooking potential of a material is to measure its coefficient of friction. A larger coefficient of friction generally leads to a higher hooking potential. A method of using the ball is also disclosed.

Abstract: A spherical gaming device to be held by hand, made out of different materials, having a central core, wherein the central core consists of a removable ball with variable weight and this central core is housed into a first and a second hemispherical hollows, that can mutually fit. The first hemispherical hollow is integral with the spherical gaming device, being at the same time a base of a removable cylindrical portion thereof. The second base of the removable cylindrical portion is a portion of the outside surface of the sphere. The hand-held device also has a pair of drilled holes on the surface of said sphere, that define a first and a second cylindrical hollows to receive the fingers. The removable portion is provided with a trip fastening arrangement.

Abstract: A bowling ball (10) with a weight block assembly including a weight core (28), an annular weight block (22) surrounding the weight core (28) and a top weight block member (23) spaced, at least partly, from the annular weight block (22). In one embodiment (FIGS. 1, 1A) the top weight block (19) extends inwardly toward the center (16) and penetrates the weight core (28). In another embodiment (FIGS. 2 , 2A) the top weight block member (21) is spaced to the side of the annular weight block (20), while in the preferred embodiment, (FIGS. 3, 3A) the top weight block member (23) is aligned with the annular weight block member (22) and is located intermediate the annular weight block member (22) and the spherical surface (14) of the ball (10).

Abstract: A two-piece bowling ball that combines a dynamic core and a urethane cover to thereby permit bowlers to utilize the bowling ball under a variety of bowling lane conditions. The improved bowling ball construction permits the dynamic rotation and revolutions of the ball to produce a true arc toward the pin target.

Abstract: A bowling ball comprises a dense inner core which cannot be penetrated during the drilling of holes for gripping purposes and balance holes to adjust the static weight, a non-spherical outer core formed about the inner core to act as a top weight, and a cover stock. The dense inner core which cannot be penetrated by a drill prevents the characteristics of the bowling ball from being changed and, further, lowers both the moment of inertia and radius or gyration of the bowling ball to improve the bowling ball's characteristics. These characteristics include enhancing the rolling pattern of the ball and increasing the energy with which the ball strikes the pins. The non-spherical outer core operates as a top weight to replace weight removed during the drilling of the finger and thumb holes and enhance the hooking action of the ball by providing a breakpoint which is very sharp at the back end of the bowling lane. That late, sharp breaking hook allows the bowling ball to strike the pins with a greater force.

Abstract: A bowling ball comprises a core surrounded by a cover stock. The core comprises a body with its center positioned substantially coincident with the bowling ball's geometric center and a weight block positioned as close to the outer surface of the bowling ball as possible. The weight block functions as a top weight to offset the mass lost in the bowling ball due to the drilling of gripping holes and balance holes. Furthermore, the weight block provides the three ounce out of balance maximum between the top and bottom of the bowling ball to produce a gyroscopic steering effect which creates a sharp break in the path of the bowling ball at the back end of the bowling lane. The body of the core lowers the moment inertia of the bowling ball to produce a ball with stable rolling characteristics.

Abstract: The lack of uniformity in reaction characteristics of bowling balls of differing weights is avoided by a family of bowling balls having nearly identical reaction characteristics which include a plurality of the balls, each of the same nominal diameter and each differing in weight from the others by about one pound or more. Each ball includes a cover (10) and a core (14, 16, 18, 20) of a material different from the cover (10). Each core (14, 16, 18, 20) is constructed and arranged within its cover to produce a first radius of gyration about a first axis and a second, different radius of gyration about a second axis that is generally transverse to the first axis. The first radius of gyration of all of the balls is substantially identical and the second radius of gyration of all of the balls is substantially identical.

Abstract: A bowling ball having thumb and finger holes for gripping said ball, said ball having a geometric center and when thrown consistently having a ball track plane and a spin axis, said spin axis being perpendicular to said ball track plane, said ball comprising:a first weighting means located within said ball along said spin axis on a positive side of said ball, said first weighting means having a weight of W.sub.1 and being located a distance D.sub.1 from said geometric center; and, a second weighting means located within said ball along said spin axis, said second weighting means having a weight W.sub.2 and being located a distance D.sub.2 from said geometric center, W.sub.1 being greater than W.sub.2, D.sub.1 being less than D.sub.2, said first and second weighting means being on opposite sides of said geometric center along said spin axis, said first and second weighting means placed along said spin axis so that W.sub.1 D.sub.1 =W.sub.2 D.sub.2.

Abstract: A two-piece bowling ball includes a non-symmetrical weight block or core to provide improved and increased rotation inertia. The block consists of head, body and tip portions. The block is asymmetric in plan, the asymmetry being the result of truncation of a plan-symmetric form of the block by a plane extending through the block at an angle of less than 90 degrees to the vertical, removing less than 50% of the plan-symmetric block mass. The untruncated form of the head is a spherical segment of one base having its spherical surface concentric with the surface of the ball. The non-truncated body is in the form of a cylinder or parallelepiped, while the tip in its untruncated form is of a shape having a maximum diameter no greater than that of the body whose diameter is no greater than that of the head. The tip is further chosen such that overall top eccentricity after truncation does not exceed three ounces in accordance with ABC guidelines.

Abstract: A positive weighted balanced bowling ball is disclosed which comprises a spherical member which, for reference purposes, has a positive half and a negative half. A center weight in the shape of a segment of a sphere is located in the negative half of the member and a side weight in the shape of a segment of a sphere resides in the positive half of the spherical member. A top weight resides partially in the positive half and partially in the negative half of the member and the ball is provided with finger and thumb holes for gripping and manipulating the bowling ball. The center weight is of larger mass than the side weight and is located relatively close to the center of the ball whereas the side weight is located in a portion of the positive half relatively further from the center and near the exterior of the spherical member. The center weight and side weight are balanced when the bowling ball is at rest, and their centers of gravity and radii are considered.

Abstract: A bowling ball wherein the weights of the inner core and the encapsulating mass are varied through the use of materials of preselected densities, for the purpose of manufacturing balls having a low moment of inertia. The instant invention accomplishes this by featuring an inner core having a minimum specific gravity of 0.1063 per pound of ball weight, and a construction wherein the volume ratio of the inner core to that of the encapsulating mass, in conjunction with the specific gravity ratio of the inner core to that of the encapsulating mass, yields a .[.maximum.]. .Iadd.low .Iaddend.moment of inertia .[.(about the ball's vertical axis) of 0.318 in-ozs-sec.sup.2 per pound of ball weight.].. As the moment of inertia of a fixed weight ball is decreased, the translational kinetic energy increases and the rotational kinetic energy decreases.

Abstract: A bowling ball having an elongated weight member integrally incorporated therein for enhancing the ball's inherent, angular momentum as it travels down a lane. The weight member has a longitudinal axis with a maximum cross-section at an intermediate axial position, and an inward, uniform taper extending from this intermediate axial position towards opposite, terminal ends. When the ball is released with the axis of the weight member in a predetermined orientation with respect to the bowler's track, as determined by the position of the grip hole(s) relative to the weight block, pin action is enhanced thereby producing consistently higher scores.