Abstract: A ball bat includes a first bat portion (such as a barrel portion) and a second bat portion (such as a handle). The portions may be spaced apart along the bat's longitudinal axis. A joint connects the first and second bat portions. The joint may be positioned at or near, or centered about, a location of maximum vibration, such as an antinode of the bat. The joint may include a filler material (such as an elastomeric material) at least partially surrounding a rod element. The filler material and the rod element may span a gap between the first and second bat portions. The filler material and the rod element may extend into the first bat portion or the second bat portion. A cover material may be positioned around the filler material. The joint may form a structural link between the bat portions and it may be configured to absorb vibration.

Abstract: The invention concerns an arrangement and a method for configuring equipment for personal performance monitoring comprising at least one carrier item having a mounting zone for receiving a communication module, one or more sensors and/or actuators and a first processing unit functionally connected to said mounting zone and said sensors and/or actuators. The first processing unit is configured to process sensor signals from the sensors and/or actuators and to communicate with a communication module that is mounted on the mounting zone of the carrier item and having a second processing unit configured to further process said sensor/actuator signals and to communicate processed signals to a remote device over a wireless communication protocol. A remote device is adapted to provide a predefined code to configure the equipment to process sensor or actuator signals according to a use of said carrier item as identified by said predefined code.

Abstract: A softball or baseball bat is provided. The bat can comprise a handle that has a proximate end and a distal end and a barrel that has a hollow portion. The bat can comprise first damping section that comprises a first material, and the first damping section can be at least partially interposed between a portion of the handle and a portion of an inner wall of the barrel. The bat can comprise a second damping section that can comprise a second material, and the second damping section can be at least partially interposed between a portion of the handle and a portion of the inner wall of the barrel. At least a portion of the first damping section or the second damping section can prevent the handle from directly contacting the barrel when the bat is at rest.

Abstract: A method of making a ball bat may include forming a bat frame with a handle and an inner barrel structure, providing spacer elements extending radially outwardly from the inner barrel structure, and forming a barrel shell having a main barrel and a tapered section. An inner diameter in the tapered section may be equal to an outer diameter of a first one of the spacer elements. The method may include mechanically locking the barrel shell to the bat frame by passing the handle through the barrel shell and moving the barrel shell toward the inner barrel structure until the barrel shell contacts the first one of the spacer elements. A gap is maintained between an outer diameter of the inner barrel structure and the barrel shell. The barrel shell may deflect during a hit to create a trampoline effect, while the inner barrel structure limits the deflection.

Abstract: A softball or baseball bat with modified restitution characteristic is provided. The bat can comprise a substantially rigid core coupled with a single or multi-piece sleeve. The core can comprise a tip end, a barrel taper, a handle taper, and a handle. The sleeve can slide over the handle portion and can be pressed, molded, or adhered to the barrel taper. The resilient sleeve can be sized and shaped such that the sleeve portion is substantially the same diameter as the tip end. The sleeve can comprise a material capable of impact absorption. The sleeve can have a composite structure with inner and outer sleeve components. The sleeve can further comprise a cone to taper the sleeve in the handle taper portion of the bat. The material and thickness of the sleeve and the core can be varied to meet applicable restitution requirements.

Abstract: A tactile reference attachment for releasable attachment to a sports equipment handle providing a user with tactile biofeedback. The attachment includes a tactile reference feature that extends longitudinally along an exterior body surface and is formed with dimensions specifically tailored to harness the user's natural attributes of sensibility, proprioception, and neuromuscular memory to improve a user's accuracy. The tactile reference attachment includes a flexible primary substrate having a plurality of attachment perimeter edges, an exterior surface, an interior surface having an adhesive, a thickness, and at least a first tactile reference projection having a plurality of perimeter edges, a projection width of no greater than 5.0 millimeters, a projection height of at least 0.5 millimeters, and an indentation length.

Abstract: A head for a ball striking device, such as a golf club head, includes a face member having a face with a striking surface configured for striking a ball and a rear surface opposite the striking surface, a weight member connected to the face member behind the rear surface of the face member, and a resilient member positioned between the weight member and the face member. The resilient member is connected to the rear surface of the face member to connect the weight member to the face member. The resilient member is compressible to permit energy and/or momentum to be transferred between the weight member and the face member through the resilient member during impact, including an off-center impact on the striking surface. Momentum transferred from the weight member to the face member during an off-center impact may reduce energy loss and twisting of the face on impact.

Abstract: A head for a ball striking device, such as a golf club head, includes a face member having a face with a striking surface configured for striking a ball and a rear surface opposite the striking surface, a weight member connected to the face member behind the rear surface of the face member, and a resilient member positioned between the weight member and the face member. The resilient member is connected to the rear surface of the face member to connect the weight member to the face member. The resilient member is compressible to permit energy and/or momentum to be transferred between the weight member and the face member through the resilient member during impact, including an off-center impact on the striking surface. Momentum transferred from the weight member to the face member during an off-center impact may reduce energy loss and twisting of the face on impact.

Abstract: Golf club heads include a golf club head body, a ball striking face, and a shaft engaging member configured to engage a golf club shaft with the golf club head body. Additionally, the shaft engaging member may be configured to engage the golf club head body and the shaft below a center of gravity of the golf club head, and/or the shaft engaging member may have rotational locking structure that can be locked in a plurality of positions. Further, the golf club head may include a face member and a rear member, where the rear member is configured to transfer energy and/or momentum to the face member, particularly on off-center hits.

Abstract: Golf club heads include a face member with a face having a striking surface and a rear side opposite the striking surface, where a rear cavity is defined on the rear side of the face member, and a rear member is connected to the rear side of the face member, such that the rear member is at least partially received within the rear cavity. A resilient material is positioned between the rear member and the face member, and the head also includes an engagement member rigidly engaging the face member and the rear member at a point between the heel edge and the toe edge of the rear member. The engagement member has a rigidity greater than that of the resilient material and may form a sole area of rigid engagement between the face member and the rear member.

Abstract: A ball bat extending about a longitudinal axis. The bat includes a handle portion, a barrel portion and an injection molded element non-removably attached to the handle member. The barrel portion has a proximal region and a distal region spaced apart by a central region. The element has a tapered proximal region and barrel engaging region. The barrel engaging region of the element non-removably engages the proximal region of the barrel portion. The bat has a total length measured from a proximal end of the handle portion to a distal end of the barrel portion. The handle portion has a length that is less than 70 percent of the total length.

Abstract: A ball bat extending about a longitudinal axis and includes a handle portion, a barrel portion, an injection molded element, and a tubular insert. The handle portion has a generally uniform outer diameter. The barrel portion has proximal and distal regions spaced apart by a central region. The element includes a tubular inner wall defining a longitudinal bore. The element is non-removably attached to the handle member. The element includes a tapered proximal region, a barrel engaging region, and an insert engaging region for engaging the insert. The insert engaging region includes a stop for inhibiting longitudinal movement of the insert. The barrel engaging region non-removably engages the proximal region. The bat having a total length measured from a proximal end of the handle portion to a distal end of the barrel portion. The handle portion has a length that is less than 70 percent of the total length.

Abstract: A tubular bat is provided whereby at least one diaphragm is located within the internal cavity of the bat. The diaphragm is fastened at its peripheral edge to the inner surface of the bat wall, thereby dividing the internal cavity into two separated cavities, thus creating two sweet spots, or shifting the existing sweet spot forward towards the distal end of the bat. This improves player performance by providing an expanded number of optimal hitting zones or by moving the optimal hitting zone farther from the bat handle.

Abstract: A ball bat includes a handle portion having a generally uniform outer diameter with respect to a longitudinal axis, a barrel portion and an element coupled to the handle member. The barrel portion has a proximal and distal regions spaced apart by a central region. The element has a tapered proximal region and barrel engaging region. The element has a tubular wall defining a bore for receiving the handle member, and an outer wall extending over a portion of its length. The outer wall is spaced apart from the tubular wall by at least one rib. The barrel engaging region non-removably engages the proximal region of the barrel portion. The bat has a total length measured from a proximal end of the handle portion to a distal end of the barrel portion. The handle portion has a length that is less than 70 percent of the total length.

Abstract: A multi-section ball bat includes a barrel, a handle and an end cap. The handle has a first end defining a grip portion and a generally opposite second end attached to the barrel. The end cap has a first end attached to an opposite end of the barrel. At least a portion of the handle may have a multi-wall configuration defined by a gap. Similarly, at least a portion of the end cap may have a multi-wall configuration defined by a gap. The gap in a wall of the handle or the end cap may be formed between layers of a multi-layer composite material forming the handle or end cap. The presence of the gap in the handle or end cap extends the sweet spot of the bat from the barrel into the handle and/or the end cap.

Abstract: A ball bat extending along an axis configured for hitting a ball. The bat including a handle portion, a barrel portion coupled to the handle portion, a tubular sleeve positioned within the barrel portion, and an end cap. The barrel portion includes proximal and distal end regions, and a central region. The end cap is coupled to the sleeve and to the barrel portion by an adhesive. The end cap includes an end wall and an annular wall proximally extending from an inner surface of the end wall. The annular wall is configured to engage an inner surface of a distal end region of the sleeve. The annular wall defines at least one through-wall opening configured for facilitating flow of the adhesive through and about the annular wall during the coupling of the end cap to the barrel portion.

Abstract: The invention relates to a piece of sports equipment which is subject to a shock-like load. In a piece of sports equipment in accordance with the invention, an elongated support element is present which is at least regionally inwardly hollow. It can, for example, be an at least almost complete baseball bat or also only a part region at which a handle of a piece of sports equipment is present. At least one hollow space in which metallic and/or ceramic hollow bodies are present is present in the support element. In the piece of sports equipment, the support element can form the outer skin or at least a part thereof.

Abstract: A vibration isolation system for hand implements including sporting equipment and tools to substantially reduce impact forces from being delivered to the user's hands. Isolation elements provide low spring rates enabling the system to isolate bending vibration, recoil, and twist. An outer shell member substantially encircles the grip end of the hand implement and is spaced outwardly thereto allowing the grip end to freely deflect within the outer shell member.

Abstract: The racket includes a handle (2) and a frame (4) defined by an inner frame (40) and an outer frame (42), said frame further including shock-absorbing means (50) positioned between the peripheral outer surface of the inner frame and the peripheral inner surface of the outer frame. The frame further includes at least one fitting member (60) having an elongate body (62) and extending against the outer surface of the outer frame (42), and at least one tube (66) for passing a string yarn (10, 12), extending both in first openings (40?) formed in the inner frame and in second openings (42?) formed in the outer frame.

Abstract: A shock and vibration attenuating device is inserted into or attached to the stroke portion of sports equipment and provided with a chamber carrier and mass particles dispersed in one or more chambers formed into the chamber carrier. The inner surface of the chambers and the mass particles are coated with an electrically conductive material layer to prevent the particles from clinging together or clinging to the inner surface of the chambers, so that the particles are able to move freely within the chambers to attenuate the shock and vibrations of the sports equipment caused by reacting-force during stroke.

Abstract: A head for a ball striking device includes a bracing member connected to an upper sole surface located on the sole of the body opposite the bottom sole surface. The bracing member includes a first end connected to a first point on the upper sole surface, a second end connected to a second point on the upper sole surface spaced from the first point, and a bridge portion extending between the first and second ends. The bridge portion extends upward from the upper sole surface and is spaced from the upper sole surface. The bridge portion may be formed by one or more trusses, and may define a generally triangular shape in one embodiment. The first and second ends may be connected to the upper sole surface using a variety of techniques, e.g., welding or other integral joining technique, integral forming, adhesive or other bonding material, or other technique.

Abstract: A hollow non-wood baseball or softball bat wherein the impact portion of the bat contains an inner barrel that is positioned by means of a (i) foam insert, (ii) tube extending from the bat's knob, or (iii) line attached to the bat's knob and end cap and extending throughout the bat such that the inner barrel does not come into contact with the inside wall of the bat when the bat is at rest yet when swung the inner barrel is allowed to move so as to amplify the rebound effect given to the ball upon impact with the bat.

Abstract: The present invention provides a sports implement whose characteristics a user can adjust freely and minutely. According to the present invention, it is realized that a light-weight high functional circuit is installed in various sports implements by constituting various functional circuits with a TFT formed on a film, without using a printed board. A high functional circuit using a TFT formed over a flexible plastic film is light-weight and strong in bending and impacts. It is possible to provide a sports implement that is favorable in operationality and friendly to many users in a wide range regardless of the muscle strength or physical constitution and the like of a user, since the user can adjust characteristics of a sports implement.

Abstract: A protective strip device to apply to the shaft of a hockey stick, the strip device having an inner side face, adhesive on the inner side face for bonding to the shaft of the stick, an outer facing side defining a central groove, and two spaced apart shock absorbing side abutment ridges extending lengthwise along opposite sides of the central groove, and a plurality of spaced apart openings formed along the central groove.

Abstract: The invention relates to a piece of sports equipment which is subject to a shock-like load. In a piece of sports equipment in accordance with the invention, an elongated support element is present which is at least regionally inwardly hollow. It can, for example, be an at least almost complete baseball bat or also only a part region at which a handle of a piece of sports equipment is present. At least one hollow space in which metallic and/or ceramic hollow bodies are present is present in the support element. In the piece of sports equipment, the support element can form the outer skin or at least a part thereof.

Abstract: A hollow metal bat comprising an elongated tubular structure having a barrel portion, a handle portion and a tapered portion connecting the barrel portion to the handle portion, and further comprising at least one helical internal rib formed along at least a portion of the elongated tubular structure.

Abstract: The present invention relates to a ball bat with improved shock and vibration dampening. More particularly, the present invention relates to a ball bat with a handle, a barrel, and a socket assembly interposed between the handle and barrel. The socket assembly allows the barrel and handle to move relative to each other, which dampens shock and vibration.

Abstract: A tubular bat having a barrel of thin walls is stiffened by rings to adjust and tune performance. The walls of a bat is thinned to reduce weight and to enhance a batters control. However, regulatory bodies dictate performance standards that may require stiffer walls. Additionally different regulatory bodies dictate different standards. Therefore in order to meet regulatory standards in various jurisdictions, the walls of the bat barrel may be stiffened using rings to adjust and tune performance while minimizing the weight of the bat. The design, size and material from which the ring is made may vary. The placement of the ring may be used to tune specific performance profile of a bat.

Abstract: During use of a golf club, the impact of the head of the club with a ball causes complex vibrations in the handle that are uncomfortable for the user and may adversely affect the force applied to and energy transferred to the ball. The invention aims to mitigate this problem by providing an end piece attached to an end of a shaft of the golf club thereby defining a tapered termination for an air column defined by said shaft.

Abstract: Provided is a shaped body for production of sports equipment such as tennis, squash, and badminton rackets, golf clubs, hockey and ice hockey sticks and baseball bats. The shaped body includes a core of two tubular resonant bodies, running parallel to and spaced at a distance from each other and surrounded by a common covering. A spacer body with convexly curved opposed ends is arranged between the resonant bodies, whereby the mass of the resonant bodies is greater than that of the spacer body. The vibrations of the two vibrating systems, in the form of the resonance bodies, are overlaid in an advantageous manner, by means of the coupling of the resonance bodies. The invention further relates to a method for the production of the shaped body and the use of the shaped body in sports equipment.

Abstract: Ball bats comprising a stem and a handle surrounding the stem. An elastomeric decoupler system installed in the handle sharply reduces the transmission of shocks and vibrations from the stem to the handle, mitigating stinging and other unpleasant sensations experienced by the batter when a ball is struck. Unpleasant sensations can be further reduced by installing a DTMS damping device in the knob of the bat and by installing an elastomeric grip on the handle of the bat; and the unpleasant sound made when a bat strikes the ground or the like can be materially reduced by a device attached to the stem of the bat intermediate the ends of the handle. The present inventions are particularly adaptable to hollow, metal bats; and provision is made for venting the knob of the bat when it is welded in place so hot gases will not be forced into, and reduce the integrity of, the weld. Appropriate ones of the devices described above may also advantageously be employed in wood, composite, and other bats.

Abstract: Ball bats comprising a stem and a handle surrounding the stem. An elastomeric decoupler system installed in the handle sharply reduces the transmission of shocks and vibrations from the stem to the handle, mitigating stinging and other unpleasant sensations experienced by the batter when a ball is struck. Unpleasant sensations can be further reduced by installing a DTMS damping device in the knob of the bat and by installing an elastomeric grip on the handle of the bat; and the unpleasant sound made when a bat strikes the ground or the like can be materially reduced by a device attached to the stem of the bat intermediate the ends of the handle. The present inventions are particularly adaptable to hollow, metal bats; and provision is made for venting the knob of the bat when it is welded in place so hot gases will not be forced into, and reduce the integrity of, the weld. Appropriate ones of the devices described above may also advantageously be employed in wood, composite, and other bats.

Abstract: Industry regulatory organizations have created performance restrictions for ball bats. The present invention relates to a ball bat with an internal impact dampening means. More particularly, the present invention relates to a ball bat with a handle, a barrel, and a central tube positioned coaxially within the barrel. The central tube includes at least one restriction member capable of limiting the deformation experienced by the ball bat upon impact of a ball. Precisely limiting the deformation of the ball bat allows the present invention to achieve, but not exceed, performance substantially equal to the maximum performance allowed by industry regulatory organizations and maintain that level of performance over a substantial length of the ball bat.

Abstract: A bat is provided including a handle portion, a barrel portion and a core member. The barrel portion has an interior cavity with an interior surface. The core member is disposed in the interior cavity of the barrel portion. The core member has an exterior surface engaged with the interior surface of the barrel portion. The handle portion extends into the interior cavity of the barrel portion and is coupled to the core member. The coupling of the core member to the handle allows the impact of the barrel portion on a ball to be transmitted to the user through the core member and the handle portion. The bat may thereby provide the user with an increased sense of the quality of the contact with the ball.

Abstract: The present invention relates to a ball bat with improved shock and vibration dampening. More particularly, the present invention relates to a ball bat with a handle, a barrel, and a socket assembly interposed between the handle and barrel. The socket assembly allows the barrel and handle to move relative to each other, which dampens shock and vibration.

Abstract: A composite baseball bat includes a handle, which has a tapered portion formed on one end of the handle body thereof and gradually increased in diameter in direction away from the handle body, a spacer member formed of a soft material having a uniformly distributed predetermined thickness and covered on the periphery of the tapered portion of the handle, and a barrel, which is sleeved onto the handle, having a first opening ad a second opening respectively located on two distal ends thereof for the passing of the handle body of the handle and a tapered portion located on one end around the first opening and pressed on the spacer member against the tapered portion of the handle.

Abstract: A bat has a barrel with a multi-wall construction. The handle can be formed integrally with the inner wall. A damping device can be installed between the handle and the outer wall of the barrel. The damping device can dampen vibrations transmitted from the outer wall to the handle. The damping device can also separate the outer wall from the inner wall adjacent the handle section. The inner and outer walls can be bonded together adjacent the end of the bat. Alternatively, the inner and outer walls can be entirely free of bonding to one another. Additionally, a damping device can separate the outer wall from the inner wall adjacent the end of the bat. Furthermore, the bat can include a pair of damping devices that separate the inner wall from the outer wall both adjacent the handle section and at the end of the bat.

Abstract: A vibration isolation system for hand implements including sporting equipment and tools to substantially reduce impact forces from being delivered to the user's hands. Isolation elements provide low spring rates enabling the system to isolate bending vibration, recoil, and twist. An outer shell member substantially encircles the grip end of the hand implement and is spaced outwardly thereto allowing the grip end to freely deflect within the outer shell member.

Abstract: A bat has a barrel with a multi-wall construction. The handle can be formed integrally with the inner wall. A damping device can be installed between the handle and the outer wall of the barrel. The damping device can dampen vibrations transmitted from the outer wall to the handle. The damping device can also separate the outer wall from the inner wall adjacent the handle section. The inner and outer walls can be bonded together adjacent the end of the bat. Alternatively, the inner and outer walls can be entirely free of bonding to one another. Additionally, a damping device can separate the outer wall from the inner wall adjacent the end of the bat. Furthermore, the bat can include a pair of damping devices that separate the inner wall from the outer wall both adjacent the handle section and at the end of the bat.

Abstract: A multi-piece ball bat includes a first section including a hitting portion, and a second section including a handle portion. A flexible joint connects the first section to the second section. The flexible joint may be a structural joint, such as a spring member, a mechanical locking joint, or a pneumatic or hydraulic joint, or it may be a non-uniform and/or non-continuous elastomeric joint.

Abstract: A shaft of a cue stick for billiards or pool, includes an elongated tapered body laminated of a plurality of wood strips, each of the wood strips in cross-section having a sector section with an arcuate outer surface and an arc inner notch such that when the wood strips are laminated together, the arcuate outer surfaces form an outer surface of the body and the inner notches define an axial hole through the body; and a circular core tube made of a material having a greater rigidity than wood and having a shorter length than the axial hole, the tube being firmly received in the axial hole in such a way that the cue sticks body has a front hollow section extending a predetermined length along its axis from larger diameter to the smaller diameter end.

Abstract: A ball bat includes one or more focused flexure regions located predominantly or entirely in the transition section between the barrel and the handle of the ball bat. One or more of the focused flexure regions may additionally or alternatively be located partially or entirely in the barrel and/or the handle of the ball bat. The one or more focused flexure regions each include a radially inner structural region and a radially outer dampening region for reducing the local axial stiffness, and improving the flexure, of the ball bat at the location of the focused flexure region.

Abstract: A sports bat, such as a baseball or softball bat, is electro-deposited with a nanostructured metal. Bats made from aluminum alloys or other metals may be electro-deposited with varying thicknesses of nanostructured metals such as nickel, nickel iron, cobalt phosphorous, or similar materials. The bat substrate alloy can be any metal or alloy. The coating may be done using an electro-deposition process.

Abstract: A bat has an elongate tubular striking member of a first material, and an elongate handle member of a second material. The handle may be of composite material laid up in selected layers and orientation to produce selected weight distribution, strength, and stiffness and improved batting capabilities. The striking member and handle member may have juncture sections which are substantially rigidly interconnected through mating configurations.

Abstract: A sporting good item or other product includes a “shrink-label” formed from a shrink-sleeve, shrink-wrap, or a stretch-sleeve adhered to or otherwise affixed to an outer surface of the item. The shrink-label includes pre-printed graphics and closely conforms to the item's outer surface, including any contours or tapered regions, so that the graphics may be displayed anywhere on the item. The shrink-label may optionally be applied to the item via an automated device. A clear coat or other protective layer may optionally be applied to an outer surface of the shrink-label to increase its durability and resistance to abrasion, which is particularly beneficial when the shrink-label is applied to an item intended for impact applications, such as a ball bat.

Abstract: A vibration damping baseball bat includes a barrel portion and a handle portion. The barrel portion and the handle portion are interconnected in an aligned and spaced-apart relation. The mechanism by which the barrel and handle portions are interconnected dampens vibrations created when a ball contacts the bat and provides limited pivotal movement of the barrel portion relative to the handle portion.

Abstract: An impact instrument for delivering an impulse to an object. The impact instrument may include an impact surface for contacting the object and an elongated member extending from the impact surface that terminates in an end. The elongated member may include a grasping region in the vicinity of the end. When the instrument is grasped within the grasping region, the center of percussion of the instrument preferably coincides with the impact surface. The instrument may also contain pivoting grasping member disposed on the elongated member. A cavity is preferably formed between the grasping member and the elongated member and may contain compressible material. The grasping member may rigidly contact the elongated member at an ideal pivot point. The grasping member is preferably adapted to pivot with respect to the elongated member at the ideal pivot point.

Abstract: The present invention relates to a racket, in particular a tennis racket or squash racket having a particularly suitable dampening behavior. For this purpose, the ball game racket of the present invention comprises a racket head, a heart region and a handle portion which together form a frame, wherein in the region of the handle portion and/or in the region of the transition between handle portion and heart region a dampening means consisting of a front and/or a rear dampening element is arranged.

Abstract: A tubular baseball bat comprising a substantially full length core shaft of preferably constant cross-section, including a handle portion, and a barrel with a gap or separation between the core shaft and barrel, the core shaft and barrel being connected at two or more locations. Embodiments include bats with long barrels without taper sections, bats with taper sections integral with the barrels, bats with separate taper sections which may be of non-circular cross-section, bats with flexible circumferential connecting structures, bats with folded barrel end portions, and bats with resilient means between the core shaft and barrel. Such bats can have larger hitting areas, larger sweetspots, higher performance, and provide minimal sting to a player's hands.

Abstract: A high specific-gravity EPDM composition consisting of a mixture of EPDM containing diene at less than 4.5 wt % and ethylene at not less than 58 wt % nor more than 80 wt % and having a Mooney viscosity ML1+4 not less than 50 nor more than 170 at 125° C. and a powdery material, containing powder whose specific gravity is not less than 12 as a main component thereof, added to the EPDM at not less than 80 wt % nor more than 97.5 wt % of a whole amount of the high specific-gravity EPDM composition.