Abstract:
Disclosed is a tubular elastomeric grip with raised or embossed geometric designs arrayed around its circumference with an axial cut along its length adapted to be removably attached to a cylindrical bar such as those used while participating in fitness activities associated with the gripping of a bar or handle.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application claims the benefit of U.S. Provisional Application Ser. No. 62/044,456 filed Sep. 2, 2014, the entire contents of which are hereby incorporated by reference. 
     
    
     BACKGROUND 
       [0002]    This disclosure relates to a molded article for use on physical fitness machinery and equipment. 
       SUMMARY 
       [0003]    The grip is used while participating in fitness activities associated with the gripping of a bar or handle. These activities may include, but not limited to, barbell lifts and presses, various gymnastic movements such as pull ups, bar hangs, kettle bell swings, sled pushing and pulling. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0004]      FIG. 1  is a perspective view of the grip of the invention. 
           [0005]      FIG. 2  is a view of the grips installed on an exercise bar. 
       
    
    
     DETAILED DESCRIPTION 
       [0006]    The item is a molded article for use on physical fitness machinery and equipment. 
         [0007]    They may also be used in a similar capacity as grips for bicycles, motorcycles, scooters which may require gripping a bar. 
         [0008]    Functional uses in occupational therapy for patients requiring grip assistance in everyday activities. 
         [0009]    The product is unique in its design in that it is functional to a number of applications. The design allows it to be quickly portable while at the same time displaying features of a more permanent grip. 
         [0010]    The attached drawings provide details of the design and one of the intended uses and their means of attachment. 
         [0011]    Channels are designed within the grip to allow straps for securing to grips to the bar. 
         [0012]    The following refers to  FIG. 1 . The product itself is designed to be used as a grip  10  and would be slightly longer than the width of a hand. These lengths could vary depending on the intended user. A typical length would be approximately 7″ with a +−5 inch circumference sufficient to encircle the bar which is is placed around. The inner diameter would have a similar variance with a starting inner diameter of 1 inch Typical pull up bars have slightly larger diameters. The material of the grips would allow for adapting to this change. 
         [0013]    In a preferred embodiment, both inner and outer surfaces of the grip may be textured, a unique feature compared to any other grips available. The inner diameter would aid in the grip staying in place on the piece of equipment. The hexagon shapes  12  on the interior would be in direct contact with the bars and could be a variety of patterns. (Pattern examples would be hexagon, honeycomb, diamond, herringbone, square, etc.) This inner diameter pattern is unique to grips. 
         [0014]    The outer diameter  14  which comes in contact with the users hands could vary in some of the patterns referenced above. The hexagon design  16  is the one used in the attached diagram. 
         [0015]    The following is a list of the types of suitable equipment for use: 
         [0016]    Pull Up Bars: Brands such as Rogue Fitness, Pro Source, Iron Gym, Black Mountain, Ultimate Body, Go Fit, Champion, P90X, etc. 
         [0017]    Kettlebells: Ader, Dragon Door, Peform Better, Lifeline, Kettlebell Concepts, Valeo, Iron Masters, Kettlestacks, Hampton, etc. 
         [0018]    Barbells: Ivanko, Rogue, Cemco, Leiko, Weider, Hampton, etc. 
         [0019]    The grips themselves can be made out of many different types of materials. Examples would include rubber, foam, plastic, cork, polyurethane, gel, etc. Preferred is one of the many thermoplastics or elastomers. Within these varying materials, there are also varying styles and designs. The diagrams included use a hexagon design, but the utility of the grips is the same regardless of the patterns. 
         [0020]    The grip has an ergonomic design that mirrors the length of a user&#39;s hands and fingers. It also has a split center  18  to allow for the hands to be in contact with both the grip and the bar it is placed on.  FIG. 2  shows a grip  110  affixed to an exercise bar  112  with Velcro straps  21 ,  23  wrapped circumferentially around each end in a groove  20 ,  22  molded into each lateral end of the grip as best shown in  FIG. 1 . Velcro™ (trademark of Velcro Industries, Curacao) is a brand name for a well-known type of hook-and-loop fasteners, hook-and-pile fasteners, or touch fasteners (colloquially known as Velcro after consist of two components: typically, two lineal fabric strips or, alternatively, round “dots” or squares) which are attached (sewn or otherwise adhered) to the opposing surfaces to be fastened. The first component features tiny hooks; the second features even smaller and “hairier” loops. When the two components are pressed together, the hooks catch in the loops and the two pieces fasten or bind temporarily during the time that they are pressed together. When separated, by pulling or peeling the two surfaces apart, the strips make a distinctive “ripping” sound. Touch fasteners are made in various strengths and constructions. 
       Natural and Synthetic Rubber for Making the Grips 
       [0021]    Materials useful in manufacturing the article of this invention include natural or synthetic elastomers. Representative of the highly unsaturated polymers which may be employed in the practice of this invention are diene elastomers. Such elastomers will typically possess an iodine number of between about 100 and about 400, although highly unsaturated rubbers having a higher or a lower (i.e., of 50-100) iodine number may also be employed. Illustrative of the diene elastomer which may be utilized are polymers based on conjugated dienes such as 1,3-butadiene: 2-methyl-1,3-butadiene: 1,3-pentadiene: 2,3-dimethyl-1,3-butadiene; and the like, as well as copolymers of such conjugated dienes with monomers such as styrene, alpha-methylstyrene, acrylonitrile, methacrylonitrile, methyl acrylate, ethyl acrylate, methyl methacrylate, ethyl methacrylate, vinyl acetate and the like. Preferred highly unsaturated rubbers include natural rubber, cis-polyisoprene, polybutadiene, poly(styrene-butadiene), polychloroprene and poly(acrylonitrile-butadiene). Moreover, mixtures of two or more highly unsaturated rubbers may be employed. Also, mixtures of the highly unsaturated rubbers with elastomers having lesser unsaturation (iodine number between 10-100) such as EPDM, EPR, butyl or halogenated butyl rubbers are also very useful in articles of the invention. 
         [0022]    The curative system employed when blends of highly unsaturated and lesser unsaturation rubbers are utilized is critical to good physical properties. This preferred system comprises a sulfur containing cure component selected from sulfur or a sulfur donor compound, at least one sulfur cure accelerator and at least one organic peroxide curative. 
         [0023]    The sulfur donor compounds which may be employed in conjunction with or in the alternative to sulfur are well known to those skilled in the art of rubber compounding. Illustrative of such sulfur donor compounds are 2-(4-morpholinyldithio)benzothiazole, tetramethylthiuram disulfide, tetraethylthiuram disulfide, dipentamethylene thiuram hexasulfide, N,N′-caprolactam disulfide and the like. 
         [0024]    The sulfur cure accelerators which may be employed include thioureas, such as N,N′-dibutylthiourea, 2-mercaptoimidazoline, tetramethylthiourea and the like; guanidine derivatives, such as N,N′-diphenylguanidine and the like; xanthates, such as zinc dibutylxanthate and the like; dithiocarbamates, such as zinc dimethyldithiocarbamate, zinc diethyldithiocarbamate, zinc dibutyldithiocarbamate, sodium diethyldithiocarbamate, and the like; thiuramsulfides, such as dipentamethylenethiuram disulfide, dipentamethylenethiuram hexasulfide, tetrabutylthiuram monosulfide, tetramethylthiuram monosulfide, tetraethylthiuram monosulfide, tetraethylthiuram disulfide and the like; heterocyclics, such as mercaptobenzimidazole, mercaptobenzthiazole, 2,2′-dibenzothiazyl disulfide, zinc 2-mercaptobenzothiazole and the like: and sulfenamides, such as N-oxydiethylene-2-benzothiazolesulfenamide, N-t-butylbenzothiazylsulfenamide, N-cyclohexyl2-benzothiazylsulfenamide, N,N-diisopropyl-2-benzothiazylsulfenamide and the like. Moreover, mixtures of two or more sulfur cure accelerators may be employed in the curing agent. The preferred accelerators are thiazoles and sulfenamides, with sulfenamides being particularly preferred. 
         [0025]    The peroxides which may be employed in this invention have an activation temperature which is below the decomposition temperature of the rubbers employed. Illustrative of such peroxides are benzoyl peroxide, dibenzoyl peroxide, 1,3-bis(t-butylperoxyisopropyl)benzene, diacetyl peroxide, butyl 4,4-bis(t-butylperoxy)valerate, p-chlorobenzoyl peroxide, cumene hydroperoxide, t-butyl cumyl peroxide, t-butyl perbenzoate, di-t-butyl peroxide, dicumyl peroxide, 2,5-dimethyl-2,5-di-t-butylperoxyhexane, 2,5-dimethyl-2,5-di-t-butyl-peroxyhex-3-yne, 4-methyl-2,2-di-t-butylperoxypentane and the like. Mixtures of two or more peroxides may also be employed. The preferred peroxides are dicumyl peroxide and 2,5-dimethyl-2,5-di-t-butylperoxyhexane. 
         [0026]    The highly unsaturated polymers to be protected may be formulated in conventional manner with the many usual compounding ingredients, for example, vulcanizing agents, accelerators, activators, retarders, antiozonants, antioxidants, plasticizing oils and softeners, fillers, reinforcing pigments and carbon blacks. 
       Silicone Rubber for Making the Grips 
       [0027]    There are also many special grades and forms of silicone rubber, including: steam resistant, metal detectable, high tear strength, extreme high temperature, extreme low temperature, electrically conductive, chemical/oil/acid/gas resistant, low smoke emitting, and flame-retardant. A variety of fillers can be used in silicone rubber, although most are non-reinforcing and lower the tensile strength. 
         [0028]    Silicone rubber is available in a range or hardness levels, expressed as Shore A or IRHD between 10 and 100, the higher number being the harder compound. It is also available in virtually any colour and can be colour matched. 
         [0029]    Injection molding of liquid silicone rubber (LSR) is a process to produce pliable, durable parts in high volume. 
         [0030]    Liquid silicone rubber is a high purity platinum cured silicone with low compression set, great stability and ability to resist extreme temperatures of heat and cold ideally suitable for production of parts, where high quality is a must. Due to the thermosetting nature of the material, liquid silicone injection molding requires special treatment, such as intensive distributive mixing, while maintaining the material at a low temperature before it is pushed into the heated cavity and vulcanized. 
         [0031]    Chemically, silicone rubber is a family of thermoset elastomers that have a backbone of alternating silicon and oxygen atoms and methyl or vinyl side groups. Silicone rubbers constitute about 30% of the silicone family, making them the largest group of that family. Silicone rubbers maintain their mechanical properties over a wide range of temperatures and the presence of methyl-groups in silicone rubbers makes these materials extremely hydrophobic. 
         [0032]    Liquid silicone rubber are products that require high precision or smooth surfaces. Silicone rubber or other rubbers or plastics may be overmolded onto the magnetic strips. 
       Plastic Materials Useful for Making the Grips With Magnetic Strips 
       [0033]    Possible Thermoplastic Polymers which have utility are listed with the Tm or Tg sometimes listed after it. 
         [0000]    
       
         
               
               
               
               
               
             
               
               
             
               
               
               
               
               
             
           
               
                   
               
             
             
               
                 Acrylonitrile butadiene styrene (ABS) 
                   
                   
                   
                   
               
               
                 Acrylic (PMMA) 
                 130-140° 
                 C. 
               
               
                 Celluloid 
               
               
                 Cellulose acetate 
               
               
                 Cyclic Olefin Copolymer (COC) 
               
               
                 Ethylene-Vinyl Acetate (EVA) 
               
               
                 Ethylene vinyl alcohol (EVOH) 
               
               
                 Fluoroplastics (PTFE, alongside with 
               
               
                 FEP, PFA, CTFE, ECTFE, ETFE) 
               
               
                 Ionomers 
               
               
                 Kydex, a trademarked acrylic/PVC alloy 
               
               
                 Liquid Crystal Polymer (LCP) 
               
               
                 Polyoxyme thylene (POM or Acetal) 
                 166° 
                 C. 
               
               
                 Polyacrylates (Acrylic) 
               
               
                 Polyacrylonitrile (PAN or Acrylonitrile) 
               
               
                 Polyamide (PA or Nylon) 
               
               
                 Polyamide-imide (PAI) 
               
               
                 Polyaryletherketone (PAEK or Ketone) 
               
               
                 Polybutadiene (PBD) 
               
               
                 Polybutylene (PB) 
               
               
                 Polybutylene terephthalate (PBT) 
                 160° 
                 C. 
                 40° 
                 C. 
               
               
                 Polycaprolactone (PCL) 
                 62° 
                 C. 
               
               
                 Polychlorotrifluoroethylene (PCTFE) 
               
               
                 Polyethylene terephthalate (PET) 
                 260° 
                 C. 
                 75° 
                 C. 
               
               
                 Polycyclohexylene dimethylene 
               
               
                 terephthalate (PCT) 
               
               
                 Polycarbonate (PC) 
                 267° 
                 C. 
               
             
          
           
               
                 Polyhydroxyalkanoates (PHAs) 
                 145l 
               
             
          
           
               
                 Polyketone (PK) 
                   
                   
                   
                   
               
               
                 Polyester 
                 260 
                 C. 
                 75 
                 C. 
               
               
                 Polyethylene (PE) 
                 105-130° 
                 C. 
                 −127° 
                 C. 
               
               
                 Polyetheretherketone (PEEK) 
                 343° 
                 C. 
                 143° 
                 C. 
               
               
                 Polyetherketoneketone (PEKK) 
               
               
                 Polyetherimide (PEI) 
               
               
                 Polyethersulfone (PES) - see Polysulfone 
               
               
                 Chlorinated Polyethylene (CPE) 
               
               
                 Polyimide (PI) 
               
               
                 Polylactic acid (PLA) 
                 50-80° 
                 C. 
               
               
                 Polymethylpentene (PMP) 
               
               
                 Polyphenylene oxide (PPO) 
               
               
                 Polyphenylene sulfide (PPS) 
               
               
                 Polyphthalamide (PPA) 
               
               
                 Polypropylene (PP) 
                 160° 
                 C. 
               
               
                 Polystyrene (PS) 
                 240° 
                 C. 
               
               
                 Polysulfone (PSU) 
               
               
                 Polytrimethylene terephthalate (PTT) 
               
               
                 Polyurethane (PU) 
               
               
                 Polyvinyl acetate (PVA) 
                 32° 
                 C. 
               
               
                 Polyvinyl chloride (PVC) 
                 80° 
                 C. 
               
               
                 Polyvinylidene chloride (PVDC) 
                 185° 
                 C. 
                 40° 
                 C. 
               
               
                 Styrene-acrylonitrile (SAN) 
               
               
                   
               
             
          
         
       
     
         [0034]    Some methods of molding thermosets and thermoplastics are:
   Reactive injection molding (used for objects such as milk bottle crates)   Extrusion molding (used for making pipes, threads of fabric and insulation for electrical cables)   Compression molding (used to shape most thermosetting plastics)   Spin casting (used for producing fishing lures and jigs, gaming miniatures, figurines, emblems as well as production and replacement parts)   
 
       Broad Listing of Materials for Manufacture of Grips 
       [0039]    Suitable materials for the highly flexible compositions with optional additional fillers encompass many types of materials including those that follow. The organic polymers suitable for forming the grips can comprise polyacetals, polyureas, polyurethanes, polyolefins, polyacrylics, polycarbonates, polyalkyds, polystyrenes, polyesters, polyamides, polyaramides, polyamideimides, polyarylates, polyarylsulfones, polyethersulfones, polyphenylene sulfides, polysulfones, polyimides, polyetherimides, polytetrafluoroethylenes, polyetherketones, polyether etherketones, polyether ketone ketones, polybenzoxazoles, polyoxadiazoles, polybenzothiazinophenothiazines, polybenzothiazoles, polypyrazinoquinoxalines, polypyromellitimides, polyquinoxalines, polybenzimidazoles, polyoxindoles, polyoxoisoindolines, polydioxoisoindolines, polytriazines, polypyridazines, polypiperazines, polypyridines, polypiperidines, polytriazoles, polypyrazoles, polycarboranes, polyoxabicyclononanes, polydibenzofurans, polyphthalides, polyacetals, polyanhydrides, polyvinyl ethers, polyvinyl thioethers, polyvinyl alcohols, polyvinyl ketones, polyvinyl halides, polyvinyl nitriles, polyvinyl esters, polysulfonates, polysulfides, polythioesters, polysulfones, polysulfonamides, polyureas, polyphosphazenes, polysilazanes, polyolefins, polysiloxanes, fluoropolymers, polybutadienes, polyisoprenes, urethane acrylates, urethane methacrylates, natural rubber, nitrile rubber, or other synthetic polymers or co-polymers, polyblends that exhibit high flexibility or elastomeric properties, or a combination comprising at least one of the foregoing organic polymers. Exemplary organic polymers are polyurethanes, polyureas, fluoropolymers, urethane acrylates /methacrylates, fluorinated urethanes, fluorinated polyurea, copolymer or polyblends of polyurethane, polyurea or fluoropolymers. It is desirable for the polyurethane, the polyurea, and the fluoropolymers, to be an elastomer. The aforementioned organic polymers listed above can be blended and/or copolymerized with the polyurethane or polyurea if desired. The base elastomers can be fully reacted such as water based polyurethane, fully reacted thermoplastic elastomers such as polyurethane, TPR (Thermoplastic rubber), EPDM rubber, nitrile rubber, chlorinated rubber, butyl rubber, SBR (styrene butadiene) rubber, fluoroelastomer, silicone rubber, natural rubber, etc. 
       Polyurethanes and Polyurea Elastomers for the Grips 
       [0040]    The most preferred elastomer is polyurethane, polyurea and fluoroelastomers. Polyurethane and polyurea are both sometimes referred as polyurethane commercially. In this application, urethane copolymers, urea copolymers are also regarded as polyurethanes. 
         [0041]    The isocyanates in the polyurethane elastomers can be aromatic or aliphatic. Useful aromatic diisocyanates can include, for example, 2,4-toluene diisocyanate and 2,6-toluene diisocyanate (each generally referred to as TDI); mixtures of the two TDI isomers; 4,4′-diisocyanatodiphenylmethane (MDI); p-phenylene diisocyanate (PPDI); diphenyl-4,4′-diisocyanate; dibenzyl-4,4′-diisocyanate; stilbene-4,4′-diisocyanate; benzophenone-4,4′-diisocyanate; 1,3- and 1,4-xylene diisocyanates; or the like, or a combination comprising at least one of the foregoing aromatic isocyanates. 
         [0042]    Useful aliphatic diisocyanates can include, for example, 1,6-hexamethylene diisocyanate (HDI); 1,3-cyclohexyl diisocyanate; 1,4-cyclohexyl diisocyanate (CHDI); the saturated diphenylmethane diisocyanate known as H(12)MDI; isophorone diisocyanate (IPDI); or the like; or a combination comprising at least one of the foregoing isocyanates. 
         [0043]    Other exemplary polyisocyanates include hexamethylene diisocyanate (HDI), 2,2,4- and/or 2,4,4-trimethyl-1,6-hexamethylene diisocyanate, dodecamethylene diisocyanate, 1,4-diisocyanatocyclohexane, 1-isocyanato-3,3,5-trimethy-5-isocyanatomethylcyclohexane (IPDI), 2,4′- and/or 4,4′-diisocyanato-dicyclohexyl methane, 2,4- and/or 4,4′-diisocyanato-diphenyl methane and mixtures of these isomers with their higher homologues which are obtained by the phosgenation of aniline/formaldehyde condensates, 2,4-and/or 2,6-diisocyanatotoluene and any mixtures of these compounds. 
         [0044]    In one embodiment, derivatives of these monomeric polyisocyanates can be used. These derivatives include polyisocyanates containing biuret groups as described, for example, in U.S. Pat. No. 3,124,605, U.S. Pat. No. 3,201,372 and DE-OS 1,101,394; polyisocyanates containing isocyanurate groups as described, for example, in U.S. Pat. No. 3,001,973, DE-PS 1,022,789, 1,222,067 and 1,027,394 and DE-OS 1,929,034 and 2,004,048; polyisocyanates containing urethane groups as described, for example, in DE-OS 953,012, BE-PS 752,261 and U.S. Pat. Nos. 3,394,164 and 3,644,457; polyisocyanates containing carbodiimide groups as described in DE-PS 1,092,007, U.S. Pat. No. 3,152,162 and DE-OS 2,504,400, 2,537,685 and 2,552,350; and polyisocyanates containing allophanate groups as described, for example, in GB-PS 994,890, BE-PS 761,626 and NL-OS 7,102,524. In another embodiment, N,N′,N″-tris-(6-isocyanatohexyl)-biuret and mixtures thereof with its higher homologues and N,N′,N″-tris-(6-isocyanatohexyl)-isocyanurate and mixtures thereof with its higher homologues containing more than one isocyanurate ring can be used. 
         [0045]    Examples of suitable polyols are polyester polyols, polycaprolactone polyols, polyether polyols, polyhydroxy polycarbonates, polyhydroxy polyacetals, polyhydroxy polyacrylates, polyhydroxy polyester amides and polyhydroxy polythioethers. Exemplary polyols are polyester polyols, polyether polyols, polyesters derived from lactones (e.g., ε-caprolactone or ω-hydroxycaproic acid), or a combination comprising at least one of the foregoing polyols. 
         [0046]    Exemplary isocyanate prepolymers are TDI-ether, TDI-ester, TDI-lactone, MDI-ether, MDI-ester, H12MDI-ether, H12MDI-ester and similar prepolymers made from HDI, IPDI and PPDI. The isocyanate prepolymers with low free isocyanate monomers are preferred. 
         [0047]    The grip composition also comprises an optional curing agent. Examples of suitable curing agents are aromatic amines that can be used as curing agents are phenylene diamine, 4,4′methylene-bis-(2-chloroaniline), 4,4′methylenedianiline (MDA), 4,4′methylenebis(2,6-diethylaniline), 4,4′methylenebis(2,6-dimethylaniline), 4,4′methylenebis(2-isopropyl-6-methylaniline), 4,4′methylenebis(2ethyl-6-methylaniline), 4,4′methylenebis(2,6-isopropylaniline), 4,4′methylenebis(3-chloro-2,6-diethylaniline) (MCDEA), 1,3-propanediolbis(4-aminobenzoate), diethyltoluenediamine (DETDA), dimethylthiotoluenediamine; or the like; or a combination comprising at least one of the foregoing aromatic amines. Polyaspartic esters may be used. Polyol curatives are polyester polyols, polycaprolactone polyols, polyether polyols, polyhydroxy polycarbonates, polyhydroxy polyacetals, polyhydroxy polyacrylates, polyhydroxy polyester amides and polyhydroxy polythioethers. Exemplary polyols are polyester polyols, polyether polyols, polyesters derived from lactones (e.g., ε-caprolactone or ω-hydroxycaproic acid), or a combination comprising at least one of the foregoing polyols. Imines are useful curatives, including aldimines, ketimines, and multifunctional imines. In addition to the above, curing agents that can produce elastomeric polymers with the isocyanate-terminated prepolymers or polyisocyanates are suitable. Additional examples of other suitable curing agents are listed in patent application Ser. No. 11/136,827, filed May 24, 2005, which is incorporated herein by reference. 
         [0048]    Atmospheric moisture may serve to cure solely or may catalyze the reaction between the polyurethane and the curing agent. This is referred to as moisture cure. For aqueous coatings, polyurethane dispersions can be used with or without curing agents. The crosslinking of aqueous polyurethane dispersions may be accomplished by the use of isocyanates, epoxy, aziridines, carbodiimides, and other functional materials. 
         [0049]    Other additives useful in the grip compositions include leveling agents, adhesion promoters, coupling agents, defoamers, hydrolysis stabilizers, UV stabilizers, pigments, dispersants, curing accelerators, diluents, or combinations thereof. 
         [0050]    The fillers that may be used with the base polymer to make the grip include, but are not limited to, the following list: 
         [0051]    silicates (such as talc, clays, (montmorillonite) feldspar, mica, calcium silicate, calcium metasilicate, sodium aluminosilicate, sodium silicate), metal sulfates (such as calcium sulfate, barium sulfate, sodium sulfate, aluminum sodium sulfate, aluminum sulfate), gypsum, aluminum trihydrate, metal oxides (such as calcium oxide (lime), aluminum oxide, titanium dioxide, iron oxide, tin oxide) and metal sulfites, metal powders, metal flakes, metal fibers, milled metal fibers, metal nitrides, graphite, carbon nanotubes, carbon fibers and milled carbon fibers, silica (such as quartz, glass beads, glass bubbles and glass fibers), metal-coated glass spheres, metal-coated hollow spheres, buckyballs, electroactive polymers, antimony-doped tin oxide, carbon blacks, coke, micro-balloons, and oxides, borides, carbides, nitrides and silicas from the group of compounds containing boron, aluminum, silicon, titanium, tungsten, and zirconium compounds. 
         [0052]    Examples of organic based fillers can be used include thermoplastic powdery material such as polycarbonate, polyetherimide, polyester, polyethylene, polysulfone, polystyrene, acrylonitrile-butadiene-styrene block copolymer, Teflon, fluoropolymers, polypropylene, acetal polymers, polyvinyl chloride, polyurethanes, polyureas, nylon and combinations thereof. In general, some useful thermoplastic polymers are those having a high melting temperature or good heat resistance properties. There are several ways to form a thermoplastic abrasive particle known in the art. 
         [0053]    The filler content in the grip, based on the total solid weight, can range from 10% by weight to 90%, depending on the interaction of the fillers and the base elastomers. Preferred is 20% to 80% by weight and more preferred is 30% to 70% by weight. 
         [0054]    While the invention has been described with reference to exemplary embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claims.