Abstract: A protective cover member for a guide block on a drive belt includes an inner portion shaped to substantially conform to at least a portion of the outer surface of the guide block. The cover member is attached to the guide block by bonding the cover member to the guide block, mechanical fasteners such as screws or bolts, and/or using an interference design whereby the cover member is retained by frictional forces or by snapping around a portion of the guide block. The outer surface of the cover member is shaped and sized to be engaged by drive members associated with a drive wheel. The cover member may be constructed of material that is capable of withstanding higher temperatures and forces compared to the material of the guide blocks.

Abstract: In one embodiment of the present invention, a protective cover member for a guide block on a drive belt includes an inner portion shaped to substantially conform to at least a portion of the outer surface of the guide block. The cover member is attached to the guide block using suitable attachment means such as bonding the cover member to the guide block, mechanical fasteners such as screws or bolts, and/or using an interference design whereby the cover member is retained by frictional forces or by snapping around a portion of the guide block. The outer surface of the cover member is shaped and sized to be engaged by drive members associated with a drive wheel. The cover member may be constructed of material that is capable of withstanding higher temperatures and forces compared to the material of the guide blocks.

Abstract: A thermoplastic polyurethane elastomeric seal composition comprising, by weight, about 90% to 99% thermoplastic polyurethane elastomer and about 1% to 10% fibers. Also, the thermoplastic polyurethane elastomer is derived from the reactants comprising: (i) a mixture of polyol and an aromatic chain extender in a molar ratio in the range of from about 40:60 to about 60:40 of butanediol glycol adipate to hydroquinone bis 2-hydroxyethyl ether, and (ii) 1,5 naphthalene diisocyanate present in a molar ratio in the range of about 50:50 to about 54.5:45.5 of 1,5 naphthalene diisocyanate to the said first mixture of polyol and an aromatic chain extender. After curing, the thermoplastic polyurethane elastomeric seal compound has outstanding wear resistance and low compression set.This thermoplastic polyurethane elastomeric seal compound is particularly useful in making shaft seals subject to high wear and high pressure, for use in hydraulic rams in earthmoving equipment.

Abstract: A new polyetherpolyurethane system for the formation of end caps for oil filters is disclosed using a blended oxyalkylene polyol having a functionality greater than 2 and the absence of any oxyethylene component. The blend having a functionality greater than 2 is mixed with a diol cross linker prior to reacting with an isocyanate.

Abstract: A high viscosity, solvent-resistant, thermoset polyetherpolyurethane molded article that includes a methylene-bridged polyarylpolyisocyanate component and a polyether polyol solution combined in catalytic urethane-forming reaction where the polyether polyol solution of the urethane-forming reaction includes a diol first component, a polyether polyol second component, a polyether polyol third component, and a polymer polyol fourth component having a nonaqueous dispersant stabilizer.