Class / Patent application number | Description | Number of patent applications / Date published |
474238000 | Including plural interconnected and transversely spaced pairs of oppositely facing side-drive surfaces (e.g., plural "V-belts", etc.) | 8 |
20090075770 | Power transmission belt - It is an object of the present invention to improve the long-term durability of a power transmission belt. There is provided a power transmission belt characterized in that it includes a rubber layer that is formed of a cross-linked rubber composition and extends in a belt lengthwise direction, and core wires that is adhered to the rubber layer and embedded therein in the belt lengthwise direction, in which the rubber layer with the core wires embedded therein is formed to have a tensile stress of 1.1 to 1.7 MPa when the rubber layer is stretched in the belt lengthwise direction by 10% at 125° C. | 03-19-2009 |
20090264236 | FRICTION DRIVING BELT AND PROCESS FOR MANUFACTURING THE SAME - In a friction drive belt B, at least a contact part | 10-22-2009 |
20100216583 | V-RIBBED BELT HAVING AN OUTER SURFACE WITH IMPROVED COEFFICIENT OF FRICTION - A V-ribbed belt for a mechanical power transmission is disclosed. The V-ribbed belt comprises an outer back-side surface, an inner front-side surface, and a load-carrying section disposed between the front-side and back-side surfaces. The front-side surface includes a plurality of laterally spaced longitudinally extending v-ribs. The back-side surface includes a plurality of raised features that, when running on a flat-faced, back-side pulley, form a contact patch of about 20% to about 50% of that of a traditional flat-faced belt running on a flat-faced pulley. The reduced contact patch provides increased contact pressure which in turn provides an improved effective coefficient of friction between the belt and the pulley. | 08-26-2010 |
20100298079 | FRICTION TRANSMISSION BELT - In a friction transmission belt in which a compression rubber layer provided to an inner circumferential side of the belt body is wrapped over pulleys such that the compression rubber layer contacts the pulleys, such a configuration that both of a noise reduction and durability while the belt is running can be achieved is obtained. The compression rubber layer is configured so as not to include short fibers and so as to have a surface roughness, i.e., an Ra of at least a pulley contact surface of the compression rubber layer equal to or more than 3 μm. | 11-25-2010 |
20120115658 | ELASTIC DRIVE BELT, IN PARTICULAR RIBBED V-BELT, HAVING REDUCED LOSS OF TENSION - A drive belt has a foundational body made of a polymeric material with elastic properties including a top ply as belt backing and a substructure having a force transmission zone. At least one tensile strand in cord construction is embedded in the drive belt. The tensile strand is completely or partially made of a polyethylene terephthalate (PET), wherein the PET is formed of a yarn associated with the following yarn and cord parameters: a cord linear density of ≦3600 dtex; a yarn hot air thermal shrinkage ≦5% after 2 minutes at 177° C. and at a pre-tension of 0.0005 N/dtex; a corresponding yarn force of ≧3.4 cN/dtex at an elongation of 5% at 25° C. and at a pretension of 0.0005 N/dtex; and a cord hot air thermal shrinking force of ≧0.12 cN/dtex in hot air at 160° C. after 10 minutes and at a pre-tension of 0.0005 N/dtex. | 05-10-2012 |
20120214630 | V-RIBBED BELT HAVING AN OUTER SURFACE WITH IMPROVED COEFFICIENT OF FRICTION - A V-ribbed belt for a mechanical power transmission. The V-ribbed belt comprises an outer back-side surface, an inner front-side surface, and a load-carrying section disposed between the front-side and back-side surfaces. The front-side surface includes a plurality of laterally spaced longitudinally extending v-ribs. The back-side surface includes a plurality of raised features that, when running on a flat-faced, back-side pulley, form a contact patch of about 20% to about 50% of that of a traditional flat-faced belt running on a flat-faced pulley. The reduced contact patch provides increased contact pressure which in turn provides an improved effective coefficient of friction between the belt and the pulley. | 08-23-2012 |
20120329591 | BELT FOR DRIVING SYSTEMS, IN PARTICULAR A BELT-LIKE TENSILE ELEMENT FOR ELEVATOR SYSTEMS, HAVING FIRE-INHIBITING PROPERTIES - A belt for driving systems, including a belt body made of a polymeric material having elastic properties, which comprises a cover layer as a back of the belt and a foundation having a force-transmission zone, and, a tensile reinforcement embedded in the belt body. The belt body is made of at least two different materials A and B, namely: a first material A, which is provided with a fire-inhibiting additive and is used in the belt body everywhere the high mechanical properties are not required; and, a second material B, which contains little or none of a fire-inhibiting additive and is used in the area of the belt body that is subjected to great mechanical stress. The belt is used in particular as a tensile element for elevator systems. | 12-27-2012 |
20140135161 | V-Ribbed Belt and Method for Manufacturing Same - A V-ribbed belt that includes a ribbed surface covered with fabric is provided. The fabric is stretchable in two predetermined directions. A method for manufacturing the V-ribbed belt is also provided. The method includes placing a belt matrix about a mandrel, placing a fabric about the external circumference of the belt matrix which wraps around the mandrel, placing the mandrel inside a shell having a plurality of grooves on the internal circumference, expanding the belt matrix and the fabric toward the internal circumference of the shell and thus pressing the fabric onto the internal circumference having the multi-ribbed structure, and curing the belt matrix with the fabric. The fabric is stretchable to accommodate itself to the multi-ribbed structure. | 05-15-2014 |