| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 152543000 | Chafer or sealing strips | 31 |
| 20090020207 | Rubber Composition for Chafer - There is provided a rubber composition for a chafer, enabling generation of crack in a chafer at mounting or dismounting a rim to be suppressed as well as improving durability of a bead part by improving hardness and elongation at break. Namely, the present invention provides a rubber composition for a chafer, which comprises a rubber component comprising a butadiene rubber in which syndiotactic-1,2-polybutadiene having an average primary particle diameter of not more than 100 nm is dispersed, and has a JIS-A harness of 75 to 85 and elongation at break in a tensile test of not less than 180%. | 01-22-2009 |
| 20090056851 | Heavy duty tire - A heavy duty tire comprises: a bead filler disposed radially outside a bead core and axially outside a carcass main portion; a bead-reinforcing layer made of steel cords; and a chafer made of a rubber extending along the bead bottom surface. The chafer rubber has a complex elastic modulus in a range of 8 to 12 MPa and a 100% modulus in a range of 4.0 to 5.5 MPa. In the bead-reinforcing layer, the steel cord count is 25 to 40/5 cm, the steel cord diameter is 0.8 to 1.2 mm, and the cord angle is 30 to 60 degrees with respect to the tire radial direction. The bead filler comprises a main filler made of a low modulus rubber and a fastening filler made of a high modulus rubber. The fastening filler has an L-shaped cross sectional shape and comprises an axially-extending base portion and a radially-extending axially inner portion. The main filler has a part wedged between the base portion and axially inner portion of the fastening filler. | 03-05-2009 |
| 20090107608 | TIRE WITH RESISTANCE TO RIM SLIP - This invention relates to a tire with resistance to rim slip, namely slippage of a rubber tire on an associated rigid wheel rim of a tire/rim assembly. The invention relates to a rubber chafer component of a tire for seating the tire against a rigid tire rim. The rubber chafer component is comprised of a rubber composition which contains zinc rosinate within and on the surface of said rubber composition, and thereby the chafer component promotes an increased coefficient of friction of the chafer component against a rigid tire rim of a tire/rim assembly as compared to a more conventional zinc stearate contained in a tire chafer rubber composition. The zinc rosinate is a product of rosin acid and zinc oxide formed in situ within said rubber composition of is added directly to the rubber composition as zinc rosinate. The more conventional zinc stearate is a product of stearic acid and zinc oxide formed in situ within a rubber composition. | 04-30-2009 |
| 20100012249 | PNEUMATIC TIRE - A pneumatic tire includes: a pair of bead portions | 01-21-2010 |
| 20100147436 | TIRE WITH CHAFER - The present invention relates to a pneumatic tire having a pair of spaced apart bead components, a connecting carcass between said bead components, and a rubber chafer positioned around at least a portion of each of said bead components and intended for contacting a rigid rim of a wheel, wherein said chafer comprises an outer skin layer intended for contacting the rigid rim and an inner core layer disposed radially inward of the skin layer. | 06-17-2010 |
| 20110186202 | TIRE HAVING GUM STRIP AND CHAFER - A tire having a circumferential tread, at least one belt, an inner liner, a pair of sidewalls, at least one carcass ply, and a pair of bead portions. The pair of bead portions each further includes a bead core, a bead filler having an upper end, a chaffer, and a gum strip. The chaffer extends axially outward from the inner liner towards the sidewall and curves radially upward along an axially outer portion of the bead core. The sidewall gum strip extends radially upward from a curved portion of the chaffer, wherein the sidewall gumstrip is located axially between the at least one carcass ply turn-up end and a sidewall. | 08-04-2011 |
| 20110192517 | TIRE - The present invention provides a tire having improved durability of a bead portion. Specifically, the present invention provides a tire having: at least one layer of carcass, including a carcass main body extending in a toroidal shape across a pair of bead cores and a carcass turn-up portion continuous with the carcass main body and wound around each bead core from the inner side toward the outer side in the tire widthwise direction and; at least two layers of textile chafer disposed on the tire-radial direction inner surface of the carcass with respect to the bead core; and at least one layer of wire chafer, characterized in that: in a state where the tire is assembled with a “design rim” prescribed in TRA and inflated at an inner pressure of 50 kPa and, providing that the center of a flange curvature of the rim is P and the outer most end in the tire radial direction of a portion covering the carcass main body, of the textile chafer, is A, an angle θ formed by a line passing P and in parallel with the tire rotation axis, with respect to a line linking P and A, is in a range of 20°≦θ≦60°. | 08-11-2011 |
| 20110198011 | PNEUMATIC TIRE - Provided is a pneumatic tire: which has an inner liner layer formed of a thermoplastic resin or a thermoplastic elastomer composition containing a blend of a thermoplastic resin with an elastomer; and which, despite of this, is free from air inclusion in bead parts and is capable of preventing curing failure attributable to the air inclusion. The pneumatic tire of the present invention includes: a carcass layer laid between a pair of bead parts; an inner liner layer disposed at a tire cavity side of the carcass layer; a tie rubber layer interposed between the carcass layer and the inner liner layer; and chafers for protecting the respective bead parts, an end portion on a tire cavity side of each chafer being inserted between the carcass layer and the inner liner layer. In the pneumatic tire, the inner liner layer is formed of a thermoplastic resin or a thermoplastic elastomer composition containing a blend of a thermoplastic resin with an elastomer; and the tie rubber layer is disposed between the inner liner layer and the chafer. | 08-18-2011 |
| 20120103497 | PNEUMATIC TIRE FOR HEAVY LOAD - In a pneumatic tire for heavy load in which a rubber chafer | 05-03-2012 |
| 20120160392 | TIRE WITH OPTIMIZED CHAFER - A pneumatic tire is described having a chafer which is formed of at least two zones. Each zone is formed of a different material, wherein the first zone extends from axially inward of the bead to a location axially outward and radially outward of the bead. A second zone extends from the end of the first zone to the tip of the chafer. The zones are preferably formed by extrusion to form one cohesive chafer. The first zone is formed of a material having a G″/G′ ratio in the range of about 0.2 to about 0.245. The second zone is formed of a material having a G″/G′ ratio in the range of about 0.155 to about 0.183. | 06-28-2012 |
| 20120168052 | PNEUMATIC RADIAL TIRE - Provided is a pneumatic radial tire having improved pinch cut resistance without increasing the weight of the tire. | 07-05-2012 |
| 20120186717 | PNEUMATIC RADIAL TIRE - A pneumatic radial tire has a carcass ply which extends between bead cores arranged in a pair of bead portions. The carcass ply is wound up to an outer side in a tire radial direction around the bead cores. A chafer is arranged in such a manner as to wrap around the carcass ply from an inner side to an outer side in a tire width direction, around the bead core. An inner end of the chafer positioned in the inner side in the tire width direction is arranged in the outer side in the tire radial direction than a winding end of the carcass ply. A reinforcing rubber tapering off toward the outer side in the tire radial direction is provided adjacently to the outer side in the tire radial direction of the inner end of the chafer. | 07-26-2012 |
| 20120211141 | PNEUMATIC TIRE - A pneumatic tire having a pair of bead portions; bead cores each having a polygonal cross section; a radial carcass having respective ends wound around the corresponding bead cores from the inner to outer side; one layer of wire chafer disposed outwardly of the radial carcass relative to the bead core; and a rubber chafer in a contact area between the bead portion and a prescribed rim, wherein, in a cross section of the tire assembled with the prescribed rim, the angle between the bottom side of the bead core and a bead seat of the prescribed rim is in the range of 0±2°, and a portion, on the tire outer surface side, of an outermost layer filament of steel cords constituting the wire chafer extends at an angle in the range of 90±5° relative to the extending direction of ply cords of the radial carcass. | 08-23-2012 |
| 20120305160 | Carcass Reinforcement for an Airplane Tire - A technique for comprising the compression fatigue rupture strength of the carcass reinforcement external layer ( | 12-06-2012 |
| 20120325391 | RUBBER COMPOSITION FOR CLINCH OR CHAFER, AND PNEUMATIC TIRE - The present invention aims to provide a rubber composition for a clinch or chafer which enables to improve the rim chafing resistance, elongation at break, handling stability, and fuel economy in a balanced manner, and to reduce the number of broken spews in tire demolding; and a pneumatic tire produced using the rubber composition. The rubber composition for a clinch or chafer includes 100 parts by mass of a rubber component; 1.2 to 2.9 parts by mass of zinc oxide; and 2.2 to 4.0 parts by mass of stearic acid, the rubber component including 15 to 80% by mass of a butadiene rubber and 15 to 50% by mass of an isoprene-based rubber based on 100% by mass of the rubber component. | 12-27-2012 |
| 20130240108 | PNEUMATIC RADIAL TIRE - A wind-up side cord of a chafer is arranged in such a manner that an angle of inclination of a first line connecting a first point and a second point with respect to a tire circumferential direction is 20 to 40 degrees, and is formed as a circular arc shape which is convex to an outer side in the tire radial direction, a turn-up side cord of the chafer is arranged in such a manner that an angle of inclination of a second line connecting a third point and a fourth point with respect to the tire circumferential direction is 30 to 50 degrees, and is equal to or less than 5 degrees in a change of the angle of inclination with respect to the tire circumferential direction, and a distance in the tire circumferential direction from a fifth point to the first line is 2 to 12 mm. | 09-19-2013 |
| 20130340912 | TIRE WITH CHAFER COMPONENT - This invention relates to a tire having a chafer component, particularly tires expected to be used for heavy duty service in a sense of carrying heavy loads such as for example truck tires. | 12-26-2013 |
| 20140130954 | TIRE WITH CHAFER AND SIDEWALL - The present invention relates to a pneumatic tire having a pair of spaced apart bead components, a connecting carcass between the bead components, a pair of sidewalls overlying the carcass, and a rubber chafer adjacent to each of the sidewalls and positioned around at least a portion of each of the bead components and intended for contacting a rigid rim of a wheel, wherein the chafers comprise 100 parts by weight of elastomer; 20 to 60 phr of a low surface area carbon black having an Iodine absorption value in a range of from about 10 to about 50 as measured by ASTM D1510; 20 to 60 phr of a high surface area carbon black having an Iodine absorption value in a range of from about 100 to about 300 g/kg as measured by ASTM D1510; wherein the sidewalls comprise 100 phr of the same elastomer used in the chafers; 20 to 60 phr of the same low surface area carbon black used in the chafers; 10 to 20 phr of the same high surface area carbon black used in the chafers; wherein the weight ratio of high surface area carbon black in the chafer to high surface area carbon black in the sidewall is greater than 1. | 05-15-2014 |
| 20140166180 | BEAD REINFORCING STRUCTURE FOR HEAVY DUTY TIRE - Disclosed is a bead reinforcing structure for a heavy duty tire having a bead in which a carcass is turned up to surround a bead core. The bead reinforcing structure includes a carcass, and an inside steel chafer having a first predetermined inclination angle and an outside steel chafer having a second predetermined inclination angle. The inside and outside steel chafers are disposed inside and outside the carcass, respectively, thereby reinforcing the bead from the inside and outside of the carcass. | 06-19-2014 |
| 20140196828 | RUBBER COMPOSITION FOR CANVAS CHAFER, AND PNEUMATIC TIRE - Provided are a rubber composition for a canvas chafer which, despite being low cost, is excellent in rim chafing resistance, resistance to rim damage, and processability (sheeting processability, rubber flow in the tire, adhesion to adjacent components) and performs well with respect to low heat build-up, and a pneumatic tire including the composition. The invention relates to a rubber composition for a canvas chafer, including: an isoprene-based rubber; a carbon black having an N | 07-17-2014 |
| 20140305568 | TIRE, THE CARCASS REINFORCEMENT OF WHICH IS REINFORCED WITH A LAYER OF REINFORCING ELEMENTS IN THE BEAD REGION - Tire having a radial carcass reinforcement anchored in each bead by an upturn around a bead wire, reinforced by at least one layer of reinforcing elements turned up around the bead wire, one end of said at least one layer of reinforcing elements being axially on the outside of the carcass reinforcement upturn and radially on the inside of the end of said upturn, the other end turned up around the bead wire being axially on the inside of the carcass reinforcement. The reinforcing elements are non-wrapped metal cords with saturated layers, having, in a permeability test, a flow rate of less than 5 cm | 10-16-2014 |
| 20140311650 | HEAVY DUTY PNEUMATIC TIRE | 10-23-2014 |
| 20150114540 | PNEUMATIC TIRE - A pneumatic tire according to the invention includes: a pair of left and right beads 3 each including a bead cores 3 | 04-30-2015 |
| 20150144244 | TIRE WITH CHAFER AND TOEGUARD - The present invention relates to a pneumatic tire having a pair of spaced apart bead components, a connecting carcass between the bead components, a pair of sidewalls overlying the carcass, and a rubber chafer portion adjacent to each of the sidewalls and positioned around at least a portion of each of the bead components and intended for contacting a rigid rim of a wheel, the rubber chafer portion comprising a radially innermost toe guard and a chafer adjacent to a radially outer end of the toe guard; wherein the ratio of a modulus of the toe guard to a modulus of the chafer is in the range of 3 to 10. | 05-28-2015 |
| 20150290984 | Tire Bead For Aircraft - Aircraft tire ( | 10-15-2015 |
| 20150360524 | AIR MAINTENANCE PUMPING SYSTEM AND TIRE - A tire assembly includes a tire having a pneumatic cavity, first and second sidewalls extending respectively from first and second tire bead regions to a tire tread region, the first sidewall having at least one bending region operatively bending when radially within a rolling tire footprint, and a chafer component with an air passageway defined by an air tube resiliently deforming segment by segment between an expanded condition and an at least partially collapsed condition in response to respective segment by segment deformation of the sidewall when radially within the rolling tire footprint. The tire assembly pumps a constant volume of air for every revolution of the tire thus providing a linear pumping rate regardless of dead volumes in the tire. | 12-17-2015 |
| 20160017124 | RUBBER COMPOSITION FOR TIRES AND PNEUMATIC TIRE - Provided is a rubber composition for a tire soft stiffener improved in a crack resistance and a low heat generation, wherein carbon black (A) contained in the rubber shows specific particle size distribution behavior in an aggregate mass distribution curve, and the composition contains at least one compound selected from carbon black coupling agents consisting of bismaleimide (B), alkylidene hydrazide (C), disulfane (D) and carboxylic hydrazide (E), and a heavy-duty tire produced by using the above rubber composition is further provide. | 01-21-2016 |
| 20160052350 | AIR MAINTENANCE PUMPING ASSEMBLY AND TIRE - A tire assembly includes a tire having a pneumatic cavity, first and second sidewalls extending respectively from first and second tire bead regions to a tire tread region with the first sidewall having at least one bending region operatively bending when radially within a rolling tire footprint, and a chafer component with an air passageway defined by an air tube resiliently deforming segment by segment between an expanded condition and an at least partially collapsed condition in response to respective segment by segment deformation of the sidewall when radially within the rolling tire footprint. The air tube is inserted into the chafer before assembly with other components of an uncured tire and curing of the uncured tire. | 02-25-2016 |
| 20160068028 | TIRE AND TIRE MANUFACTURING METHOD - A tire is provided suppressing air incorporation and raising durability without a detrimental effect on running performance. The tire | 03-10-2016 |
| 20160075190 | PNEUMATIC TIRE - A pneumatic tire | 03-17-2016 |
| 20220134808 | PNEUMATIC TIRE - Provided is a pneumatic tire with which the same driving safety as prior arts can be ensured and an improvement in fuel efficiency performance and durability performance is achieved. In this pneumatic tire, the tire radial direction outside end section of a chafer is disposed on the tire surface part, the loss tangent tan δ70° C.-SW of a side wall, the loss tangent tan δ70° C.-C of the chafer, complex elastic modulus E*70° C.-SW of the side wall, and the complex elastic modulus E*70° C.-C of the chafer under the condition of 70° C., an elongation of 1%, and a frequency of 10 Hz, and the loss tangent tan δ150° C.-SW of the side wall, and the loss tangent tan δ150° C.-C of the chafer measured under the condition of 150° C., an elongation of 1%, a frequency of 10 Hz satisfy the following expression. tan δ70° C.-SW+tan δ70° C.-C≤0.25|tan δ70° C.-SW−tan δ70° C.-C|≤0.07 E*70° C.-C−E*70° C.-SW≤6.5 MPa tan δ150° C.-SW+tan δ150° C.-C≤0.20 | 05-05-2022 |
