Class / Patent application number | Description | Number of patent applications / Date published |
152209140 | Having tire tread profile defined by diverse radii of curvature | 14 |
20090008011 | Pneumatic Tire - A pneumatic tire having an equatorial plane and a maximum section width is provided. The tire includes a tread portion having outer tread edges that define a tread arc therebetween, a pair of sidewall portions, a pair of bead portions each of which has a bead core, at least one carcass ply extending circumferentially about the tire from one bead portion to the other and wound outwardly about the bead cores to form a pair of turn-up portions that each terminate at a turn-up, and at least one belt provided between the tread portion and the at least one carcass ply. When the tire is inflated to its specified inflated pressure, the tread portion has a profile that includes a central arc, a pair of intermediate arcs each of which intersects opposite edges of the central arc at a first intersection point, and a pair of outer arcs each of which intersects a respective intermediate arc at a second intersection point. The arc length measured from the equatorial plane of the tire to at least one of the first intersection points is between about 20% and about 60% of one half of the tread arc of the tire, while the arc length measured from the equatorial plane of the tire to at least one of the second intersection points is between about 40% and about 80% of one half of the tread arc of the tire. | 01-08-2009 |
20100065174 | PNEUMATIC TIRE - To provide a pneumatic tire achieving improved wear resistance and improved handling performance while maintaining rollover resistance, a tread surface | 03-18-2010 |
20100116390 | DECOUPLING GROOVE FOR PNEUMATIC TIRE TREAD - A pneumatic radial ply truck tire for use on medium truck trailers includes a tread, a casing with two sidewalls, one or more radial plies extending from, and wrapped about, two annular beads, and a belt reinforcement structure located radially between the tread and the one or more radial plies. The tread includes a plurality of circumferentially extending tread grooves, a pair of circumferentially extending shoulder ribs, a pair of radially recessed ribs being radially recessed and non-road contacting under static load disposed at a lateral edge of the shoulder ribs, and a pair of circumferentially extending decoupling grooves. Each decoupling groove defines a transition between a corresponding shoulder rib and a corresponding recessed rib. A lateral edge of one of the shoulder ribs has a first radius of curvature forming a transition from a radially outer surface of the shoulder rib to a first side surface of the corresponding decoupling groove. A base surface of the decoupling groove has a second radius of curvature forming a transition from the first side surface to a second side surface of the decoupling groove. A radially outer surface of the corresponding recessed rib has a third radius of curvature forming a continuous transition from the second side surface to a third outer side surface of the shoulder portion of the tread. | 05-13-2010 |
20100116391 | PNEUMATIC TIRE - The heat resistance of carcass cords is enhanced, whereby the runflat durability is enhanced. A pneumatic tire has a carcass | 05-13-2010 |
20100170600 | Tire with asymmetric tread profile - A tire includes a tread profile and a plurality of ribs extending across the tread profile. Each rib includes a first portion and a second portion on two sides of the center axis of the tread profile. The first portion includes a first section which has a constant height. The length of the first section is “L | 07-08-2010 |
20110030862 | PNEUMATIC TIRE | 02-10-2011 |
20110079334 | TIRE TREAD HAVING IMPROVED CONTACT PRESSURE DISTRIBUTION - A multi-rib tire tread has a plurality of circumferential spaced apart ribs in an axial direction, adjacent ribs separated by a circumferential grooves and each rib having sides extending radially outward to a radially outward contact surface. The outward contact surface of a central rib has an outwardly convex curvature in an axial direction more rounded than a tread curvature. A first lateral rib and a second lateral rib are positioned adjacent opposite sides of the central rib, each lateral rib having an outwardly convex curvature in an axial direction more rounded than a tread curvature. The convex curvature of the first and second lateral ribs are less rounded than the central rib. The radius of curvature of the center rib is within a range of 170 and 270 millimeters; the radius of curvature of the first lateral rib is within a range of 80 to 180 millimeters; and the radius of curvature of the second lateral rib is within a range of 100 to 200 millimeters. | 04-07-2011 |
20110315288 | HEAVY-LOAD RADIAL TIRE - A heavy-load radial tire comprises a tread portion, wherein
| 12-29-2011 |
20120103488 | PNEUMATIC TIRE - An intersection of an extended line of a shoulder side arc and an extended line of a side portion arc is a reference point P, an aspect ratio is β, and an angle θ formed by a straight line A joining the reference point P and a center crown CC and a straight line B in a tire width direction that passes through the center crown CC is configured such that 0.025×β+1.0≦θ≦0.045×β+2.5. A curvature radius Rc of a center portion arc and a curvature radius Rs of the shoulder side arc are configured such that 12≦Rc/Rs≦30. A reference developed width L from a tire equatorial plane CL to an edge of the shoulder side arc on a tire width direction inner side and a developed tread width TDW are configured such that 0.2≦L/(TDW/2)≦0.7. | 05-03-2012 |
20120227881 | PNEUMATIC TIRE - A pneumatic tire is provided with center blocks defined by a central main groove, shoulder main grooves and central axial grooves, and shoulder blocks defined by the shoulder main grooves, shoulder axial grooves and the tread edges. The tread profile comprises a center arc of a radius of 250 to 550 mm and a shoulder arc of a smaller radius and has a camber quantity of 5.5 to 9.0 mm. The center blocks and shoulder blocks are provided with sipes each having an axially outer open end and an axially inner closed end disposed at specific positions in relation to the axially inwardly adjacent main grooves. The total sipe number on the shoulder blocks is more than the total sipe number on the center blocks. | 09-13-2012 |
20140083584 | PNEUMATIC VEHICLE TIRE - A vehicle pneumatic tire has a two-layer belt and a tread having profile grooves within width TW 45. The maximum depth of the profile grooves varies within TW 45 and the tread has an outer contour defined by reference to rolling radius differences. The maximum depth of the grooves within a center region of TW 45 is the same. The maximum depth of the grooves in the shoulder region is a maximum of 2 mm less than in the center region. The outer contour of the tread in the center region is made flat so that the outer contour radius difference (Ard | 03-27-2014 |
20150053319 | TIRE WITH TREAD PROFILE HAVING CONTINUOUS CURVATURE AND METHOD FOR FORMING TIRE - A tire and a method for forming a tire tread are disclosed. The tire includes a tread defining an inferior tread profile and a superior tread profile, the superior tread profile having a generally continuous curvature between an edge of contact and a top center point. The superior tread profile includes a plurality of control points and a plurality of splines. Each of the plurality of splines extends between at least two of the plurality of control points. Curvatures of adjacent splines are generally equal at each of the plurality of control points. | 02-26-2015 |
20150059941 | Pneumatic Tire - A pneumatic tire having a carcass layer mounted between a pair of bead portions includes belts layers disposed on an outer circumferential side of the carcass layer at a tread portion, with at least one circumferential groove is disposed in the tread portion so as to continue in the tire circumferential direction in a region on one side of the tire center line. A distance La from the tire center line to a center position of the outermost circumferential groove has a relationship of 0.50×L≦La≦0.80×L with respect to a tread half-width L from the tire center line to the outer edge position of the tread portion. | 03-05-2015 |
20160052341 | Pneumatic Tire - The present technology pertains to a pneumatic tire ( | 02-25-2016 |