Class / Patent application number | Description | Number of patent applications / Date published |
152209240 | Having angle of inclination of one wall different from that of opposite wall | 34 |
20080196808 | Studless tire - A studless tire capable of suppressing a vehicle from staggering at the time of braking on icy and snow-covered roads, including a tread portion | 08-21-2008 |
20080210356 | Pneumatic tire - The tread of a pneumatic tire has a plurality of tread elements separated by at least one groove, the tread elements having a depth as determined from an initial tread surface and the base of the at least one groove. The tread has at least one chamfer. The chamfer is divided into at least two inclined adjacent portions with the inclined adjacent portions being inclined at different inclination angles relative to the tread surface. The difference in inclination angles of the different portions is at least 100. The inclined adjacent portions are both connected to an inclined common area, the inclined common area being adjacent to the initial tread surface. | 09-04-2008 |
20080289738 | Pnuematic Tire - An object of the present invention is to provide a pneumatic tire which prevents one-sided biased abrasion from being generated. A pneumatic tire according to the present invention has a non-directed rotational direction and comprises rug grooves | 11-27-2008 |
20090000713 | TIRE INCLUDING SEGMENTED SIPES - A tire having a circumferential tread with segmented sipes is provided. In one embodiment, the tire has tread blocks with sipes having at least three segments. The sipe may include a first major segment, a second major segment, and a minor segment connected to both the first major segment and the second major segment. In alternative embodiments, the sipe may include three or more major segments, connected by a plurality of minor segments. | 01-01-2009 |
20090194213 | PNEUMATIC TIRE - A pneumatic tire includes on a tread a plurality of circumferential main grooves extending in the tire circumferential direction, and a plurality of land portions formed by being partitioned by the circumferential main grooves. A protrusion is formed on a groove bottom of at least one of the circumferential main grooves. The protrusion continuously extends in a groove-length direction of the circumferential main groove, and a height h | 08-06-2009 |
20100212796 | PNEUMATIC TIRE - A pneumatic tire ( | 08-26-2010 |
20100326577 | PNEUMATIC TIRE - Steering stability and drainage property are improved in good balance. A center land portion | 12-30-2010 |
20110017375 | PNEUMATIC RADIAL TIRE FOR HEAVY LOAD - The present invention provides a pneumatic radial tire for heavy load, having lug grooves in respective side regions of a tread surface, in which tire an amount of slip of the trailing edge of each of land portions defined by the lug grooves, with respect to a road surface, when the tire is rotated with load applied thereon is advantageously reduced without causing decrease in partial wear resistance of the land portions at a road contact surface thereof and generating cracks at the lug groove bottom. The pneumatic radial tire for heavy load, having a plurality of lug grooves | 01-27-2011 |
20110100521 | PNEUMATIC TIRE - There is provided a pneumatic tire capable of reducing rolling resistance and suppressing river wear of uneven wear. | 05-05-2011 |
20110155293 | Directional Tire Tread with Modified Incisions - Directional tire tread having a rolling surface, this tread being provided with a plurality of incisions bounded by mutually opposing walls, each of said walls entering the rolling surface in such a way as to form an edge called the leading edge of an element of material, corresponding to the edge that enters the contact patch first, and an edge called the trailing edge of the same element of material, corresponding to the edge that enters the contact patch after the leading edge, each incision comprising at least one segment bounded by mutually opposing walls that make, with a direction perpendicular to the rolling surface passing through the intersection of the incision with the rolling surface, a negative average angle α whose absolute value is less than 55°, this tread being characterized in that this segment of negative angle α exits the rolling surface via an enlarged end portion bounded by mutually opposing first and second faces, the angles of the first face and second face being positive and not equal to each other. | 06-30-2011 |
20110192516 | TIRE - The present invention provides a tire in which generation of partial wear and groove cracks are suppressed. Specifically, the present invention provides a tire having in a tread surface thereof plural circumferential grooves extending in the tire circumferential direction, characterized in that: each of respective circumferential grooves disposed on the outermost side in the tire widthwise direction is designed to have a section in the tire widthwise direction, in which an angle formed by a groove wall on the outer side in the tire widthwise direction, with respect to a straight line tangent to a tread contour at the opening edge on the outer side in the tire widthwise direction of said groove, is larger than an angle formed by a groove wall on the tire equatorial side in the tire widthwise direction, with respect to a straight line tangent to a tread contour at the opening edge on the tire equatorial side in the tire widthwise direction of said groove; and each of said angles is in the range of 90° to 100° (inclusive of 90° and exclusive of 100°). | 08-11-2011 |
20110203709 | PNEUMATIC VEHICLE TIRE - A pneumatic vehicle tire includes a tread rubber that is divided into tread elements, such as tread bars or circumferential ribs, by circumferential grooves and transverse grooves. A groove flank of a circumferential groove facing away from an outer shoulder runs at a first angle of inclination relative to the radial direction, and a groove flank opposite the groove flank facing away from the outer shoulder includes two flank portions respectively running at a second angle of inclination and a third angle of inclination relative to the radial direction. The radially inner flank portion has elevations that form a ribbed structure. | 08-25-2011 |
20110232816 | TIRE TREAD - A pneumatic tire is disclosed having circumferential grooves having an asymmetrical cross-sectional shape. The circumferential grooves may also be located asymmetrically on the outer tread surface. | 09-29-2011 |
20120267021 | TIRE WITH A LATERAL GROOVE HAVING A CHAMFER FOR IMPROVED SNOW PERFORMANCE - A tire with improved snow performance and dry braking performance is provided that has at least one lateral groove with a chamfer found where the groove intersects the circumference of the tire. In some cases, a second chamfer is found opposite first chamfer on the groove. In most cases, a plurality of similarly configured lateral grooves with chamfers is found along the circumference of the tire. Typically, the width of the lateral groove is approximately 2 to 4 mm, and preferably between 2.6 and 3.6 mm. Also the angle the chamfer forms with the tangent of the circumference of the tire may be approximately 45 degrees. The angle the sweep path of the lateral groove forms with the lateral direction of the tire ranges from approximately 0 to 45 degrees. | 10-25-2012 |
20130000806 | TIRE - A land portion of a pneumatic tire | 01-03-2013 |
20130139939 | METHOD OF DESIGNING A TIRE, AND TIRE - Method of designing a tire for the steered axle of a heavy goods vehicle, having a nominal sidewall height F, having a tread in the new state having a maximum total width Lo for maximum contact with the ground and provided with at least four circumferential grooves each extending between the tread surface and a groove bottom, these grooves delimiting three intermediate ribs and two edge ribs axially bounding the tread, each edge rib having two lateral walls, one of which, known as the internal lateral wall, having a height PREp measured with respect to the bottom of the groove delimiting the edge rib, this internal lateral wall having, when viewed in section on a plane containing the axis of rotation, an inclination DEp, each edge rib having a width LEp greater than the width of each of the intermediate ribs, by iteratively determining values for the dimensions LEp, PREp and DEp that satisfy the following relationship:
| 06-06-2013 |
20140000775 | PNEUMATIC TIRE | 01-02-2014 |
20140020804 | TIRE | 01-23-2014 |
20140048191 | TREAD BAND WITH ASYMMETRIC GROOVES TO REDUCE DEBRIS RETENTION - A tread band having at least one longitudinal groove bounded by a bottom wall, and by two sidewalls; each sidewall of the longitudinal groove has a continuous sequence of alternating projections and recesses, which extend crosswise so that, in plan view, the first longitudinal groove is zigzag shaped; each projection of one sidewall of the longitudinal groove always faces a recess in the other sidewall of the longitudinal groove; and, at all the projections, an outer portion of each sidewall slopes at a first obtuse angle to the bottom wall, and, at all the recesses, an outer portion of each sidewall slopes at a second obtuse angle, different from the first obtuse angle, to the bottom wall. | 02-20-2014 |
20140130952 | PNEUMATIC TIRE - A pneumatic tire comprises a tread portion | 05-15-2014 |
20140311642 | Pneumatic Tire - The pneumatic tire includes a belt layer having a circumferential reinforcing layer. Additionally, the pneumatic tire includes a plurality of circumferential main grooves, and a plurality of land portions partitioned by the circumferential main grooves in a tread portion. The width W | 10-23-2014 |
20150020940 | PNEUMATIC TIRE - A pneumatic tire includes a tread surface which is sectioned into a center area, a mediate area arranged in an outer side of the center area, and a shoulder area arranged in an outer side of the mediate area, wherein inclined grooves are formed spaced apart in a tire circumferential direction, the inclined grooves continuously extending from the mediate area to the shoulder area, in blocks in the mediate area and the shoulder area sectioned by the inclined grooves, an angle of inclination of a side wall on a leading side with respect to a normal direction of the tread surface is greater than an angle of inclination of a side wall on a trailing side with respect to a normal direction of the tread surface, and a plurality of dimples are formed in the side wall on the leading side of the block in the mediate area. | 01-22-2015 |
20150041034 | Pneumatic Tire - In a pneumatic tire, land portions have a plurality of sipes and at least one row of land portions in an inner side region is provided with sipes having a 3D structure. Also, the snow traction index (STI) with respect to the tire circumferential direction throughout the entire tread portion is in the range of 100≦STI. Also, the sipe component (STI_s_out) of the snow traction index (STI) in an outer side region and the sipe component (STI_s_in) of the snow traction index (STI) in the inner side region have the relationship of 1.1≦STI_s_in/STI_s_out. Also, the peripheral length ratio PLR_out of the three-dimensional structure portion in the outer side region and the peripheral length ratio PLR_in of the three-dimensional structure portion in the inner side region have the relationship of 1.1≦PLR_in/PLR_out. | 02-12-2015 |
20150336430 | PNEUMATIC TIRE - A pneumatic tire includes a tread portion provided with a pair of central blocks arranged on both sides of a tire equator. Each of the central blocks includes a ground contacting face having an axially inner block edge facing the tire equator. The inner block edge extends in a V-shaped manner including a first inclined edge and a second inclined edge inclined in an opposite direction to the first inclined edge. The second inclined edge has a circumferential length shorter than a circumferential length of the first inclined edge. Each of the central blocks includes a first portion having the first inclined edge and a second portion having the second inclined edge. The second portion of the central block includes an end wall at an opposite side to the first portion. The end wall includes a stepwise wall extending in steps toward a groove bottom. | 11-26-2015 |
20150336431 | PNEUMATIC TIRE TREAD AND PNEUMATIC TIRE HAVING SAID TREAD - A pneumatic tire tread in which a reinforcing part is provided on frontal side walls of a block of a tire tread in order to improve the performance on snow and the performance on ice, and a pneumatic tire having such a tread, wherein angles T | 11-26-2015 |
20160009145 | IMPROVED CIVIL ENGINEERING TIRE TREAD | 01-14-2016 |
20160075187 | TIRE FOR TWO-WHEELED MOTOR VEHICLE - A tire center slant groove near tread surface tire equatorial plane extends toward reverse rotation-direction of designated rotation-direction while slanting from a tire equatorial plane side to a tire-width direction outer side, an extension direction angle forms with respect to a tire circumference-direction within range, 3°-10°; and at center slant groove-end portion in reverse rotation-direction, at least a tire-width direction outer side groove-edge of the center slant groove forms into a circular-arc-shaped portion to have the tire-width direction outer side groove-edge angle formed with respect to tire circumference-direction, the angle increasing toward reverse rotation-direction, the tire-width direction outer side groove-edge angle of the center slant groove forms with respect to tire circumference-direction larger than an angle of a tire-width direction inner side groove-edge of the center slant groove forms with respect to tire circumference-direction, and the center slant groove depth gradually decreases toward the center slant groove-edge in reverse rotation-direction. | 03-17-2016 |
20160121659 | PNEUMATIC TIRE - A pneumatic tire includes a tread portion provided with a circumferentially and continuously extending zigzag shoulder main groove located adjacent to a tread edge to define a shoulder portion axially outward of the shoulder main groove and a central lateral groove extending axially inwardly from the shoulder main groove. The shoulder portion includes a top surface having an axially inner edge facing the shoulder main groove and a sidewall extending radially inwardly from the inner edge. The sidewall of the shoulder portion is provided with a shoulder dent portion dented axially outwardly from the shoulder main groove. The central lateral groove is located so that an extended portion in which the central lateral groove is extended axially outwardly overlaps with the shoulder dent portion at least partially. | 05-05-2016 |
20160137006 | TIRE - A tire includes a plurality of land portions defined by a plurality of circumferential grooves, and each of the plurality of land portions has a plurality of lateral grooves crossing the land portion. Each of the plurality of lateral grooves is made up of a center region extending at an angle of inclination relative to a tread width direction and side regions extending at a smaller angle of inclination relative to the tread width direction than the center region, the side regions increasing in groove width toward the respective circumferential grooves. Each of the plurality of lateral grooves has a sipe having, only in the center region, a shallow portion with a smaller depth, the shallow portion being located at least near a boundary part between the center region and each of the side regions with a starting point of the shallow portion being apart from the boundary part. | 05-19-2016 |
20160144666 | PNEUMATIC TIRE - This pneumatic tire is provided with a center land section demarcated between a pair of center primary grooves extending in a zig-zag shape at a tread section. The center land section is provided with: one center narrow groove extending contiguously in a zig-zag manner in the peripheral direction of the tire at the tire equator; and a plurality of center lug grooves that traverse the center narrow groove from the center primary groove and have a terminus positioned within the center land section. The center lug grooves have: a primary groove section extending from the center primary groove to an apex of the zig-zag of the center narrow groove, and is inclined to one side with respect to the axial direction of the tire; and a sub-groove section extending from an apex of the zig-zag to the terminus and inclined in the reverse direction from the primary groove section. | 05-26-2016 |
20160152090 | PNEUMATIC TIRE | 06-02-2016 |
20160152094 | HEAVY-DUTY TIRE | 06-02-2016 |
20160185160 | PNEUMATIC TIRE - A pneumatic tire includes a tread having a shoulder main groove, a center main groove formed adjacent to the shoulder main groove, a shoulder land section on tire axially outer side of the shoulder main groove, and a middle land section bordered by the shoulder and center main grooves. The shoulder land section has a shoulder lug groove and a shoulder linked sipe connecting the end of the shoulder lug groove and the shoulder main groove, the middle land section has a middle lug groove and a middle linked sipe connecting the end of the middle lug groove and the center main groove, and the shoulder lug groove, the shoulder linked sipe and the middle lug groove are formed on an inclined curve extending smoothly from the tread edge in the axially inward direction, and the middle linked sipe is inclining in direction opposite with respect to the inclined curve. | 06-30-2016 |
20160193886 | PNEUMATIC TIRE | 07-07-2016 |