Abstract: [Object] A pneumatic tire that allows reduction of the occurrence of a TGC and, at the same time, allows reduction of rolling resistance, is provided. [Solution] The tire 12 includes a band 26 disposed radially inward of a tread 14, and a belt 24 disposed radially inward of the band 26. The band 26 includes a cord that is helically wound and extends substantially in a circumferential direction. The belt 24 includes an inner layer 24a, and an outer layer 24b that is layered over the inner layer 24a and disposed radially outward of the inner layer 24a. The inner layer 24a and the outer layer 24b each include multiple cords aligned with each other. The cords in the inner layer 24a and the cords in the outer layer 24b are inclined relative to an equator plane. A direction in which the cords in the inner layer 24a are inclined relative to the equator plane is opposite to a direction in which the cords in the outer layer 24b are inclined relative to the equator plane.

Abstract: A pneumatic tire includes a carcass includes at least one carcass ply of cords extending between bead cores of bead portions through a tread portion and sidewall portions, wherein both ends of the carcass ply are turned up around the respective bead cores, and a pair of bead apex rubbers each extending radially outwardly to a radially outer end from a radially inner surface that is connected to the respective bead cores. In a tire meridian cross-section under a standard inflated state, in each of the bead portions, an angle of a bead reference line that passes an axially center point of the inner surface of the bead apex rubber and the radially outer end of the bead apex rubber is in a range of from 28 to 35 degrees with respect to a tire radial line.

Abstract: A pneumatic tire includes a carcass extending between bead cores of bead portions through a tread portion. A tire section width Wt (unit: mm) in relation to a bead diameter Db (unit: inch) satisfies the following equations, Wt??0.7257×(Db)2+42.763×Db?339.67, and Wt??0.7257×(Db)2+48.568×Db?552.33. In a tread thickness distribution curve f(y) represented by equation f(y)=1?t(y)/t(0), when y=0.4, the value of f(y) is of from 0.03 to 0.06, and a rate of change of the value of f(y) increases to y=0.4 and decreases thereafter, where t(y) denotes a tread thickness at each tire axial position Py, and y represents a ratio of an axial distance from the tire equatorial plane, to the maximum-width L of the carcass.

Abstract: A pneumatic tire excellent in resistance to uneven wear, and crack resistance of a groove is provided. A position, on an equator plane, of a tread surface 20 of a tire 2 is represented as a point Pc. A position, at a maximum width, of an axially outer side surface 6a of a sidewall 6 is represented as a point Pe. A position that is a mid-point, in the radial direction, between the point Pc and the point Pe, and that is on the axially outer side surface 6a, is represented as a point Pd. When an internal pressure is enhanced from an internal pressure that is 0.05 times a normal internal pressure P to the normal internal pressure P, a value Fs of difference in amount of protrusion between an amount of protrusion Dd (mm) at the point Pd and an amount of protrusion De (mm) at the point Pe is calculated according to mathematical expression (1) in which a nominal width is represented as W (mm). The value Fs of difference in amount of protrusion is greater than ?0.4 and less than 0.5.

Abstract: [Object] A pneumatic tire 2 that allows achievement of reduction of rolling resistance without taking influence on a mass into consideration, is provided. [Solution] A profile OL of the tire 2 includes a ground-contact surface 46 and a pair of side surfaces 48. In the profile OL, a zone from a point PB to a point PW is formed by three arcs. The arcs are a first arc, a second arc that extends almost outward from the first arc in the radial direction, and a third arc that extends almost outward from the second arc further in the radial direction. A ratio of a radius R2 of curvature of the second arc to a radius R1of curvature of the first arc is greater than or equal to 1.45 and not greater than 3.26. A ratio of a radius R3 of curvature of the third arc to the radius R1 of curvature of the first arc is greater than or equal to 0.45 and not greater than 0.56. Each sidewall 8 of the tire 2 has a first recess 50a and a second recess 50b that are recessed inward from the side surface 48.

Abstract: In a tire 2, a difference Fs (((Dd?De)/W)×100) in an amount of protrusion is greater than ?0.4 and less than 0.5. A sum Fa (((Dd+De)/W)×100) of amounts of protrusions for a sidewall 6 satisfies mathematical expressions (3) and (4) in which an aspect ratio A is used, and a difference Gs (((Da?Dh)/W)×100) in an amount of protrusion for a tread 4 satisfies mathematical expressions (6) and (7). 0.02626×A?1.8615<Fa??(3) Fa<0.02626×A?0.6615??(4) ?0.010819×A?0.084658<Gs??(6) Gs<?0.010819×A+0.

Abstract: In an internal pressure state where an internal pressure that is 0.05 times a normal internal pressure P has been increased to the normal internal pressure P, amounts of protrusions at points Pa, Ph, Pd, and Pe are represented as Da (mm), Dh (mm), Dd (mm), and De (mm), respectively. A sum Fa (((Dd+De)/W)×100) of the amounts of protrusions for each sidewall 6 satisfies mathematical expressions (2) and (3) in which an aspect ratio A is used, and a difference Gs (((Da?Dh)/W)×100) in the amount of protrusion for a tread 4 satisfies mathematical expressions (5) and (6). 0.02626×A?1.8615<Fa??(2) Fa<0.02626×A?0.6615??(3) ?0.010819×A?0.084658<Gs??(5) Gs<?0.010819×A+0.6713??(6).

Abstract: A non-pneumatic tire has high durability performance. A non-pneumatic tire is provided with: an annular tread section (2) which comes into contact with the road surface; an annular inner peripheral section (3) which is located on the inside of the tread section (2) in the radial direction of the tire; and a plurality of connection sections (4) which connect the tread section (2) and the inner peripheral section (3). The connection sections (4), the inner surface (2b) of the tread section (2), and/or the outer surface (3a) of the inner peripheral section (3) is provided with a plurality of dimples (5).

Abstract: A pneumatic tire 1 includes: a tread 2; sidewalls 3; a carcass 5; and a belt 6. A distribution of a thickness Tg(y) of the tread in a region extending in an axially outward direction of the tire, is represented by equation Tg(y)=A?a×Ct(y). A represents a thickness of the tread at a crown center 17. Ct(y) represents a distribution of a displacement of the tread surface in a radially inward direction of the tire , in a region from the crown center to an end portion of the belt. a represents a coefficient selected from a range of values that are greater than or equal to 0.10, and are not greater than 0.35. A displacement Cc(y) of the carcass 5 in the radially inward direction of the tire, in a region extending in the axially outward direction of the tire from the crown center, is represented by equation Cc(y)=(1?a)×Ct(y).

Abstract: When a pneumatic tire is in a reference state of being fitted with a rim that is one inch larger than a regular rim in width, of holding 15 kPa internal pressure, and of being under no load, then a tread thickness distribution curve represented by f(y)=1?t(y)/t(0) is 0.01 to 0.03 when y=0.3; 0.03 to 0.06 when y=0.4; and 0.06 to 0.10 when y=0.5, where y denotes a ratio of a distance in an axial direction from an equator surface relative to a distance L in the axial direction between the equator surface and a maximum width position of a carcass, and t(y) denotes a tread thickness corresponding to a distance in a radial direction between an outer surface of the carcass and an outer surface of a tread at an axial direction position corresponding to y.

Abstract: [Object] A pneumatic tire that allows reduction of the occurrence of a TGC and, at the same time, allows reduction of rolling resistance, is provided. [Solution] The tire 12 includes a band 26 disposed radially inward of a tread 14, and a belt 24 disposed radially inward of the band 26. The band 26 includes a cord that is helically wound and extends substantially in a circumferential direction. The belt 24 includes an inner layer 24a, and an outer layer 24b that is layered over the inner layer 24a and disposed radially outward of the inner layer 24a. The inner layer 24a and the outer layer 24b each include multiple cords aligned with each other. The cords in the inner layer 24a and the cords in the outer layer 24b are inclined relative to an equator plane. A direction in which the cords in the inner layer 24a are inclined relative to the equator plane is opposite to a direction in which the cords in the outer layer 24b are inclined relative to the equator plane.

Abstract: [Object] A pneumatic tire 2 that allows achievement of reduction of rolling resistance without taking influence on a mass into consideration, is provided. [Solution] A profile OL of the tire 2 includes a ground-contact surface 46 and a pair of side surfaces 48. In the profile OL, a zone from a point PB to a point PW is formed by three arcs. The arcs are a first arc, a second arc that extends almost outward from the first arc in the radial direction, and a third arc that extends almost outward from the second arc further in the radial direction. A ratio of a radius R2 of curvature of the second arc to a radius R1 of curvature of the first arc is greater than or equal to 1.45 and not greater than 3.26. A ratio of a radius R3 of curvature of the third arc to the radius R1 of curvature of the first arc is greater than or equal to 0.45 and not greater than 0.56. Each sidewall 8 of the tire 2 has a first recess 50a and a second recess 50b that are recessed inward from the side surface 48.

Abstract: To improve the rolling resistance and air resistance of a tire. It has a belt layer composed of two belt plies in which belt cords are obliquely arranged at mutually opposite angles ? with respect to the tire equator, and a band layer composed of a single band ply in which a band cord is wound spirally in the tire circumferential direction. The angle ? of the belt cords is in a range of 35 degrees˜55 degrees. When Wt is the tire cross sectional width (unit: mm), and Db is a bead diameter (unit: inch), the tire cross sectional width Wt satisfies the following expressions (1), (2). Wt=<?0.7257×(Db)?2+42.763×Db?339.67??(1) Wt>=?0.7257×(Db)?2+48.568×Db?552.

Abstract: This pneumatic tire improves fuel efficiency (i.e., rolling resistance and air resistance) while maintaining wear resistance in shoulder sections. If a tire cross-section width is denoted as Wt (unit: millimeters) and a bead diameter is denoted as Db (unit: inches), the following equations (1) and (2) are satisfied. (1) Wt??0.7257×(Db)2+42.763×Db?339.67, (2) Wt??0.7257×(Db)2+48,568×Db?552.33 Furthermore, if positions in the tire axis direction are denoted as Py, wherein y represents the ratio between the distance in the tire axis direction from the tire center and a distance L in the tire axis direction from the tire center to the maximum width position on the carcass, and the tread thickness, which is the distance in the tire radial direction from the outer surface of the carcass to the outer surface of a tread section at each position Py in the tire axis direction, is denoted as t(y), in the tread thickness distribution curve f(y) represented by equation (3) below, when y=0.4, f(y) ranges from 0.03 to 0.

Abstract: A non-pneumatic tire has high durability performance. A non-pneumatic tire is provided with: an annular tread section (2) which comes into contact with the road surface; an annular inner peripheral section (3) which is located on the inside of the tread section (2) in the radial direction of the tire; and a plurality of connection sections (4) which connect the tread section (2) and the inner peripheral section (3). The connection sections (4), the inner surface (2b) of the tread section (2), and/or the outer surface (3a) of the inner peripheral section (3) is provided with a plurality of dimples (5).

Abstract: In a tire 2, a difference Fs (((Dd?De)/W)×100) in an amount of protrusion is greater than ?0.4 and less than 0.5. A sum Fa (((Dd+De)/W)×100) of amounts of protrusions for a sidewall 6 satisfies mathematical expressions (3) and (4) in which an aspect ratio A is used, and a difference Gs (((Da?Dh)/W)×100) in an amount of protrusion for a tread 4 satisfies mathematical expressions (6) and (7). 0.02626×A?1.8615<Fa??(3) Fa<0.02626×A?0.6615??(4) ?0.010819×A?0.084658<Gs??(6) Gs<?0.010819×A+0.

Abstract: In an internal pressure state where an internal pressure that is 0.05 times a normal internal pressure P has been increased to the normal internal pressure P, amounts of protrusions at points Pa, Ph, Pd, and Pe are represented as Da (mm), Dh (mm), Dd (mm), and De (mm), respectively. A sum Fa (((Dd+De)/W)×100) of the amounts of protrusions for each sidewall 6 satisfies mathematical expressions (2) and (3) in which an aspect ratio A is used, and a difference Gs (((Da?Dh)/W)×100) in the amount of protrusion for a tread 4 satisfies mathematical expressions (5) and (6). 0.02626×A?1.8615<Fa ??(2) Fa<0.02626×A?0.6615 ??(3) ?0.010819×A?0.084658<Gs ??(5) Gs<?0.010819×A+0.

Abstract: A pneumatic tire excellent in resistance to uneven wear, and crack resistance of a groove is provided. A position, on an equator plane, of a tread surface 20 of a tire 2 is represented as a point Pc. A position, at a maximum width, of an axially outer side surface 6a of a sidewall 6 is represented as a point Pe. A position that is a mid-point, in the radial direction, between the point Pc and the point Pe, and that is on the axially outer side surface 6a, is represented as a point Pd. When an internal pressure is enhanced from an Internal pressure that is 0.05 times a normal internal pressure P to the normal internal pressure P, a value Fs of difference in amount of protrusion between an amount of protrusion Dd (mm) at the point Pd and an amount of protrusion De (mm) at the point Pe is calculated according to mathematical expression (1) in which a nominal width is represented as W (mm). The value Fs of difference in amount of protrusion is greater than ?0.4 and less than 0.5.

Abstract: When a pneumatic tire is in a reference state of being fitted with a rim that is one inch larger than a regular rim in width, of holding 15 kPa internal pressure, and of being under no load, then a tread thickness distribution curve represented by f(y)=1?t(y)/t(0) is 0.01 to 0.03 when y=0.3; 0.03 to 0.06 when y=0.4; and 0.06 to 0.10 when y=0.5, where y denotes a ratio of a distance in an axial direction from an equator surface relative to a distance L in the axial direction between the equator surface and a maximum width position of a carcass, and t(y) denotes a tread thickness corresponding to a distance in a radial direction between an outer surface of the carcass and an outer surface of a tread at an axial direction position corresponding to y.

Abstract: A head maintenance device includes a wiping section which wipes a nozzle plane, on which a plurality of nozzles to eject ink are provided, of an inkjet head. The wiping section includes a wiping member including a cloth, an elastic body and a support, in the order named from a side where the wiping section comes into contact with the inkjet head. The cloth is moved parallel to the nozzle plane at a relative moving velocity of not less than RMV×0.2 and not more than RMV×0.9 with respect to the nozzle plane so as to wipe the nozzle plane.