Gwangsan gu, South Korea
Gwangsan gu, South Korea

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Patent
Kumho Tire Co. | Date: 2016-12-22

The present invention provides a pneumatic tire including a tread block 10 having a sipe 100 formed therein. A three-dimensional inclined surface groove 110 is formed at an upper portion of the sipe 100 formed in the tread block 10, such that three-dimensional inclined surface protrusions 16 and inclined surface grooves 17 respectively formed on both sipe side wall surfaces 15 forming the sipe 100 so as to correspond to each other may minimize a movement of the tread blocks 10 due to a stress generated from the tire contacting with a ground during driving, so as to increase a traction force. In addition, a lower through groove is formed at a lower portion of the sipe 100 formed in the tread block 10, such that it is possible to reduce a resonance noise of the tire occurring when driving, more easily and automatically discharge the foreign matters caught in the sipes 100 of the tire during driving, and improve a traction performance of the tire in the latter half of the tire lifespan by dividing the remaining tread block 10 after the upper portion of the tread block 10 is worn.


Patent
Kumho Tire Co. | Date: 2017-07-05

The present invention provides a pneumatic tire including a tread block 10 having a sipe 100 formed therein. A three-dimensional inclined surface groove 110 is formed at an upper portion of the sipe 100 formed in the tread block 10, such that three-dimensional inclined surface protrusions 16 and inclined surface grooves 17 respectively formed on both sipe side wall surfaces 15 forming the sipe 100 so as to correspond to each other may minimize a movement of the tread blocks 10 due to a stress generated from the tire contacting with a ground during driving, so as to increase a traction force. In addition, a lower through groove is formed at a lower portion of the sipe 100 formed in the tread block 10, such that it is possible to reduce a resonance noise of the tire occurring when driving, more easily and automatically discharge the foreign matters caught in the sipes 100 of the tire during driving, and improve a traction performance of the tire in the latter half of the tire lifespan by dividing the remaining tread block 10 after the upper portion of the tread block 10 is worn.


Disclosed are a method for determining pitches of cooling fins (104) for a pneumatic tire so that the heat dissipation performance of the sidewall (102) may be improved and an airflow noise generated by a high speed air may be decreased, and a pneumatic tire (100) including the cooling fins arranged by the same. The method for determining pitches of cooling pins for a pneumatic tire, including: selecting a total number of cooling fins, the number of pitch-types, and a size of each pitch; generating a random number and arranging each type of pitch sequentially by the generated random number to produce a random pitch arrangement; Fourier transforming the obtained pitch arrangement to calculate a result value (FT); and repeatedly performing the steps of producing a random pitch arrangement and calculating the FT to determine a pitch arrangement when a change in amplitude of the FT is smallest, wherein the cooling fin includes a first bar part (110) and a second bar part (106) which are connected with each other at an acute angle, wherein the second bar part is formed to be inclined in the radial direction of the tire, and an end portion of the second bar part is disposed closer to a center of rotation of the tire than an end portion of the first bar part in the radial direction of the tire.


Patent
Kumho Tire Co. | Date: 2016-02-03

The present invention provides a pneumatic tire (100) including a tread portion (110), a cap ply (120), a carcass (130), an apex (150), a bead (140), a side portion (170), and a belt (180) and having asymmetrical structure with respect to a central line C in a width direction. Moreover, the pneumatic tire includes the technical feature that outer diameters of a left side and a right side are equal, while rim diameters (D1,D2) of the left side and the right side are different, and thicknesses (T1,T2) of the left side portion and the right side portion are different.


Patent
Kumho Tire Co. | Date: 2015-07-23

The present invention provides a pneumatic tire including a tread portion, a cap ply, a carcass, an apex, a bead, a side portion, and a belt and having asymmetrical structure with respect to a central line C in a width direction. Moreover, the pneumatic tire includes the technical feature that outer diameters of a left side and a right side are equal, while rim diameters of the left side and the right side are different, and thicknesses of the left side portion and the right side portion are different.


The present disclosure defines a cap play (20) for a pneumatic tire (20) comprising a film layer (201), a coating layer (202) configured to surround an outer surface of the film layer (201) and a rubber topping layer (203) configured to surround an outer surface of the coating layer (202).


Disclosed is a pneumatic radial tire for a passenger car having ultra fine steel cords (100) for a carcass ply in which adhesive force between a carcass ply layer and a side wall or a rim flange rubber adjacent to a turn up portion on an outside and a stiffness of the rim flange rubber are larger than a bending stiffness of the carcass ply layer so as to improve durability of a bead part while reducing poor air inletting generated at a carcass turn up portion.


Patent
Kumho Tire Co. | Date: 2015-10-28

The present invention relates to a cavity noise reduction tire (1) comprising a sound-absorbing insert (5), more particularly to a cavity noise reduction tire (1) having a ratio of the cross-sectional area of the sound-absorbing insert (5) to the cross-sectional area of the space formed by the internal surface of the tire (1) which is to be about 23-29%.


The present disclosure is directed to a cap ply for a pneumatic tire. The cap ply includes a film layer, a coating layer configured to surround an outer surface of the film layer and a rubber topping layer configured to surround an outer surface of the coating layer.


Patent
Kumho Tire Co. | Date: 2015-01-21

A cavity noise reduction tire comprises a tread portion, a bead assembly being disposed at each side of the tread portion, and a sidewall portion for connecting the tread portion and the bead assembly. The tire has a ratio of the cross-sectional area of the sound-absorbing material to the cross-sectional area of the space formed by the internal surface of the tire which is to be about 23-29%.

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