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MarketScreener Homepage  >  Equities  >  Tokyo  >  Sumitomo Rubber Industries Ltd    5110   JP3404200002

SUMITOMO RUBBER INDUSTRIES LTD (5110)
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Sumitomo Rubber Industries : Patent Issued for Pneumatic Tire (USPTO 9764596)

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09/28/2017 | 11:32pm CEST

By a News Reporter-Staff News Editor at Journal of Engineering -- A patent by the inventor Sanae, Ryuhei (Kobe, JP), filed on January 26, 2015, was published online on September 19, 2017, according to news reporting originating from Alexandria, Virginia, by VerticalNews correspondents.

Patent number 9764596 is assigned to SUMITOMO RUBBER INDUSTRIES, LTD. (Kobe-shi, Hyogo, JP).

The following quote was obtained by the news editors from the background information supplied by the inventors: "A pneumatic tire improved in drainage performance by employing straight main grooves has been previously known.

"For example, in the following Patent document 1, in order to improve drainage performance and noise performance, a pneumatic tire provided in the tread portion with three main grooves and narrow grooves disposed in a vehicle-outside land portion has been proposed."

In addition to the background information obtained for this patent, VerticalNews journalists also obtained the inventor's summary information for this patent: "Technical Problem

"The present invention was made with the view to the above-mentioned actual circumstances, and a primary object of the present invention is to provide a pneumatic tire in which steering stability on dry road surfaces and steering stability on wet road surfaces can be achieved in high levels.

"Solution to Problem

"The present invention is a pneumatic tire characterized in that a tread portion is provided with a pair of shoulder main grooves extending continuously in the tire circumferential direction and disposed one on each side of the tire equator in the tire axial direction, and a center main groove extending continuously in the tire circumferential direction and disposed between a pair of the shoulder main grooves so that

"the tread portion is divided into a pair of crown land portions between the center main groove and the shoulder main grooves and a pair of shoulder land portions axially outside the shoulder main grooves,

"the sum of the widths of the shoulder main grooves and the width of the center main groove is 24% to 28% of a tread width,

"in the crown land portions, a groove having a width of not less than 2 mm and extending across the entire width of the crown land portion is not provided, whereas a plurality of crown sipes having a width of less than 2 mm are provided,

"the crown sipes include first sipes having a lateral direction part extending parallel with the tire axial direction and an oblique part inclined with respect to the lateral direction part, and

"the ratio .SIGMA.Ly/.SIGMA.Ls of the sum .SIGMA.Ly of lengths Ly of the lateral direction parts and the sum .SIGMA.Ls of lengths Ls of the crown sipes is not more than 0.15.

"In the pneumatic tire according to the present invention, it is preferable that the shoulder main grooves and the center main groove are straight.

"In the pneumatic tire according to the present invention, it is preferable that the tread portion is provided with an asymmetrical tread pattern such that the tire has side to be faced outward when the tire is installed on a vehicle and accordingly the tread portion has an outside tread edge to be positioned outward and an inside tread edge to be positioned inward,

"a pair of the shoulder main grooves are an outside shoulder main groove on the outside tread edge side and an inside shoulder main groove on the inside tread edge side,

"a pair of the crown land portions are an outside crown land portion between the center main groove and the outside shoulder main groove and an inside crown land portion between the center main groove and the inside shoulder main groove, and

"the inside crown land portion is provided with the first sipes.

"In the pneumatic tire according to the present invention, it is preferable that the width of the outside shoulder main groove is less than the width of the inside shoulder main groove, and less than the width of the center main groove.

"In the pneumatic tire according to the present invention, it is preferable that a pair of the shoulder land portions are an outside shoulder land portion between the outside shoulder main groove and the outside tread edge, and an inside shoulder land portion between the inside shoulder main groove and the inside tread edge, and

"the inside shoulder land portion is provided with inside shoulder axial grooves extending so as to connect between the inside shoulder main groove and the inside tread edge.

"In the pneumatic tire according to the present invention, it is preferable that the outside shoulder land portion is provided with outside shoulder rug grooves extending axially inwardly from the outside tread edge and terminating within the outside shoulder land portion.

"In the pneumatic tire according to the present invention, it is preferable that the crown sipes include second and third sipes disposed in the outside crown land portion,

"the second sipe extends to connect between the center main groove and the inside shoulder main groove, and

"the third sipe extends axially inwardly from the outside shoulder main groove and terminates within the outside crown land portion.

"Advantageous Effects of Invention

"The pneumatic tire according to the present invention is provided in the tread portion with a pair of the shoulder main grooves and the center main groove, and the tread portion is divided into a pair of the shoulder land portions and a pair of the crown land portions. The sum of the widths of the shoulder main grooves and the width of the center main groove is set to be 24% to 28% of the tread width.

"Thereby, the pneumatic tire in this embodiment is provided with sufficient drainage performance and the rigid land portions, and excellent steering stability can be obtained in both of wet and dry road conditions.

"The crown land portions are not provided with a groove having a width of not less than 2 mm and extending across the entire width of the crown land portion, and are provided with a plurality of the crown sipes having the width of less than 2 mm. Thereby, the crown land portions where the ground pressure is high is increased in the rigidity, and excellent steering stability can be obtained on dry road surfaces.

"The crown sipes include the first sipes having the lateral direction part extending parallel with the tire axial direction and the oblique part inclined with respect to the lateral direction part, and the ratio .SIGMA.Ly/.SIGMA.Ls of the sum .SIGMA.Ly of the lengths Ly of the lateral direction parts and the sum .SIGMA.Ls of the lengths Ls of the crown sipes is not more than 0.15.

"Thereby, the percentage of the oblique parts in the crown sipes is increased, the axial rigidity of the crown land portion is increased, and the steering stability on dry road surfaces is improved."

URL and more information on this patent, see: Sanae, Ryuhei. Pneumatic Tire. U.S. Patent Number 9764596, filed January 26, 2015, and published online on September 19, 2017. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=9764596.PN.&OS=PN/9764596RS=PN/9764596

Keywords for this news article include: SUMITOMO RUBBER INDUSTRIES LTD.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2017, NewsRx LLC

(c) 2017 NewsRx LLC, source Science Newsletters

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Financials (JPY)
Sales 2018 901 B
EBIT 2018 -
Net income 2018 44 818 M
Debt 2018 192 B
Yield 2018 3,50%
P/E ratio 2018 9,95
P/E ratio 2019 9,56
EV / Sales 2018 0,72x
EV / Sales 2019 0,68x
Capitalization 453 B
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Number of Analysts 15
Average target price 1 850  JPY
Spread / Average Target 7,4%
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NameTitle
Ikuji Ikeda President & Representative Director
Keizo Kosaka Independent Non-Executive Outside Director
Minoru Nishi Vice President & Representative Director
Yasutaka Ii Director & Senior Managing Executive Officer
Hiroki Ishida Director & Managing Executive Officer
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