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Patent
Sumitomo Rubber Industries Ltd. | Date: 2016-06-29

[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.


Patent
Sumitomo Rubber Industries Ltd. | Date: 2016-01-06

A medical tube is provided, which has a detachment preventing function and provides a joint structure at lower costs without forming a step on an inner surface of the joint structure. The medical tube (1) is made of a chemical-resistant material, and includes a tube body (2) having a predetermined inner diameter (F) and a predetermined outer diameter (G), and an annular joint (3) provided at one end of the tube body (2) with respect to a longitudinal direction (X) of the tube body (2) integrally with the tube body (2), the annular joint (3) projecting outward from an outer peripheral surface (5) of the tube body (2) at an angle (D) smaller than a right angle, the annular joint (3) having a diameter progressively decreasing in a direction from a projection edge (8) toward the one end of the tube body (2).


Patent
Sumitomo Rubber Industries Ltd. | Date: 2016-11-23

The valve device 1 has a valve main body 2 defining a valve chest 21 provided with a NO outlet port 25 and a NC outlet port 24 through which a fluid flows, and a valve 3 for opening/closing the NC outlet port 24 and NO outlet port 25. The valve 3 includes a diaphragm 6 disposed so as to cover the valve chest 21, and a drive means 4 for pressing the diaphragm 6 to open/close the NC outlet port 24 and NO outlet port 25. The first valve seat 24b and the second valve seat 25b are formed around the NC outlet port 24 and NO outlet port 25. The diaphragm 6 is made of an elastic material of which JIS-K6253 durometer A hardness is A50-A85. The pressure of the diaphragm 6 seated on the first valve seat 24b and the second valve seat 25b is 0.5-1.0 N/sq.mm.


Patent
SUMITOMO RUBBER INDUSTRIES Ltd | Date: 2016-05-04

A pneumatic tire (1) comprises a tread portion (2) having an inboard tread edge (Tel) to be positioned towards the center of a vehicle body, and an outboard tread edge (Te2) to be positioned away from the center of the vehicle body. The tread portion (2) is provided with an inboard shoulder main groove (3A), an outboard shoulder main groove (3B) and a center main groove (4) to define an inboard shoulder land region (8A) and an inboard middle land region (7A). The width W1 of the inboard shoulder main groove (3A) is more than the width W2 of the outboard shoulder main groove (3B) and in a range of from 9.0 % to 10.0 % of the tread width (TW). The ratio W4/W3 of the width W4 of the inboard shoulder land region (8A) to the width W3 of the inboard middle land region (7A) is in a range of from 1.3 to 1.4. The inboard shoulder land region (8A) is provided with shoulder lateral grooves (10) extending axially inwardly from the inboard tread edge (Tel) to terminate within the inboard shoulder land region (8A). The ratio W5/P1 of the width w5 of the shoulder lateral grooves (10) to an arrangement pitch P1 of the shoulder lateral grooves (10) is in a range of from 0.18 to 0.25.


Patent
Sumitomo Rubber Industries Ltd. | Date: 2016-03-23

The present invention provides methods of modifying the surfaces of a plurality of three-dimensional objects at the same time to provide good sliding properties, good durability after repeated sliding, good sealing properties, and the like, and also provides gaskets for syringes obtained by such methods. The present invention relates to a method for modifying the surfaces of a plurality of three-dimensional objects including: a step 1 of immersing a plurality of three-dimensional objects in a photopolymerizable monomer-containing liquid; and a step 2 of polymerizing the photopolymerizable monomer by photoirradiation while rotating a vessel containing the plurality of three-dimensional objects and the photopolymerizable monomer-containing liquid, to grow polymer chains on the surfaces of the plurality of three-dimensional objects.


Patent
Sumitomo Rubber Industries Ltd. | Date: 2016-10-12

Performance on snowy roads is improved. Provided is a pneumatic tire, of which the mounting orientation on a vehicle is indicated. An outer middle land part is formed between a first major groove and a second major groove. The first major groove has first portions and second portions alternately formed in the tire circumferential direction, the second portions being wider than the first portions. The outer middle land part is provided with a plurality of middle inclined grooves not directly interconnected with either the first major groove or the second major groove, a plurality of outer middle lug grooves connecting the second portions of the first major groove and the middle inclined grooves, and inner middle lug grooves connecting the middle inclined grooves and the second major groove. The outer middle lug grooves are provided to different positions in the tire circumferential direction than the inner middle lug grooves.


Patent
SUMITOMO RUBBER INDUSTRIES Ltd | Date: 2016-11-30

A winter tire includes a tread portion provided with first inclined main grooves extending from a first tread edge near a tire equator, second inclined main grooves extending from a second tread edge near the tire equator, a first inner longitudinal groove connecting a pair of first inclined main grooves at the vicinity of the tire equator and a second inner longitudinal groove connecting a pair of second inclined main grooves at the vicinity of the tire equator. Each of the first inclined main grooves includes an axially first inner end portion extending along an axial direction of the tire to the second inner longitudinal groove, and each of the second inclined main grooves includes an axially second inner end portion extending along the axial direction of the tire to the first inner longitudinal groove.


Patent
Sumitomo Rubber Industries Ltd. | Date: 2016-05-24

An object of the present invention is to provide a tire vulcanization method in which there is no air remained between a vulcanization mold and an unvulcanized tire in tire vulcanization, the unvulcanized tire easily fits the vulcanization mold and an occurrence of bareness is prevented. The present invention relates to a tire vulcanization process comprising an application process of applying a coating agent comprising powder on a surface of an unvulcanized tire and a vulcanization process of vulcanizing the unvulcanized tire obtained in the application process, a tire production method comprising the vulcanization method, and a tire produced by the tire production method.


Patent
Sumitomo Rubber Industries Ltd. | Date: 2016-07-20

The present invention provides a pneumatic tire having high productivity and achieving a balanced improvement in fuel economy, rubber strength, abrasion resistance, wet-grip performance, and handling stability. The present invention relates to a pneumatic tire including a tread formed from a rubber composition, the rubber composition containing a rubber component in which, based on 100% by mass of the rubber component, the amount of a styrene-butadiene rubber is 15-90% by mass, the amount of a high-cis polybutadiene having a cis content of 95% by mass or more is 5-60% by mass, and the amount of a polyisoprene-based rubber is 0-70% by mass, the rubber composition containing, relative to 100 parts by mass of the rubber component, 10-150 parts by mass of a silica having a nitrogen adsorption specific surface area of 40-400 m^(2)/g, and 1-50 parts by mass of a farnesene resin obtained by polymerizing farnesene.


Patent
Sumitomo Rubber Industries Ltd. | Date: 2016-06-08

A pneumatic tire is provided with a pair of shoulder lands (20), and each of the shoulder lands (20) has arranged therein shoulder lug grooves (23) and first sipes (25). The opposite ends of each of the first sipes (25) terminate within a shoulder land (20), and the outer end (25o) of the first sipe (25) in the axial direction of the tire is located on the inside of a ground contact end of the tread in the width direction of the tire. The sum (Lai) of the lengths (Lai) of the first sipes (25a) provided in the shoulder land (22) located facing the inside of a vehicle when the tire is mounted on the vehicle is greater than the sum (Lao) of the lengths (Lao) of the first sipes (25b) provided in the shoulder land (21) located facing the outside of the vehicle. The shoulder land (22) located facing the inside of the vehicle is provided with second sipes (26) extending in the circumferential direction of the tire on the inside of the first sipes (25) in the axial direction of the tire.

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