摘要:
A tread surface 2 is divided by inner and outer longitudinal grooves 3a and 3b located on opposite sides of the tire equator into a central land portion 4i, intermediate land portions 4m and shoulder land portions 4o. The intermediate land portion 4i includes an inclined grooves 9 having an angle θ with respect to the circumferential direction of the tire, and the angle is increased from an inner end (mi) away from the inner longitudinal grooves 3a by a small distance La to an outer end (mo) where the intermediate land portion intersects with the outer longitudinal grooves 3b. An angle θi in the inner end (mi) is 0 to 25°, and an angle θo in the outer end (mo) is 60 to 80°. A pitch P1 of the inclined grooves 9 in the circumferential direction is greater than a pitch P2 of lug grooves 5 provided in the shoulder land portion 4o in the circumferential direction.
摘要:
A tread surface 2 is divided by inner and outer longitudinal grooves 3a and 3b located on opposite sides of the tire equator into a central land portion 4i, intermediate land portions 4m and shoulder land portions 4o. The intermediate land portion 4i includes an inclined grooves 9 having an angle θ with respect to the circumferential direction of the tire, and the angle is increased from an inner end (mi) away from the inner longitudinal grooves 3a by a small distance La to an outer end (mo) where the intermediate land portion intersects with the outer longitudinal grooves 3b. An angle θi in the inner end (mi) is 0 to 25°, and an angle θo in the outer end (mo) is 60 to 80°. A pitch P1 of the inclined grooves 9 in the circumferential direction is greater than a pitch P2 of lug grooves 5 provided in the shoulder land portion 4o in the circumferential direction.
摘要:
A bead portion of a tire has a short fiber reinforcing rubber layer extending along a side surface of a rubber bead apex from a bead core to a height position which is lower than the radially outer end of the bead apex rubber. The short fiber reinforcing rubber layer has short fibers compounded in an amount of 10 to 30 parts by weight with respect to 100 parts by weight of the rubber, and the short fibers are oriented in the tire circumferential direction.
摘要:
A method and an apparatus for generating gas bubbles, which can generate a large amount of micro gas bubbles having diameters of less than 15 μm, specifically less than 10 μm, in a liquid. The apparatus comprises a tube 2 having a closed end 14 at one end and an open end 15 at the other end, and a rotating bladed wheel 3 installed in the tube 2 and rotating coaxially or substantially coaxially with the tube 2. The rotating bladed wheel 3 has one or more blades 4. The face of each blade 4 is substantially parallel to the axis of a rotating shaft 5 of the rotating bladed wheel 3. Ventilation resistance between the interior of the tube 2 on the side near the closed end 14 and the outside gas is equal to or larger than that of a ventilation port 7 having an inner diameter of 0.36 time an average width d of the blades and a length of 3 mm. At least the open end 15 of the tube 2 and the rotating bladed wheel 3 are immersed in a liquid 20 and the rotating bladed wheel 3 is rotated at a peripheral speed of 5.8 m/sec or higher.
摘要:
A method and an apparatus for generating gas bubbles, which can generate a large amount of micro gas bubbles having diameters of less than 15 μm, specifically less than 10 μm, in a liquid. The apparatus comprises a tube 2 having a closed end 14 at one end and an open end 15 at the other end, and a rotating bladed wheel 3 installed in the tube 2 and rotating coaxially or substantially coaxially with the tube 2. The rotating bladed wheel 3 has one or more blades 4. The face of each blade 4 is substantially parallel to the axis of a rotating shaft 5 of the rotating bladed wheel 3. Ventilation resistance between the interior of the tube 2 on the side near the closed end 14 and the outside gas is equal to or larger than that of a ventilation port 7 having an inner diameter of 0.36 time an average width d of the blades and a length of 3 mm. At least the open end 15 of the tube 2 and the rotating bladed wheel 3 are immersed in a liquid 20 and the rotating bladed wheel 3 is rotated at a peripheral speed of 5.8 m/sec or higher.
摘要:
A tire comprises a sidewall provided with a mark region for displaying at least one mark including at least one of a sold mark and an outline mark, the mark region is provided with serration made up of serration slots and ridges which are drawn up in lines, the mark is formed by discontinuous parts of the serration, wherein the discontinuous parts of the serration are (1) discontinuous parts of serration slots only or (2) discontinuous parts of ridges only or (3) discontinuous parts of serration slots and discontinuous parts of ridges, wherein the discontinuous part of the serration slot is a shallow part formed within the serration slot and having a top face extending across a corresponding part of the mark in substantially parallel with a tire sidewall surface.
摘要:
A reaction vessel including a generally cylindrical center part and two plates or discs which are secured to and close the ends of the center part. The reactant is fed into the interior of the vessel where the polymerization or other chemical reaction takes place. A heat transfer or heat exchanger system is formed by a smooth liner that is mounted coaxially with and within the interior of the center part. The liner is spaced from the center part and it is secured to the center part by a plurality of support portions. The support portions serve both to brace the liner so that it can withstand the pressure of the reactant, and as partitions which form flow paths for a coolant, between the liner and the center part. Further, the liner includes a plurality of strip portions having a width which is substantially equal to the distance between said support portions, said strip portions extending substantially parallel to each other and to said support portions, and said strip portions extending between the radially inner edges of two support portions.
摘要:
A tire noise reducing system comprises a pneumatic tire with a hollow, a wheel rim on which the tire is mounted so that said hollow forms a closed cavity, and a noise damper disposed in the closed cavity, wherein the noise damper is formed by fixing a strip of a porous material to the tire or wheel rim, the noise damper has a volume in a range of from 0.4 to 20 % of the volume of the cavity, the noise damper has a sectional shape substantially constant in the tire circumferential direction, and the pneumatic tire comprises a tread portion provided with tread grooves defining a tread pattern having a sea ratio of 20 to 35 %.