Abstract:
Disclosed is a vulcanizing method of a pneumatic bias tire having an aspect ratio Y of 25% or more and 55% or less from an unvulcanized tire, which comprises the step of expanding a rubber-made bladder from an inside of the unvulcanized tire in metallic molds, in which a bladder stretch ratio X of an outer diameter of the bladder when it is not expanded relative to a tire inner surface diameter, when the unvulcanized tire is pressed to the inner surfaces of the metallic molds by means of expansion of the bladder, is set in a range expressed by the following expression: X=&bgr;−Y/&agr;, where 0.37
Abstract:
A pneumatic tire as a slick tire comprising at least one wear indication hole within a contact width of a tread portion, wherein a distance from a shoulder contact end to the wear indication hole is set equal to 35 mm or lower; and a projected line is provided in a surface of the tread portion, the projected line having a height set in a range of 0.1 to 1.0 mm, and being extended from a position in contact with the wear indication hole to a shoulder side. Also, a metallic mold used for building the slick tire.
Abstract:
A pneumatic tire having shoulder blocks defined on a shoulder side of the tread surface by lateral grooves extending in the widthwise direction of the tire beyond a ground contact end of the tire, the shoulder blocks being arranged in the circumferential direction of the tire. A bottom-raising portion is provided only on a bottom of every other lateral groove of the lateral grooves. Two shoulder blocks adjacent in the circumferential direction of the tire are connected by the first bottom-raising portion.
Abstract:
A pneumatic tire having shoulder blocks defined on a shoulder side of the tread surface by lateral grooves extending in the widthwise direction of the tire beyond a ground contact end of the tire, the shoulder blocks being arranged in the circumferential direction of the tire. A bottom-raising portion is provided only on a bottom of every other lateral groove of the lateral grooves. Two shoulder blocks adjacent in the circumferential direction of the tire are connected by the first bottom-raising portion.
Abstract:
A pneumatic tire having a rotation direction specified in one direction. The tread surface has a main groove extending on the equatorial plane of the tire, right and left first inclination grooves extending in an inclined manner from the main groove toward the reverse rotation direction of the tire, and right and left second inclination grooves disposed on the opposite sides of the main groove. The right and left second inclination grooves are disposed at symmetrical positions with respect to the equatorial plane of the tire. Blocks are formed on the opposite sides of the main groove by the main groove, right and left first inclination grooves and right and left second inclination grooves. The blocks include right and left first blocks defined by tire rotation direction side portions of the second inclination grooves, main groove and first inclination grooves, and right and left second blocks defined by tire reverse rotation direction side portions of the second inclination grooves, main groove and first inclination grooves. First main groove portions between the right and left first blocks are less in width than second main groove portions between the right and left second blocks.
Abstract:
A pneumatic tire having a rotation direction specified in one direction. The tread surface has a main groove extending on the equatorial plane of the tire, right and left first inclination grooves extending in an inclined manner from the main groove toward the reverse rotation direction of the tire, and right and left second inclination grooves disposed on the opposite sides of the main groove. The right and left second inclination grooves are disposed at symmetrical positions with respect to the equatorial plane of the tire. Blocks are formed on the opposite sides of the main groove by the main groove, right and left first inclination grooves and right and left second inclination grooves. The blocks include right and left first blocks defined by tire rotation direction side portions of the second inclination grooves, main groove and first inclination grooves, and right and left second blocks defined by tire reverse rotation direction side portions of the second inclination grooves, main groove and first inclination grooves. First main groove portions between the right and left first blocks are less in width than second main groove portions between the right and left second blocks.
Abstract:
Disclosed is a pneumatic tire adopting a bias ply structure in which plural carcass layers are disposed so that cords cross each other between the layers, and having an aspect ratio of 55% or less and an outer diameter of 300 mm or less, wherein a cord angle to a tire circumferential direction of said carcass layer is set to a range from 27 to 37° in the center line position, and a surface shape of a tread portion is formed to be straight to a tire width direction in the region of 60 to 75% of a tread width.
Abstract:
A mobile communications system is disclosed. The mobile communications system includes a unit which is provided at an upper-layer node apparatus and which obtains location information of a base station apparatus and one or more mobile station apparatuses; a unit which is provided at the upper-layer node apparatus and which checks whether the mobile station apparatus is authorized to connect to the base station apparatus; a unit which is provided at the upper-layer node apparatus and which calculates a proximity of the base station apparatus and the mobile station apparatus based on the location information of the base station apparatus and the mobile station apparatus; and a unit which is provided at the upper-layer node apparatus and which moves the base station apparatus to a service status when the base station apparatus and the mobile station apparatus are in proximity and moves the base station apparatus to a radio unit stop status when all the mobile station apparatuses are not in proximity with the base station apparatus.
Abstract:
A base station is disclosed. The base station includes: a service area status determination unit configured to determine status of a service area of the base station based on received signals from mobile stations; a total transmission power determination unit configured to determine status of total transmission power of the base station based on total transmission power of surrounding base stations; a transmission power determination unit configured to determine transmission power of a common control channel of the base station based on the status of the service area and the status of the total transmission power; and a transmission power setting unit configured to set the transmission power determined by the transmission power determination unit.
Abstract:
A base station that communicates with a mobile station includes: a storing unit for storing a predetermined number of base station information, each including a base station ID for discriminating a specific base station and parameter information for radio communications set for the specific base station; an acquisition unit for acquiring a base station ID of other base stations forming a destination cell of the mobile station, or a base station ID of other base station forming a source cell of the mobile station; an aggregating unit for aggregating the number of times that each of the base station IDs is acquired in a first time period; a determination unit for determining a priority of each of the base station IDs on the basis of the aggregated results of the acquisition numbers; a judging unit for judging whether or not there is a base station ID which has a priority higher than the base station ID stored in the storage, and whose acquisition number is larger than a predetermined number of times; and a manager for deleting, from the storage, a base station information including a base station ID having a priority lower than the base station ID judged to have a higher priority, and for storing, in the storage, a base station information including the base station ID judged as to have the higher priority, in a case where the judging unit judges there is the base station ID having a higher priority and whose acquisition number is larger.