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公开(公告)号：AU568447B2
公开(公告)日：1987-12-24
申请号：AU5471786
申请日：1986-03-13
Applicant: BRIDGESTONE CORP
Inventor： FURUYA SHINICHI , KADOTA KUNINOBU , TOGASHI MINORA , KATO KENSHIRO
Abstract: A heavy duty pneumatic radial tire includes a carcass consisting of at least one layer of metal cords substantially radially arranged, a breaker consisting of at least two layers of metal cords to form a main reinforcement with the carcass, and bead portions including hard and soft stiffeners. The carcass has a particular radial profile having a ratio of radii R/R' determined by a radius R' of a standard circle and a radius R determined by a particular definition and has a maximum distance f between an arc of the standard circle and the remaining carcass line smoothly extending from the profile curvature of the shoulder. Moreover a radial profile over a radially inner zone of the sidewall of 20-45% of the radial height SH has a curvature 1/ rho less than 6x10-3 mm-1 at a location 32.5% of the radial height corresponding to a center of the profile.
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公开(公告)号：CA1214715A
公开(公告)日：1986-12-02
申请号：CA462652
申请日：1984-09-07
Applicant: BRIDGESTONE CORP
Inventor： TOGASHI MINORU , TSUDA TORU , KATO KENSHIRO , FURUYA SHINICHI
Abstract: A pneumatic radial tire for passenger car is disclosed, which comprises a tread portion, a pair of sidewall portions, a pair of bead portions, a radial carcass, a belt and a rubber filler. In this type of the tire, the carcass has such a radial profile of a carcass line in tire section that when the tire is mounted on a normal rim and inflated at a working internal pressure, a ratio of radii R/R' is within a range of 0.65-0.85 and f is within a range of 5-10 mm, where R' is a radius of a standard arc passing through points B, E and C, R is a radius of curvature in a curved line of a shoulder profile of the carcass line passing through the point C, and f is a maximum distance between the standard arc and the remaining carcass line smoothly extending from the curved line of the shoulder profile to the point B and having a single inflection point. Further, the tread has a width corresponding to 55-62% of the tire width, and the working internal pressure is higher by 25-50% than a normal internal pressure.
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公开(公告)号：DE69614976T2
公开(公告)日：2002-04-11
申请号：DE69614976
申请日：1996-11-28
Applicant: BRIDGESTONE CORP
Inventor： KATO KENSHIRO
IPC: B60C9/08 , B60C3/04 , B60C9/18 , B60C9/20 , B60C15/00 , B60C15/02 , B60C15/024 , B60C15/04 , B60C15/06
Abstract: In a pneumatic radial tire for trucks and buses mounted on a 15 DEG center drop rim, an envelope surface (4-13) of the bead core (4) among members constituting the bead portion (1) of the tire has a curved shape concavedly directing toward the outside of the tire at a region opposite to an inner curved surface (21S) of a slantly rising portion in a flange (21F) of an approved rim (21), whereby the durability of the bead portion and the steering stability of the tire may be considerably improved.
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公开(公告)号：FR2608515A1
公开(公告)日：1988-06-24
申请号：FR8601511
申请日：1986-02-04
Applicant: BRIDGESTONE CORP
Inventor： KATO KENSHIRO , TANIGUCHI MOTOAKI , YAMADA SHIGEKI , TAKAHASHI MASANOBU , ENDO KAZUYUKI
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公开(公告)号：EP1780054A4
公开(公告)日：2009-07-01
申请号：EP05766457
申请日：2005-07-20
Applicant: BRIDGESTONE CORP
Inventor： KAMEGAWA TATSUHIKO , KATO KENSHIRO , TSURUTA MAKOTO , MIYAZONO TOSHIYA , WAKI YOSHIYUKI
CPC classification number: B60C15/0081 , B29D30/48 , B60C15/0018 , Y10T152/10819
Abstract: A tire enabling the structure of bead parts to be simplified without sacrificing the durability of the bead parts and a steering stability, and a method of manufacturing the tire. The tire comprises a carcass extending in a toroidal shape between a pair of bead cores buried in the both bead parts. The carcass is bound to the bead cores in a route which extends to the tire inner faces of the bead cores through the inside of the tire axial thickness center of the bead parts is passed through the bead cores from the inside to the outside of the tire and terminates in contact with the surfaces of the bead bases on the bead base sides.
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Patent Agency Ranking
公开(公告)号：CA1271114A
公开(公告)日：1990-07-03
申请号：CA504175
申请日：1986-03-14
Applicant: BRIDGESTONE CORP
Inventor： FURUYA SHINICHI , KADOTA KUNINOBU , TOGASHI MINORU , KATO KENSHIRO
Abstract: REDUCED ROLLING RESISTANCE PNEUMATIC RADIAL TIRE A heavy duty pneumatic radial tire includes a carcass consisting of at least one layer of metal cords substantially radially arranged, a breaker consisting of at least two layers of metal cords to form a main reinforcement with the carcass, and bead portions including hard and soft stiffeners. The carcass has a particular radial profile having a ratio of radii R/R' determined by a radius R1 of a standard circle and a radius R determined by a particular definition and has a maximum distance f between an arc of the standard circle and the remaining carcass line smoothly extending from the profile curvature of the shoulder. Moreover a radial profile over a radially inner zone of the sidewall of 20-45% of the radial height SH has a curvature 1/p less than 6x10-3 mm-1 at a location 32.5% of the radial height corresponding to a center of the profile.
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公开(公告)号：GB2171067B
公开(公告)日：1989-06-07
申请号：GB8602738
申请日：1986-02-04
Applicant: BRIDGESTONE CORP
Inventor： KATO KENSHIRO , TANIGUCHI MOTOAKI , YAMADA SHIGEKI , TAKAHASHI MASANOBU , ENDO KAZUYUKI
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公开(公告)号：CA1219798A
公开(公告)日：1987-03-31
申请号：CA462653
申请日：1984-09-07
Applicant: BRIDGESTONE CORP
Inventor： TOGASHI MINORU , TSUDA TORU , KATO KENSHIRO , FURUYA SHINICHI
Abstract: Disclosed herein is a pneumatic radial tire for use in a muddy road and/or a snow road, which comprises a pair of annular side wall portions each provided with a bead portion, a tread portion extended over the side wall portions outside in the radial direction of the tire, and a reinforcement consisting of a carcass composed of at least one cord ply containing organic fiber cords therein, which cord ply being wound around a bead core embedded in each of the bead portions from the inside to the outside of the tire, and a belt composed of at least two ply layers superimposed around the crown portion of the carcass and containing rubberized cords of a high elasticity arranged at a relatively small inclination angle with respect to the midcircumferential plane of the tire, the cords of which being crossed with each other, and rubber fillers each filled between the carcass and the turn-up portion thereof for hardening the bead portion. The carcass radial profile is varied by enlarging the negative ratio with use of a block pattern, and deepening the grooves of the pattern in the tread.
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公开(公告)号：AU5471786A
公开(公告)日：1986-09-18
申请号：AU5471786
申请日：1986-03-13
Applicant: BRIDGESTONE CORP
Inventor： FURUYA SHINICHI , KADOTA KUNINOBU , TOGASHI MINORU , KATO KENSHIRO
Abstract: A heavy duty pneumatic radial tire includes a carcass consisting of at least one layer of metal cords substantially radially arranged, a breaker consisting of at least two layers of metal cords to form a main reinforcement with the carcass, and bead portions including hard and soft stiffeners. The carcass has a particular radial profile having a ratio of radii R/R' determined by a radius R' of a standard circle and a radius R determined by a particular definition and has a maximum distance f between an arc of the standard circle and the remaining carcass line smoothly extending from the profile curvature of the shoulder. Moreover a radial profile over a radially inner zone of the sidewall of 20-45% of the radial height SH has a curvature 1/ rho less than 6x10-3 mm-1 at a location 32.5% of the radial height corresponding to a center of the profile.
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公开(公告)号：GB2148214A
公开(公告)日：1985-05-30
申请号：GB8423240
申请日：1984-09-14
Applicant: BRIDGESTONE CORP
Inventor： TOGASHI MINORU , TSUDA TORU , KATO KENSHIRO , FURUYA SHINICHI
Abstract: In order to minimise the reduction in cornering ability and the increase in rolling resistance which is normally associated with the large negative ratio and the deep grooves of the tread pattern of a high traction tire for use on muddy and/or on snowy or icy roads the carcass has a radial profile such that when the tire is mounted on a normal rim and inflated at a working internal pressure, a ratio of radii R/R' is within a range of 0.65-0.85 and f is within a range of 5-10 mm, where R' is a radius of a reference arc passing through points B, E and C; R is a radius of curvature of a contour curve in a shoulder portion of the carcass line extending to the point C, and f is the maximum distance between the reference arc and a contour curve in the remaining portion of the carcass line smoothly connecting to the above contour curve and having a single infection point toward the point B. Further, the tread portion is provided with a pattern of block type having a negative ratio of 33-40%, and the pattern is formed with relatively deep grooves (e.g. 10.5 mm).
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