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公开(公告)号：GB2187147A
公开(公告)日：1987-09-03
申请号：GB8703850
申请日：1987-02-19
Applicant: BRIDGESTONE CORP
Inventor： UEDA HIROSHI , YOSHIGAI HISAAKI , MASUNAGA MIKIO
Abstract: The heavy duty tire (21) includes a pair of bead portions (23), a carcass (24) consisting of one steel cord layer, and a tread portion (25). A rim (30) on which the tire is mounted has a bead base at an angle of approximately 5 DEG relative to a rotational axis of the tire. During inflation of the tire from 7% to 100% of a determined maximum internal pressure, the ratio A/B of an enlargement amount A of a shoulder in a radially outward direction to an enlargement amount B of the bead portion in an axially outward direction is in the range 0.35-0.8, preferably 0.4-0.65, where a radially outward displacement of a shoulder point J spaced by 10 mm from each edge (25a) of the tread towards an equatorial plane Z of the tire is taken as the enlargement amount A of the shoulder, and an axially outward displacement of a bead point K at a height (h) of 27% of the tire sectional height H from the bead heel is taken as the enlargement amount B of the bead portion. … …
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公开(公告)号：DE3705534A1
公开(公告)日：1987-08-27
申请号：DE3705534
申请日：1987-02-20
Applicant: BRIDGESTONE CORP
Inventor： UEDA HIROSHI , YOSHIGAI HISAAKI , MASUNAGA MIKIO
Abstract: A heavy duty pneumatic radial tire including a pair of bead portions, a carcass consisting of one steel cord layer and extending between the bead portions, and a tread portion arranged radially outward of a crown portion of the carcass. A normal rim on which the tire is mounted has a bead seat at an angle of approximately 15 DEG relative to a rotating axis of the tire and engaging the bead portions of the tire. During filling the tire with inner pressure from 7% to 100% of a determined maximum inner pressure of the tire, a ratio A/B of an enlargement amount A of a shoulder in radial and outward directions to an enlargement amount B of the bead portion in axial and outward directions is within 0.25-0.7, preferably 0.3-0.55, where a radial and outward displacement of a shoulder positions J on the shoulder spaced by 10 mm from each end of said tread toward an equatorial plane of the tire is taken as the enlargement amount A of the shoulder in the radial and outward directions, and an axial outward displacement of a bead position K on the bead portion at a height of 21% of a tire sectional height H from a bead heel is taken as the enlargement amount B of the bead portion in axial outward directions.
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公开(公告)号：DE3705532C2
公开(公告)日：1996-06-05
申请号：DE3705532
申请日：1987-02-20
Applicant: BRIDGESTONE CORP
Inventor： UEDA HIROSHI , YOSHIGAI HISAAKI , MASUNAGA MIKIO
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公开(公告)号：GB2187147B
公开(公告)日：1989-11-08
申请号：GB8703850
申请日：1987-02-19
Applicant: BRIDGESTONE CORP
Inventor： UEDA HIROSHI , YOSHIGAI HISAAKI , MASUNAGA MIKIO
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公开(公告)号：DE3705532A1
公开(公告)日：1987-08-27
申请号：DE3705532
申请日：1987-02-20
Applicant: BRIDGESTONE CORP
Inventor： UEDA HIROSHI , YOSHIGAI HISAAKI , MASUNAGA MIKIO
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Patent Agency Ranking
公开(公告)号：DE3705534C2
公开(公告)日：1996-06-05
申请号：DE3705534
申请日：1987-02-20
Applicant: BRIDGESTONE CORP
Inventor： UEDA HIROSHI , YOSHIGAI HISAAKI , MASUNAGA MIKIO
Abstract: A heavy duty pneumatic radial tire including a pair of bead portions, a carcass consisting of one steel cord layer and extending between the bead portions, and a tread portion arranged radially outward of a crown portion of the carcass. A normal rim on which the tire is mounted has a bead seat at an angle of approximately 15 DEG relative to a rotating axis of the tire and engaging the bead portions of the tire. During filling the tire with inner pressure from 7% to 100% of a determined maximum inner pressure of the tire, a ratio A/B of an enlargement amount A of a shoulder in radial and outward directions to an enlargement amount B of the bead portion in axial and outward directions is within 0.25-0.7, preferably 0.3-0.55, where a radial and outward displacement of a shoulder positions J on the shoulder spaced by 10 mm from each end of said tread toward an equatorial plane of the tire is taken as the enlargement amount A of the shoulder in the radial and outward directions, and an axial outward displacement of a bead position K on the bead portion at a height of 21% of a tire sectional height H from a bead heel is taken as the enlargement amount B of the bead portion in axial outward directions.
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公开(公告)号：GB2187146B
公开(公告)日：1989-11-08
申请号：GB8703849
申请日：1987-02-19
Applicant: BRIDGESTONE CORP
Inventor： UEDA HIROSHI , YOSHIGAI HISAAKI , MASUNAGA MIKIO
Abstract: A heavy duty pneumatic radial tire including a pair of bead portions, a carcass consisting of one steel cord layer and extending between the bead portions, and a tread portion arranged radially outward of a crown portion of the carcass. A normal rim on which the tire is mounted has a bead seat at an angle of approximately 15 DEG relative to a rotating axis of the tire and engaging the bead portions of the tire. During filling the tire with inner pressure from 7% to 100% of a determined maximum inner pressure of the tire, a ratio A/B of an enlargement amount A of a shoulder in radial and outward directions to an enlargement amount B of the bead portion in axial and outward directions is within 0.25-0.7, preferably 0.3-0.55, where a radial and outward displacement of a shoulder positions J on the shoulder spaced by 10 mm from each end of said tread toward an equatorial plane of the tire is taken as the enlargement amount A of the shoulder in the radial and outward directions, and an axial outward displacement of a bead position K on the bead portion at a height of 21% of a tire sectional height H from a bead heel is taken as the enlargement amount B of the bead portion in axial outward directions.
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公开(公告)号：GB2187146A
公开(公告)日：1987-09-03
申请号：GB8703849
申请日：1987-02-19
Applicant: BRIDGESTONE CORP
Inventor： UEDA HIROSHI , YOSHIGAI HISAAKI , MASUNAGA MIKIO
Abstract: The heavy duty tire (21) includes a pair of bead portions (23), a carcass (24) consisting of one steel cord layer, and a tread portion (25). A rim (30) on which the tire is mounted has a bead base at an angle of approximately 15 DEG relative to a rotational axis of the tire. During inflation of the tire from 7% to 100% of a determined maximum internal pressure, the ratio A/B of an enlargement amount A of a shoulder in a radially outward direction to an enlargement amount B of the bead portion in an axially outward direction is in the range 0.25-0.7, preferably 0.3-0.55, where a radially outward displacement of a shoulder point J spaced by 10 mm from each edge (25a) of the tread towards an equatorial plane Z of the tire is taken as the enlargement amount A of the shoulder, and an axially outward displacement of a bead point K at a height (h) of 21% of the tire sectional height H from the bead heel is taken as the enlargement amount B of the bead portion.
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公开(公告)号：JPS61268503A
公开(公告)日：1986-11-28
申请号：JP10902585
申请日：1985-05-21
Applicant: BRIDGESTONE CORP
Inventor： SAITO TADASHI , TAKESHITA MICHITAKA , HIRATA YASUSHI , KONDO HITOSHI , YAMAMOTO FUJIO , MASUNAGA MIKIO
Abstract: PURPOSE:To improve durability by forming a space rubber and a soft stiffener rubber with a rubber composition to which a specified quantities of a specific bismaleiamide derivative and a C-nitro-compound are added. CONSTITUTION:A space rubber 7 which is provided on the end part of a belt layer 4 and a soft stiffer rubber 8 which wraps in the end part of a carcass which is folded back at a bead part 1, are formed by a rubber composition which is formed by adding a 0.2-10pts.wt. of bismaleiamide derivative whose general formula is represented by the formula I and a 0.2-5pts.wt. of a C-nitro- compound, to a 100pts.wt. of rubber component consisting of a rubber which is selected from a group consisting of a natural rubber and a diene group synthetic rubber. Due to this formation, durability can be improved.
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公开(公告)号：JPS59120501A
公开(公告)日：1984-07-12
申请号：JP23102982
申请日：1982-12-28
Applicant: BRIDGESTONE CORP
Inventor： YAHAGI MASAHISA , MASUNAGA MIKIO , WATANABE SHIYUUICHI , TANAKA TSUTOMU
Abstract: PURPOSE:To expand a range of the applicable temperature of a tubeless tire for heavy load with a layer of inner liners by forming said layer with three layers and also forming the medium layer solely with halogenated butyl polymer and the inner layer with NR compound. CONSTITUTION:An inner liner layer R is formed in three layers of an internal layer R1, external layer R3 and medium layer R2, and the internal layer R1 is arranged in the range of a tire shoulder, while it is composed of natural rubber of 15-60 weight part and, the rest, compound of halogenated butyl polymer. The medium layer R2, different from rubber part of a rubber compound of the external layer R3, is formed solely by halogenated butyl polymer. Thus, since rust on cord, lowering of adhesion or the like due to infiltration of moisture into the medium layer R2 are prevented and internal crack in the vicinity of a shoulder range in a cold district can also be prevented due to rubber composition of the inner layer R1, all-round use of the tire is possible through expansion of the range of the applicable temperature.
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