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31. 发明专利

JPH0310914A BEAD PART CONSTRUCTION FOR PNEUMATIC RADIAL TIRE 失效
公开(公告)号：JPH0310914A
公开(公告)日：1991-01-18
申请号：JP14353289
申请日：1989-06-06
申请人： BRIDGESTONE CORP
发明人： NAKAGAWA EIKO , KOSEKI HIROYUKI
IPC分类号： B60C15/00 , B60C15/06
摘要： PURPOSE:To improve durability of a bead part by arranging a specific rubber member on the outside in the tire width direction of a reinforcing layer which is arranged on the outside in the radial direction of a tire compared with the folding back end part of a carcass, and also arranging a surface layer rubber on the outside in the tire width direction of the rubber member. CONSTITUTION:A reinforcing layer 13 is arranged on the anti-bead core 12 side in the proximity of the bead core 12 of a carcass 10. The outside end part 13A in the radial direction of a tire of the outside part 13B in the tire width direction of the reinforcing layer 13 is extendedly provided on the outside in the radial direction of the tire compared with the outside end 10C in the radial direction of the tire of the folding back part 10A of the carcass 10. In this case, a hard rubber sheet 29 as a rubber member having a higher modulus value at 20% extension compared with the coating rubber of the reinforcing layer 13 is arranged on the outside in the tire width direction compared with the outside part 13B in the tire width direction of the reinforcing layer 13. A surface layer rubber 34 is arranged on the outside in the tire width direction of the hard rubber sheet 29, for protecting its weatherproof.

32. 发明专利

JPH02270602A PNEUMATIC TIRE FOR TRACK AND BUS 失效
公开(公告)号：JPH02270602A
公开(公告)日：1990-11-05
申请号：JP9151489
申请日：1989-04-11
申请人： BRIDGESTONE CORP
发明人： MATSUMOTO HIROYUKI , KOSEKI HIROYUKI
IPC分类号： B60C3/04 , B60C9/08 , B60C9/18 , B60C11/00
摘要： PURPOSE:To improve the traveling performance on an ice road by specifying a tread width and the difference between both tire outer shapes at a tire equator and a tread edge, respectively, in the subject tire with metal cords having a specified angle buried on multi-layered belt plyes at a belt layer. CONSTITUTION:In a tire 1, there is arranged a belt layer 7 composed of multi- layer belt plys 8 with metal cords buried between a carcass layer 2 and a tread rubber 6. The cord angle of the metal cord buried in an innermost belt ply 8a nearest to the carcass layer 2 to a tire equator face 5 is set to be 45 degree or more. With this arrangement, a tread width, rim width, and the difference between respective tire outer shapes at the tire equator face 5 and tread edges 13, 14 are set at W, R and (d), respectively. The tread width W is set to be 1.3 to 1.6 times the rim width R. Further, the difference (d) is set to be 0.07 to 0.11 times the tread width W.

33. 发明专利

JPH02267010A PNEUMATIC TIRE HAVING TREAD PATTERN WITH IMPROVED ON-ICE AND ON-SNOW PERFORMANCE 失效
公开(公告)号：JPH02267010A
公开(公告)日：1990-10-31
申请号：JP8564889
申请日：1989-04-06
申请人： BRIDGESTONE CORP
发明人： MATSUMOTO HIROYUKI , KOSEKI HIROYUKI
IPC分类号： B60C11/04 , B60C11/12 , B60C11/06
摘要： PURPOSE:To improve the on-snow and on-ice performance of a tire having sipe-equipped ribs or blocks by adjusting the interval between or the depth of the sipes in ranges separated at a circumferential pitch corresponding to an arrangement pitch of a tread pattern so as to change the rigidity cyclically along the circumference. CONSTITUTION:For ribs 2b formed in the middle of a width center part C and a width end shoulder part E in segment ranges l separated at a circumferential pitch corresponding to an arrangement pitch of a treated pattern of a tire, the interval between sipes 3 is changed to change the rib rigidity cyclically along the tread circumference. In this case, it is possible to change the depth of the sipes instead. In this constitution, the number of the sipes can be increased without decreasing the rigidity, thereby the on-snow and on-ice performance can be improved.

34. 发明专利

JPH02246809A PNEUMATIC TIRE OF EXCELLENCE IN BRAKING PERFORMANCE 失效
公开(公告)号：JPH02246809A
公开(公告)日：1990-10-02
申请号：JP6641089
申请日：1989-03-20
申请人： BRIDGESTONE CORP
发明人： MATSUMOTO HIROYUKI , KOSEKI HIROYUKI
IPC分类号： B60C11/00 , B60C11/11 , B60C11/12
摘要： PURPOSE:To improve braking performance on ice for a studless tire by making up a tread rubber with multi layers and forming in the land portion of each layer a number of cutouts in an alternate arrangement between adjacent layers. CONSTITUTION:A tread rubber (T) is formed in a multi-layer structure including three layers, T1 to T3. In positions corresponding to the land portion 2 of respective layers T1 to T3, a number of cutouts (C) with shallow depth are formed in an alternate arrangement to the adjacent layer. Such constitution permits high braking performance of a tire to be maintained without being degraded up to an end, and even if such a cutout as a sipe of being edge element is used a lot, the rigidity of the land portion 2 of a tread is not adversely affected.

35. 发明专利

JPH02241802A PNEUMATIC RADIAL TIRE 失效
公开(公告)号：JPH02241802A
公开(公告)日：1990-09-26
申请号：JP6191289
申请日：1989-03-14
申请人： BRIDGESTONE CORP
发明人： OSAWA YASUO , KONO YOSHIHIDE , KOSEKI HIROYUKI
IPC分类号： B60C9/18 , B60C9/20 , B60C9/22
摘要： PURPOSE:To prevent fracture due to surface distortion of cords at the ends of both sides of plys by providing a means of, for example, using cords that satisfy mutually different specific equations on the outermost side of parallel belt plys in a direction of their width and on a general portion, in a belt layer. CONSTITUTION:A belt layer 11 has parallel belt plys 12, 13 and inclined belt plys 14, 15, and cords 16, 17 are embedded in the parallel belt plys 12, 13. The cords 16, 17 are formed by twisting together filaments 18, 19. Cords which are required to be used at least on the outermost side of the parallel belt plys 12, 13 in a direction of their width must satisfy an equation dXa/lambda

36. 发明专利

JPH02167736A STRIP LIKE LAMINATED REINFORCING MATERIAL AND PNEUMATIC TIRE 失效
公开(公告)号：JPH02167736A
公开(公告)日：1990-06-28
申请号：JP4844789
申请日：1989-03-02
申请人： BRIDGESTONE CORP
发明人： KONO YOSHIHIDE , KADOTA KUNINOBU , KOSEKI HIROYUKI
IPC分类号： B60C9/20 , B29D30/38 , B29K21/00 , B29K105/10 , B29L9/00 , B32B5/00 , B32B5/08 , B60C9/18 , B60C9/22 , B60C15/06
摘要： PURPOSE:To realize sufficient reinforcement by availably avoiding the generation of trouble such as separation or cracking in a product composed of a polymeric composite material, in a reinforcing core composed of the polymeric composite material, by generating resistance almost uniform in a lateral direction against the forces in all of directions acting on the reinforced surface due to the embedding of said core and markedly reducing the difference in level of rigidity apt to generate in a reinforced side edge. CONSTITUTION:The phases, amplitudes and wavelengths of reinforcing elements between respective layers are different respectively and the reinforcing elements 1, 1' each composed of a plurality of cords or filaments becoming orientation arranging in alignment with a waveform within the same plane are respectively united in a laminar state by the coating with a polymer material having modulus elasticity lower than that of said elements 1, 1', most typically, rubber to form a plurality of strips. For example, layer of each of the strips has a knot region where the respective reinforcing elements 1 are overlapped in a crossing state between two reinforcing elements 1' occupying the other layer adjacent to said layer and forms a laminated structure wherein the orientation directions of the reinforcing elements 1, 1' of all of the strips are aligned in the same direction. Numerals 2, 2' show knot regions overlapped between the mutual reinforcing elements in a crossing state.

37. 发明专利

JPH02141304A PNEUMATIC TIRE 失效
公开(公告)号：JPH02141304A
公开(公告)日：1990-05-30
申请号：JP29227288
申请日：1988-11-21
申请人： BRIDGESTONE CORP
发明人： KONO YOSHIHIDE , KOSEKI HIROYUKI
IPC分类号： B60C9/18 , B60C9/20 , B60C9/22
摘要： PURPOSE:To improve the durability of a belt by orienting at least one layer of reinforcing elements out of stripes forming the belt in a wave form, and specifying the ratios of an amplitude end of peripheral length of a tire to a pitch of a wave form respectively. CONSTITUTION:A pneumatic tire is provided with a toroid-shaped carcass as a body reinforcement. The periphery of the carcass is provided with a belt formed of strips which use many cords or filaments as a reinforcing element and are coated with high polymer materials having low elastic modulus to reinforce a tread. In this case, at least one layer of the reinforcing element is oriented in a wavelike or a zigzag shape. The ratio of an amplitude (a) shown by distance from a peak to an adjacent peak to the pitch (l) of a wave form, namely a/l established within the range from 0.01 to 0.35. In addition to that, the ratio of the pitch length (l) to the longest peripheral length L of the tire having normal internal pressure, namely l/L is established less than 0.025.

38. 发明专利

JPH0292703A PNEUMATIC TIRE 失效
公开(公告)号：JPH0292703A
公开(公告)日：1990-04-03
申请号：JP24183688
申请日：1988-09-27
申请人： BRIDGESTONE CORP
发明人： KONO YOSHIHIDE , KOSEKI HIROYUKI
IPC分类号： B60C9/18 , B60C9/20 , B60C9/22
摘要： PURPOSE:To prevent the generation of a filament having small tensile force at the time of bending reinforcing elements in a wave form, etc. in a plane and sufficiently reduce rolling resistance and heat generation by forming each reinforcing element embedded in a reinforcing layer with a single-line filament. CONSTITUTION:In a pneumatic tire 11, a number of reinforcing cords 15 are embedded in the carcass plies 13 of a carcass layer 14. A belt layer 17 in which two or more layers of belt plies 16 are superposed is provided on the outside in the radial direction of the carcass layer 14. Further, a reinforcing layer 26 is provided on the outside in the radial direction of the belt layer 17, and a plural number of reinforcing elements 29 made of steel which extend in the circumferential direction are provided in the reinforcing plies 28 thereof. In this case, each reinforcing element 29 is formed with a single-line filament while being bent in a wave form or in zigzag in a plane parallel to both sides of the reinforcing ply 28.

39. 发明专利

JPH01122704A FLAT RADIAL TIRE 失效
公开(公告)号：JPH01122704A
公开(公告)日：1989-05-16
申请号：JP28081487
申请日：1987-11-06
申请人： BRIDGESTONE CORP
发明人： KUKIMOTO TAKASHI , KOSEKI HIROYUKI
IPC分类号： B60C11/04 , B60C9/08 , B60C9/18 , B60C9/22 , B60C11/12
摘要： PURPOSE:To surely prevent uneven wear such a rib punch, river wear or the like of a tire by specifying positions of the widthwise inner ends of both side reinforcing layers, and by forming several lateral grooves in a center rib. CONSTITUTION:A tire 1 is composed of a carcass layer 2, a tread 7, a belt layer 10, and a reinforcing layer 13 and the like. Several main grooves 8a through 8d are formed in the outer periphery of the tread 7 so that a center rib 9a and a pair of side ribs 9b are formed. Further, a reinforcing ply 14 in the reinforcing layer 13 is formed of both side plies 16, 17. In this arrangement, the widthwise inner ends 27, 28 of both side plies 16, 17 are located widthwise outward from the widthwise innermost ends 29, 30 of the main grooves 8b, 8c between both ribs 9a, 9b. A plurality of lateral grooves (not shown) are formed in the center rib 9a, being circumferentially spaced from each other and being opened at both ends, respectively to the main grooves 8b, 8c.

40. 发明专利

JPH01101202A PNEUMATIC RADIAL TIRE FOR HEAVY DUTY 失效
公开(公告)号：JPH01101202A
公开(公告)日：1989-04-19
申请号：JP25798987
申请日：1987-10-12
申请人： BRIDGESTONE CORP
发明人： IKEDA HIROMICHI , KOSEKI HIROYUKI , ICHIKI YASUBUMI
IPC分类号： B60C3/04 , B60C9/08 , B60C13/00
摘要： PURPOSE:To improve traveling performance on ice and snow and also controlability in the captioned tire having a tread in block type pattern by setting the configurations of a carcass and the side part of the carcass to satisfy a predetermined condition. CONSTITUTION:A tire having a toroika-like radial carcass, two-ply belt layer and tread in block pattern is assembled into a tube type normal rim and the configuration of the carcass filled with normal inner pressure is set to satisfy a formula (1). The configuration of the side part of the carcass is set to satisfy a formula (2). Further, the configuration of the belt layer and the relation between the carcass and belt layer are set to satisfy formulas (3) and (4), respectively. With this arrangement, it is possible to improve traveling performance on ice and snow and also controlability.

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