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1. 发明专利

JPS5695711A INTERNAL PRESSURE CONTROLLER OF TIRE 失效
公开(公告)号：JPS5695711A
公开(公告)日：1981-08-03
申请号：JP17065479
申请日：1979-12-29
申请人： BRIDGESTONE TIRE CO LTD , MITAKA INSTR CO LTD
发明人： MATSUDA AKIRA , HAYAKAWA YOSHIHIRO , YASUDA SHIGEO , IWASAKI MOTOAKI
IPC分类号： B61B13/06 , B60C23/00 , B60C23/02 , B60C23/04 , G08C19/00
摘要： PURPOSE:To get a low-cost and reliable internal pressure controller of tires used for an electric car, by using a noncontact type signal transmission system from the rotary body to the chassis which introduces the internal pressure of tires to a prssure indicator at the driver seat through a rubber hose. CONSTITUTION:The internal pressure of a tire 10 is introduced to a pressure indicator 11 through a rubber hose 12 connected with a tire hub 35. As the internal pressure drops to 8.5kg/cm and a pressure switch is turned off, the current ceases to flow through a resonant coil assembly 14. This eliminates resonance even when both coil assemblies 14, 15 draw near to each other and output of the oscillating coil assembly 15 is not reduced. The detection of a differential signal of output from the oscillating coil assembly 15 leads to the detection of any reduction in the tire pressure through effective control. Being processed by an electric circuit, the differential signal is fed in a controller 16 through a shielded wire 25 to generate an alarm signal and indicate a pressure drop by an indicator 17.

2. 发明专利

JPS56112303A PNEUMATIC TIRE FOR VEHICLE 失效
公开(公告)号：JPS56112303A
公开(公告)日：1981-09-04
申请号：JP1381980
申请日：1980-02-06
申请人： BRIDGESTONE TIRE CO LTD
发明人： TSUKAHARA KAZUMI , HAYAKAWA YOSHIHIRO
IPC分类号： B60C9/26 , B60C9/18 , B60C11/04
摘要： PURPOSE:To provide satisfactory ground contact property and high speed durability in a tire having a sheet of belt folded into at least three layers and embedded in the tread portion, by specifying the width of the upper and lower layers of the folded belt, tensile elastic modulus of cord in the belt, etc. CONSTITUTION:A pneumatic tire is provided with a carcass 4 turned back on both end area around a bead core 7 and a belt 2 surrounding the carcass 4 and folded into at least three layers is embedded in the tread portion 1. Cords in the respective layers of the belt 2 in such tire are arranged to sandwich the equator surface of the tire at angle of 5-30 deg. thereto algernatively in opposite directions, and the width of the belt is rendered 80-120% of the width of ground contact on road face. Also, the width of the upper and lower layers of folded belt is made larger than a half width of the belt itself. Further, the cord of the belt is made to have 40-200g/D of tensile elastic modulus, and the tread portion 1 is formed with two main grooves 1a, 1b.

3. 发明专利

JPS5695708A PENUMATIC SAFETY TIRE IMPROVED IN RUNNFLAT AND WET PERFORMANCE 失效
公开(公告)号：JPS5695708A
公开(公告)日：1981-08-03
申请号：JP17059479
申请日：1979-12-28
申请人： BRIDGESTONE TIRE CO LTD
发明人： BANBA FUMIO , KANEKO YOSHIO , SHIOZAWA SHINJI , HAYAKAWA YOSHIHIRO
IPC分类号： B60C9/20 , B60C9/18 , B60C11/00 , B60C13/00 , B60C17/00
摘要： PURPOSE:To control generation of heat and prevent thermal deterioration, by setting the hardness, tensile stress and rebound elasticity of tire rubber in a preset range, and to improve the run-flat and wet performance of the tire, by using a double-layered tread. CONSTITUTION:Rubber of a side wall 5 is reinforced by material having a property of at least 70 deg.C in JIS hardness, above 10kg/cm in tnesile stress (Mod 25) after a 24hr long ageing test in an inactive environment at 140 deg.C+ or -1 deg.C and above 65% in rebound elasticity using a Dunlop tripsometer. The inner layer, facing a belt layer of a tread 6 is made of elastic material with at least 55 deg. in JIS hardness and above 70% in rebound elasticity, while the outer layer on the side separated from belts 10, 11 is made of elastic material with below 65% in rebound elasticity, the volumetric ratio of both layers being set at below 1.0.

4. 发明专利

JPS5568406A AIRRFILLED SAFETY TIRE WITH EFFECTIVE PUNCTUREEPROOF DRIVABILITY 失效
公开(公告)号：JPS5568406A
公开(公告)日：1980-05-23
申请号：JP14300178
申请日：1978-11-20
申请人： BRIDGESTONE TIRE CO LTD
发明人： KANEKO YOSHIO , YAMAUCHI MAKOTO , SHIOZAWA SHINJI , HAYAKAWA YOSHIHIRO , BANBA FUMIO
IPC分类号： B60C5/00 , B60C1/00 , B60C9/00 , B60C13/00 , B60C17/00
摘要： PURPOSE:To improve drivability scacely free from a puncture of a tire by reinforcing a tire on both side with a rubber which has higher stiffness and an independant property of withstanding a wheel weight. CONSTITUTION:A symmetrical tire is reinforced on both sides with an elastic material of a rubber to provide higher stiffness and independant property of withstanding a wheel weight. The material keeps JIS stiffness 70 deg., tension stres(Mod25) 10kg/cm or more after a 24-hour aging test under the inert circumstance at 140 deg.C + or -1 deg.C, and impact resilience 65% or more by use of a Dunlop trypsometer. Durability against a puncture can be increased.

5. 发明专利

JPS534902A RADIAL TIRE PROVIDING GOOD RIDING QUALITY 失效
公开(公告)号：JPS534902A
公开(公告)日：1978-01-18
申请号：JP7707676
申请日：1976-07-01
申请人： BRIDGESTONE TIRE CO LTD
发明人： SHIBATA MATSUMURA , SATOU AKIO , HAYAKAWA YOSHIHIRO , KANEKO YOSHIO , GOTOU YOSHIHARU , OKADO YOUSUKE , BANBA FUMIO , YOSHIDA TOMONORI
IPC分类号： B60C9/08 , B60C9/00 , B60C15/06
摘要： PURPOSE:To provide a radial tire rendering a good riding quality, which is realized by that the carcass is made of a ply reinforced with a polyethylene fiber, they ply is folded back near the upper end of a rim flange, and a bead filler rubber having a dynamic elasticity of 300kg/sq. cm is filled between the carcass ply and its folded section.

6. 发明专利

JPS534059A SUPERRIGID RUBBER COMPOSITIONS AND TIRES THEREFROM 失效
公开(公告)号：JPS534059A
公开(公告)日：1978-01-14
申请号：JP7707576
申请日：1976-07-01
申请人： BRIDGESTONE TIRE CO LTD
发明人： SHIBATA MATSUMURA , SATOU AKIO , HAYAKAWA YOSHIHIRO , BANBA FUMIO
IPC分类号： B29C67/00 , B29D30/00 , B29D30/48 , B60C15/06 , C08K5/43 , C08L7/00 , C08L21/00
摘要： PURPOSE:The title compsotiions usable as bead filler rubbers for radial tires, prepared by incorporating a dithiodiamine of a specific structure as a vulcanizing agent with natural rubber, a diene rubber, etc.

7. 发明专利

JPS57208232A MANUFACTURE OF HOLLOW ROTARY WHEEL 失效
公开(公告)号：JPS57208232A
公开(公告)日：1982-12-21
申请号：JP9373381
申请日：1981-06-19
申请人： BRIDGESTONE TIRE CO LTD
发明人： TSUKAHARA KAZUMI , KANEKO YOSHIO , KOIKE SADAO , HAYAKAWA YOSHIHIRO , BANBA FUMIO
IPC分类号： B29D30/08 , B29C41/04 , B29C67/00
摘要： PURPOSE:To mold a hollow rotary wheel e.g. a tire, etc. without a conventional core, by pouring a hardenable material into a hollow part, rotating a mold of a hollow rotary wheel, and hardening the material, rotating a rotor of a special shape inserted in the hollow part. CONSTITUTION:A mold 1 composed of a hollow rotary wheel is fixed on a horizontal rotating bed 3 and rotated by a motor 4. Also, at least one rotor 5 of which a shape of an elevation has the same shape as a half part of an axis-directional cross section of an inner peripheral face of the hollow rotating wheel and is spatula like in its entirety is arranged in a hollow part of the mold 1 and a handle part 5a of the rotor 5 is attached detachably to a driving shaft 6 concentric with a rotating shaft 2 of the mold 1. The rotor 5 is rotated e.g. slowly than the mold 1, the hardenable material poured from an injecting pipe 8 between both is formed into a belt like ring object by a velocity difference between both and is hardened with the lapse of time. The mold 1 is preferably constituted from the upper and lower split molds 1a, 1b.

8. 发明专利

JPS57144104A PNEUMATIC TIRE WITHOUT CARCASS 失效
公开(公告)号：JPS57144104A
公开(公告)日：1982-09-06
申请号：JP2963381
申请日：1981-03-02
申请人： BRIDGESTONE TIRE CO LTD
发明人： TSUKAHARA KAZUMI , HAYAKAWA YOSHIHIRO , KANEKO YOSHIO , BANBA FUMIO
IPC分类号： B60C3/04 , B60C3/00 , B60C5/01
摘要： PURPOSE:To heighten the durability of a tire, by approximating the inner curve of the cross section of the tire to conical curves which are based on a curve with a radius of curvature determined by a prescribed formula, outside the maximum width of the cross section of the tire, and extend on prescribed points. CONSTITUTION:The inner curve of the cross section of a tire is limited within a region surrounded by conical curves 2, 3 which are based on a curve 1 with a radius (r) of curvature determined by a formulaI, outside the maximum width of the cross section of the tire, and extend on points used for arc approximation or corresponding to the values rhoo, rhob used in the formula and extend on a point located at a distance of + or -4.3% from a point corresponding to the value rhom used in the formula where (r) denotes the radius of curvature of the inner curve of the cross section of the tire, rho denotes the distance between the axis of rotation of the tire and the inner curve, rhoo denotes the maximum distance from the axis of rotation and the inner curve, rhom denotes the distance between the axis of rotation and the end of the maximum width of the cross section of the tire, rhob denotes the distance between the axis of rotation and a point corresponding to 20% of the maximum height of the inner curve and nu denotes the Poisson's ratio of the molded material of the tire.

9. 发明专利

JPS56142701A PNEUMATIC NONCARCASS TIRE WITH REINFORCING BELT LAYER 失效
公开(公告)号：JPS56142701A
公开(公告)日：1981-11-07
申请号：JP4548480
申请日：1980-04-07
申请人： BRIDGESTONE TIRE CO LTD
发明人： TSUKAHARA KAZUMI , KANEKO YOSHIO , BANBA FUMIO , HAYAKAWA YOSHIHIRO , MATSUDA AKIRA
IPC分类号： B60C3/04 , B60C3/00 , B60C5/01 , B60C9/22
摘要： PURPOSE:To prevent stress or strain concentration, by providing a balanced shape for a reinforcing belt layer insertion section in consideration of the influence of the layer and another balanced shape for other sections extending to both side edges of the layer from the maximum width position of the longitudinal cross section shape of the inside surface of a tire. CONSTITUTION:The circumferential tension of the reinforcing belt layer insertion section of a tire which extends between both side edges B, B of a reinforcing belt layer and that of the other side sections of the tire are set in such a prescribed relation to each other that the circumferential tension of the reinforcing belt layer insertion section is higher than that of the other sections. At the side edge of the reinforcing belt layer, the shapes of the portions of the inside surface 5 of the tire are approximated to each other on the basis of film balance so that the shapes of the portions are made continuous to each other. The tension of the reinforcing belt layer insertion section differs from that of the other outer side sections under the preconditions. In the approximation, the preconditions are determined from the modulus of elasticity of the belt and structure of the reinforcing belt insertion layer and the modulus of elasticity of the elastic material of the other side sections to provide the inside surface 5 with a shape of curvatures of radius according to separate prescribed formulae (not mentioned here).

10. 发明专利

JPS558926A PNEUMATIC TIRE FOR VEHICLE 失效
公开(公告)号：JPS558926A
公开(公告)日：1980-01-22
申请号：JP7974078
申请日：1978-07-03
申请人： BRIDGESTONE TIRE CO LTD
发明人： SHIBATA MATSUMURA , HAYAKAWA YOSHIHIRO
IPC分类号： B60C9/26 , B60C15/06 , C01B21/083
摘要： PURPOSE:To eliminate the scatter in the quality and performance of a pneumatic tire and increase the rigidity of the central part of the tire, by providing folded parts at different angles of 5 to 30 deg. as to the circumferential direction of the tire. CONSTITUTION:A cord piece of large width is obliquely cut off at an angle of 5 to 30 deg. to small pieces. Both the end portions of each small piece are folded on the central portion like S. The width w of the folded end portion is related to that W of a belt as 3/4W

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