公开(公告)号：FR2566335B1

公开(公告)日：1987-05-15

申请号：FR8509662

申请日：1985-06-25

Applicant: BRIDGESTONE CORP

Inventor： TANAKA MAKOTO ,  MIYAMOTO KENJI ,  URA YASUYUKI

IPC: B60C9/18 ,  B60C9/20 ,  B60C9/22 ,  B60C9/28

公开(公告)号：CA2082857C

公开(公告)日：1999-02-02

申请号：CA2082857

申请日：1992-11-13

Applicant: BRIDGESTONE CORP

Inventor： HASHIMOTO TAKATSUGU ,  AKUTAGAWA KEIZO ,  YAGAWA KAZUO ,  TANAKA MAKOTO ,  YAMAGISHI JUNICHI ,  HACHIYA KAZUO

IPC: B60C1/00 ,  B60C11/00

Abstract: In a flame-retardant rubber tire comprising an outer rubber body portion consisting essentially of a tread rubber layer, a sidewall rubber layer extending inward from each side edge of the tread rubber layer toward the vicinity of a bead portion in radial direction and a rubber chafer layer arranged in the vicinity of the bead portion, a flame-retardant rubber composition having an oxygen index of not less than 19.8 but not more than 27.5 is disposed so as to amount at least 20% by weight of the tread rubber layer. Such rubber tires are used in electric vehicles, automobiles, airplanes and the like and have excellent self-extinguishing property and flame-delaying property without damaging other rubber properties.

公开(公告)号：ES2092061T3

公开(公告)日：1996-11-16

申请号：ES92310449

申请日：1992-11-16

Applicant: BRIDGESTONE CORP

Inventor： HASHIMOTO TAKATSUGU ,  AKUTAGAWA KEIZO ,  YAGAWA KAZUO ,  TANAKA MAKOTO ,  YAMAGISHI JUNICHI ,  HACHIYA KAZUO

IPC: B60C1/00 ,  B60C11/00

Abstract: The invention provides a flame-retardant rubber tire comprising an outer rubber body portion consisting essentially of a tread rubber layer 2, a sidewall rubber layer 3 extending inwardly from each side edge of the tread rubber layer 2 toward the vicinity of a bead portion 8 in a radial direction and a rubber chafer layer arranged in the vicinity of the bead portion 8. A flame-retardant rubber composition having an oxygen index of not less than 19.8 but not more than 27.5 is disposed so as to amount to at least 20% by weight of the tread rubber layer 2. Such rubber tires are used in electric vehicles, automobiles, airplanes and the like and having excellent self-extinguishing property and flame-delaying property without damaging other rubber properties.

公开(公告)号：FR2566335A1

公开(公告)日：1985-12-27

申请号：FR8509662

申请日：1985-06-25

Applicant: BRIDGESTONE CORP

Inventor： TANAKA MAKOTO ,  MIYAMOTO KENJI ,  URA YASUYUKI

IPC: B60C9/18 ,  B60C9/20 ,  B60C9/22 ,  B60C9/28

Abstract: The invention relates to a radial tyre for heavy loads comprising a tread strip T, two walls S, a carcass C composed of at least one layer comprising cables approximately perpendicular to the circumferential direction of the tyre and a belt B arranged radially outside the carcass on almost all the tread strip, formed from cables having an elastic modulus at 1 % extension not less than 3 x 10 kg/mm and comprising at least one main layer B1 whose cables are arranged in a helix with a very low helix pitch, being almost parallel to the circumferential direction of the tyre, and at least one auxiliary layer B2 arranged radially inside the main layer and comprising cables inclined at a relatively significant angle on the circumferential direction of the tyre, so that almost all the traction caused in service along the circumferential direction due to the internal pressure is supported by the main layer, which constrains the increase in diameter of the tread strip.

公开(公告)号：DE69212435T2

公开(公告)日：1996-12-19

申请号：DE69212435

申请日：1992-11-16

Applicant: BRIDGESTONE CORP

Inventor： HASHIMOTO TAKATSUGU ,  AKUTAGAWA KEIZO ,  YAGAWA KAZUO ,  TANAKA MAKOTO ,  YAMAGISHI JUNICHI ,  HACHIYA KAZUO

IPC: B60C1/00 ,  B60C11/00

Abstract: The invention provides a flame-retardant rubber tire comprising an outer rubber body portion consisting essentially of a tread rubber layer 2, a sidewall rubber layer 3 extending inwardly from each side edge of the tread rubber layer 2 toward the vicinity of a bead portion 8 in a radial direction and a rubber chafer layer arranged in the vicinity of the bead portion 8. A flame-retardant rubber composition having an oxygen index of not less than 19.8 but not more than 27.5 is disposed so as to amount to at least 20% by weight of the tread rubber layer 2. Such rubber tires are used in electric vehicles, automobiles, airplanes and the like and having excellent self-extinguishing property and flame-delaying property without damaging other rubber properties.

公开(公告)号：FR2617096B1

公开(公告)日：1992-11-27

申请号：FR8808241

申请日：1988-06-20

Applicant: BRIDGESTONE CORP

Inventor： TANAKA MAKOTO ,  MIYAMOTO KENJI

IPC: B60C9/08 ,  B60C11/00 ,  B60C11/01 ,  B60C3/00

公开(公告)号：FR2638125A1

公开(公告)日：1990-04-27

申请号：FR8913944

申请日：1989-10-24

Applicant: BRIDGESTONE CORP

Inventor： TANAKA MAKOTO

IPC: B60C9/20 ,  B60C9/28 ,  B60C11/12

Abstract: The invention relates to high performance tyres with a radial carcass, inflated to a high internal pressure. In such a tyre including a carcass 1, a bracing ply 2 having several layers of crossed cords 4, 5, 6, a tread strip 3 and cuts 10 made in each shoulder of the tread strip at a given spacing in the circumferential direction of the tyre, at least one end part of these cuts 10, located close to one lateral edge of the outermost layer 4 of the bracing ply, extends in the same direction as that in which the cords of the layer 4 extend with respect to the equatorial plane of the tyre. Application particularly to tyres of vehicles, particularly for underground trains or electric trains.

公开(公告)号：CA2000945A1

公开(公告)日：1990-04-24

申请号：CA2000945

申请日：1989-10-18

Applicant: BRIDGESTONE CORP

Inventor： TANAKA MAKOTO

IPC: B60C9/20 ,  B60C9/28 ,  B60C11/12 ,  B60C11/04

Abstract: HEAVY DUTY PNEUMATIC RADIAL TIRES USED UNDER HIGH INTERNAL PRESSURE A heavy duty pneumatic radial tire used under high internal pressure suitable for use in electric trains, subway trains and the like comprises a tread divided into plural ribs by circumferential main grooves, wherein plural sipes are formed in at least shoulder ribs and at least an end portion of each of the sipes located in the vicinity of a side edge of an outermost belt layer is extended at the same side as in an extending direction of cords of the outermost belt layer with respect to the equatorial plane of the tire.

公开(公告)号：DE69212435D1

公开(公告)日：1996-08-29

申请号：DE69212435

申请日：1992-11-16

Applicant: BRIDGESTONE CORP

Inventor： HASHIMOTO TAKATSUGU ,  AKUTAGAWA KEIZO ,  YAGAWA KAZUO ,  TANAKA MAKOTO ,  YAMAGISHI JUNICHI ,  HACHIYA KAZUO

IPC: B60C1/00 ,  B60C11/00

Abstract: The invention provides a flame-retardant rubber tire comprising an outer rubber body portion consisting essentially of a tread rubber layer 2, a sidewall rubber layer 3 extending inwardly from each side edge of the tread rubber layer 2 toward the vicinity of a bead portion 8 in a radial direction and a rubber chafer layer arranged in the vicinity of the bead portion 8. A flame-retardant rubber composition having an oxygen index of not less than 19.8 but not more than 27.5 is disposed so as to amount to at least 20% by weight of the tread rubber layer 2. Such rubber tires are used in electric vehicles, automobiles, airplanes and the like and having excellent self-extinguishing property and flame-delaying property without damaging other rubber properties.

公开(公告)号：CA1319600C

公开(公告)日：1993-06-29

申请号：CA569783

申请日：1988-06-17

Applicant: BRIDGESTONE CORP

Inventor： TANAKA MAKOTO ,  MIYAMOTO KENJI ,  SHIMADA NORIHIRO

IPC: B60C9/08 ,  B60C11/00 ,  B60C11/01

Abstract: HIGH INTERNAL PRESSURE TYPE HEAVY DUTY PNEUMATIC RADIAL TIRES High internal pressure type heavy duty pneumatic radial tires are disclosed, which each comprise a tread. Each tire is formed and vulcanized in a mold, and the tread has an outer contour inside the mold, which outer contour sectionally consists of a curve halving a positive radius of curvature with a curvature center on a side of a tire axis at a central portion of the tread extending between points "m" being oppositely separated from a tread (TW/2) center by 0.64 to 0.85 of a half of a width of the tread and a curve having a negative radius of curvature with a curvature center on a side opposite to the tire axis at tread shoulder portions axially outside said points "m". The negative radius of curvature has an absolute value of 1 to 30 of the tread width (TW). A tread shoulder edge drop-correcting value H3 is in a range from 0.05 to 0.04 of H1 which is a radially dropped amount of an edge of the tread which would be formed in a mold sectionally having a single radius of curvature and the entire outer contour of the tread radially outwardly expands from that inside the . mold by applying a use internal pressure to the tire to form the outer contour of the tread at a single radius of curvature.