公开(公告)号：FR2578789B1

公开(公告)日：1989-09-22

申请号：FR8603706

申请日：1986-03-14

Applicant: BRIDGESTONE CORP

Inventor： FURUYA SHINICHI ,  KADOTA KUNINOBU ,  TOGASHI MINORU ,  KATO KENSHIRO

IPC: B60C3/04 ,  B60C9/20 ,  B60C11/00 ,  B60C15/06

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.

公开(公告)号：FR2624063A1

公开(公告)日：1989-06-09

申请号：FR8816075

申请日：1988-12-07

Applicant: BRIDGESTONE CORP

Inventor： AOKI YASUTOSHI ,  KADOTA KUNINOBU

IPC: B60C9/18 ,  B60C9/22 ,  B60C15/00

Abstract: A heavy duty pneumatic radial tire includes a toroidal carcass consisting of plies having cords arranged in parallel with each other, and a plurality of belt layers interposed between the carcass and a tread of the tire. At least one of the plies has turn-up portions folded about a pair of bead cores from inside to outside of the tire. The tire comprises a crown protective layer arranged between the belt layers and the tread. The crown protective layer comprises wave-form cords or wave-form filaments. The tire further comprises a cushion rubber layer arranged radially inward of the protective layer and made of a rubber having a modulus less than 70 kg/cm2 under 100% elongated condition. A distance between cords of a radially outermost layer of the belt layers and the wave-form cords or the wave-form filaments of the radially innermost layer of the crown protective layer is more than 1.5 mm.

公开(公告)号：FR2578789A1

公开(公告)日：1986-09-19

申请号：FR8603706

申请日：1986-03-14

Applicant: BRIDGESTONE CORP

Inventor： FURUYA SHINICHI ,  KADOTA KUNINOBU ,  TOGASHI MINORU ,  KATO KENSHIRO

IPC: B60C3/04 ,  B60C9/20 ,  B60C11/00 ,  B60C15/06

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.

公开(公告)号：DE60020418D1

公开(公告)日：2005-07-07

申请号：DE60020418

申请日：2000-01-27

Applicant: BRIDGESTONE CORP

Inventor： TSUKAGOSHI TETSUHITO ,  WATANABE TAKESHI ,  KADOTA KUNINOBU ,  OGAWA YUICHIRO

IPC: B29D30/32 ,  B60C13/00 ,  B60C15/00 ,  B60C15/024 ,  B60C15/06

Abstract: A pneumatic tire comprises a carcass comprised of at least one carcass ply (15) containing a steel cord(s) arranged at a cord angle of 70-90 DEG with respect to an equatorial plane of the tire and toroidally extending between a pair of bead cores (14) and turned up around the bead core inward or outward in a radial direction to form a turnup portion, wherein a wrap part (17) wrapping on a peripheral face of the bead core therealong is formed in the turnup portion of the carcass ply.

公开(公告)号：DE69400668D1

公开(公告)日：1996-11-14

申请号：DE69400668

申请日：1994-04-22

Applicant: BRIDGESTONE CORP

Inventor： KADOTA KUNINOBU ,  KOSEKI HIROYUKI ,  TOYODA KENJI

IPC: B60C3/04 ,  B60C9/20 ,  B60C9/26 ,  B60C11/00

公开(公告)号：ES2048208T3

公开(公告)日：1994-03-16

申请号：ES88311693

申请日：1988-12-09

Applicant: BRIDGESTONE CORP

Inventor： KADOTA KUNINOBU ,  IMAI ISAMU ,  INADA NORIO

IPC: B60C9/00 ,  B60C9/20

公开(公告)号：DE68912253D1

公开(公告)日：1994-02-24

申请号：DE68912253

申请日：1989-09-18

Applicant: BRIDGESTONE CORP

Inventor： KOHNO YOSHIHIDE ,  KADOTA KUNINOBU ,  KOSEKI HIROYUKI ,  MATSUSHITA NORINAGA

IPC: B60C9/20 ,  B60C9/22

公开(公告)号：DE68907088D1

公开(公告)日：1993-07-22

申请号：DE68907088

申请日：1989-03-09

Applicant: BRIDGESTONE CORP

Inventor： KADOTA KUNINOBU ,  KOHNO YOSHIHIDE ,  KOSEKI HIROYUKI

IPC: B60C9/20 ,  B29D30/38 ,  B29K21/00 ,  B29K105/10 ,  B29L9/00 ,  B32B5/00 ,  B32B5/08 ,  B60C9/18 ,  B60C9/22 ,  B60C15/06

Abstract: A strip-like reinforcing laminate has at least two laminated strips each containing wave-like or zigzag reinforcing elements (1, 1 min ) covered with a particular polymer material, wherein each reinforcing element (1) in each of these strips has regions (2, 2 min ) crossing over at least two reinforcing elements (1 min ) included in the adjoining strip, and the reinforcing elements in all of these strips are aligned in the same direction. Further, such a reinforcing laminate is used as a reinforcement in various parts of a pneumatic tire.

公开(公告)号：DE3783349T2

公开(公告)日：1993-04-15

申请号：DE3783349

申请日：1987-11-06

Applicant: BRIDGESTONE CORP

Inventor： SATO KIYOSHI ,  KADOTA KUNINOBU ,  SHIMADA TATSURO ,  KOSEKI HIROYUKI

IPC: B60C3/04 ,  B60C11/00

Abstract: A heavy duty radial tire includes at least one radial carcass extending from one bead portion to the other bead portion and using inextensible cords and a belt arranged outwardly of the radial carcass for reinforcing a tread of the tire. The tire comprises, during expanding of the tire from 5% to 100% of a normal inner pressure, a first profile portion (5) expanding radially outwardly in a tread zone, a second profile portion (7) depressing axially inwardly of the tire in a radially outer zone of a sidewall from one end (4) of said tread to a tire maximum width position (6) when filled with the normal inner pressure, and a third profile portion (9) expanding axially outwardly of the tire in a radially inner zone of the sidewall from the tire maximum width position (6) when filled with the normal inner pressure to a parting point (8) of the sidewall from the rim, thereby properly distributing strains occurring in the tire in filling with the normal inner pressure. Moreover, a carcass profile in the radial cross-section of the tire filled with an inner pressure 5% of the normal inner pressure and under no load condition is a composite curve smoothly passing through points R, A and G, and the carcass profile fulfills three relations relative to a maximum distance H of the carcass line C from the bead base line RL with respect to maximum distance deviated from an equilibrium configuration curve N.

公开(公告)号：DE3783349D1

公开(公告)日：1993-02-11

申请号：DE3783349

申请日：1987-11-06

Applicant: BRIDGESTONE CORP

Inventor： SATO KIYOSHI ,  KADOTA KUNINOBU ,  SHIMADA TATSURO ,  KOSEKI HIROYUKI

IPC: B60C3/04 ,  B60C11/00

Abstract: A heavy duty radial tire includes at least one radial carcass extending from one bead portion to the other bead portion and using inextensible cords and a belt arranged outwardly of the radial carcass for reinforcing a tread of the tire. The tire comprises, during expanding of the tire from 5% to 100% of a normal inner pressure, a first profile portion (5) expanding radially outwardly in a tread zone, a second profile portion (7) depressing axially inwardly of the tire in a radially outer zone of a sidewall from one end (4) of said tread to a tire maximum width position (6) when filled with the normal inner pressure, and a third profile portion (9) expanding axially outwardly of the tire in a radially inner zone of the sidewall from the tire maximum width position (6) when filled with the normal inner pressure to a parting point (8) of the sidewall from the rim, thereby properly distributing strains occurring in the tire in filling with the normal inner pressure. Moreover, a carcass profile in the radial cross-section of the tire filled with an inner pressure 5% of the normal inner pressure and under no load condition is a composite curve smoothly passing through points R, A and G, and the carcass profile fulfills three relations relative to a maximum distance H of the carcass line C from the bead base line RL with respect to maximum distance deviated from an equilibrium configuration curve N.