Tire having beads of specified structure and assembly of rim and bearing support with same

An assembly formed of a tire, its intended mounting rim, and a bearing support for the tire tread, said tire mounted on said rim and having a radial carcass reinforcement, wound in each bead B on at least one bead wire (2) to form an upturn (10), the radially inner face of each said bead being substantially dimensionally identical to the face of the seat of said rim,

• the tire characterized in that, when inflated to its operating pressure, its carcass reinforcement, viewed in meridian section, is wound in at least one of the beads B about a bead wire (2) coated with rubber mix, passing from the heel to the toe of said at least one bead B, the upturn (10) extending in a profile (3) made of rubber mix in the form of a wedge defined by two sides (31 and 32) coming from an apex A located beneath the section of the coated bead wire (2), the radially outer side (31) forming, with a line parallel to the axis of rotation passing through said apex A, an acute angle .phi..sub.1 open radially towards the outside, and the radially inner side (32) forming with said parallel line an acute angle .phi..sub.2, open radially towards the inside, the rubber mix forming the wedge profile (3), axially adjacent to the coated bead wire (2), having a Shore A hardness of at least 65 and greater than the Shore A hardness of any rubber mixes located axially or radially outside the coated bead wire (2) and the wedge profile (3),
• said tire comprising a first bead B, the seat of which is inclined towards the outside, the heel of the bead being axially on the inside, whereas the toe of the bead is axially on the outside, and the carcass reinforcement winding around the coated bead wire (2), passing from the inside to the outside, and a second bead B, symmetrical to the first bead with respect to the equatorial plane of the tire,
• said rim comprising a first rim seat (42) inclined towards the outside, said seat being extended axially on the inside by a rim flange (44) and axially on the outside by a protrusion or hump (41) of low height, and a second rim seat (42) inclined towards the outside, said second seat being extended axially by a rim base (40) on which the bearing support for the tread is placed, one lateral face of which is used as a rim flange, and axially on the outside by a protrusion or Lump (41) of low height.

An assembly formed of a tire, its intended mounting rim, and a bearing support for the tire tread, said tire mounted on said rim and having a radial carcass reinforcement, wound in each bead B on at least one bead wire (2) to form an upturn (10), the radially inner face of each said bead being substantially dimensionally identical to the face of the seat of said rim,

• the tire characterized in that, when inflated to its operating pressure, its carcass reinforcement, viewed in meridian section, is wound in at least one of the beads B about a bead wire (2) coated with rubber mix, passing from the heel to the toe of said at least one bead B, the upturn (10) extending in a profile (3) made of rubber mix in the form of a wedge defined by two sides (31 and 32) coming from an apex A located beneath the section of the coated bead wire (2), the radially outer side (31) forming, with a line parallel to the axis of rotation passing through said apex A, an acute angle .phi..sub.1 open radially towards the outside, and the radially inner side (32) forming with said parallel line an acute angle .phi..sub.2, open radially towards the inside, the rubber mix forming the wedge profile (3), axially adjacent to the coated bead wire (2), having a Shore A hardness of at least 65 and greater than the Shore A hardness of any rubber mixes located axially or radially outside the coated bead wire (2) and the wedge profile (3),
• said tire comprising a first bead B, the seat of which is inclined towards the outside, the heel of the bead being axially on the inside, whereas the toe of the bead is axially on the outside, and the carcass reinforcement winding around the coated bead wire (2), passing from the inside to the outside, and a second bead B, the seat of which is inclined towards the inside, the heel of the bead being axially on the outside, whereas the toe of the bead is axially on the inside, and the carcass reinforcement winding around the coated bead wire (2), passing from the outside to the inside,
• said rim comprising a first rim seat (42') inclined towards the outside, said seat being extended axially on the inside by a rim base (40) on which the bearing support for the tread is placed, one lateral face of which is used as a rim flange, and axially on the outside by a protrusion or hump (41') of low height, and a second rim seat (42") inclined towards the inside, said second rim seat being extended axially on the outside by a rim flange (44) and axially on the inside by a protuberance (41").

An assembly formed of a tire, its intended mounting rim, and a bearing support for the tire tread, said tire mounted on said rim and having a radial carcass reinforcement, wound in each bead B on at least one bead wire (2) to form an upturn (10), the radially inner face of each said bead being substantially dimensionally identical to the face of the seat of said rim,

• the tire characterized in that, when inflated to its operating pressure, its carcass reinforcement, viewed in meridian section, is wound in at least one of the beads B about a bead wire (2) coated with rubber mix, passing from the heel to the toe of said at least one bead B, the upturn (10) extending in a profile (3) made of rubber mix in the form of a wedge defined by two sides (31 and 32) coming from an apex A located beneath the section of the coated bead wire (2), the radially outer side (31) forming, with a line parallel to the axis of rotation passing through said apex A, an acute angle .phi..sub.1 open radially towards the outside, and the radially inner side (32) forming with said parallel line an acute angle .phi..sub.2, open radially towards the inside, the rubber mix forming the wedge profile (3), axially adjacent to the coated bead wire (2), having a Shore A hardness of at least 65 and greater than the Shore A hardness of any rubber mixes located axially or radially outside the coated bead wire (2) and the wedge profile (3),
• said tire comprising a first bead B, the seat of which is inclined towards the inside, the heel of the bead being axially on the outside, whereas the toe of the bead is axially on the inside, and the carcass reinforcement winding around the coated bead wire (2), passing from the outside to the inside, and a second bead B, symmetrical to the first bead with respect to the equatorial plane of the tire,
• said rim formed of three parts, at least two of which are removable, and comprising two rim seats (42', 42") inclined towards the inside, said bearing support for the tread having a maximum axial width in contact with the axially inner walls of the toes of the two beads B of the tire.

An assembly formed of a tire, its intended mounting rim, and a bearing support for the tire tread, said tire mounted on said rim and having a radial carcass reinforcement, wound in each bead B on at least one bead wire (2) to form an upturn (10), the radially inner face of each said bead being substantially dimensionally identical to the face of the seat of said rim,

• the tire characterized in that, when inflated to its operating pressure, its carcass reinforcement, viewed in meridian section, is wound in at least one of the beads B about a bead wire (2) coated with rubber mix, passing from the heel to the toe of said at least one bead B, the upturn (10) extending in a profile (3) made of rubber mix in the form of a wedge defined by two sides (31 and 32) coming from an apex A located beneath the section of the coated bead wire (2), the radially outer side (31) forming, with a line parallel to the axis of rotation passing through said apex A, an acute angle .phi..sub.1 open radially towards the outside, and the radially inner side (32) forming with said parallel line an acute angle .phi..sub.2, open radially towards the inside, the rubber mix forming the wedge profile (3), axially adjacent to the coated bead wire (2), having a Shore A hardness of at least 65 and greater than the Shore A hardness of any rubber mixes located axially or radially outside the coated bead wire (2) and the wedge profile (3),
• said tire comprising a first bead B, the seat of which is inclined towards the inside, the heel of the bead being axially on the outside, whereas the toe of the bead is axially on the inside, and the carcass reinforcement winding around the coated bead wire (2), passing from the outside to the inside, and a second bead B, the seat of which has a generatrix parallel to the axis of rotation, the heel of the bead being axially on the outside and the toe of the bead being axially on the inside, the carcass reinforcement winding around the coated bead wire (2), passing from the outside to the inside,
• said rim formed of three parts, at least two of which are removable, and comprising a first rim seat (42') inclined towards the inside, said seat being extended axially on the outside by a rim flange (44'), and a second rim seat (42"), the generatrix of which is parallel to the axis of rotation, said second rim seat being extended axially by a second rim flange (44"), said bearing support for the tread having a maximum axial width in contact with the axially inner walls of the toes of the two beads B of the tire.

An assembly formed of a tire, its intended mounting rim, and a bearing support for the tire tread, said tire mounted on said rim and having a radial carcass reinforcement, wound in each bead B on at least one bead wire (2) to form an upturn (10), the radially inner face of each said bead being substantially dimensionally identical to the face of the seat of said rim,

• the tire characterized in that, when inflated to its operating pressure, its carcass reinforcement, viewed in meridian section, is wound in at least one of the beads B about a bead wire (2) coated with rubber mix, passing from the heel to the toe of said at least one bead B, the upturn (10) extending in a profile (3) made of rubber mix in the form of a wedge defined by two sides (31 and 32) coming from an apex A located beneath the section of the coated bead wire (2), the radially outer side (31) forming, with a line parallel to the axis of rotation passing through said apex A, an acute angle .phi..sub.1 open radially towards the outside, and the radially inner side (32) forming with said parallel line an acute angle .phi..sub.2, open radially towards the inside, the rubber mix forming the wedge profile (3), axially adjacent to the coated bead wire (2), having a Shore A hardness of at least 65 and greater than the Shore A hardness of any rubber mixes located axially or radially outside the coated bead wire (2) and the wedge profile (3),
• said tire comprising a first bead B, the seat of which is inclined towards the inside, the heel of the bead being axially on the outside, whereas the toe of the bead is axially on the inside, and the carcass reinforcement winding around the coated bead wire (2), passing from the outside to the inside, and a second bead B, the seat of which is inclined towards the outside over at least 75% of its axial width, the heel of the bead being axially on the outside and the toe of the bead being axially on the inside, the carcass reinforcement winding around the coated bead wire (2), passing from the outside to the inside,
• said rim formed of three parts, at least two of which are removable, and comprising a first rim seat (42") inclined towards the inside, said seat being extended axially on the outside by a rim flange (44'), and a second rim seat (42') inclined towards the outside over at least 75% of its axial width, said second rim seat being extended axially on the outside by a rim flange (44"), said bearing support for the tread having a maximum axial width in contact with the axially inner walls of the toes of the two beads B of the tire.