Bead reinforcing structure for radial truck tires

A pneumatic radial ply tire having a tread, two inextensible annular beads, a radial ply structure, the radial ply being wrapped around the beads and having turnup ends, a belt structure located between the tread and the radial ply structure, two sidewalls, and an inner liner, the tire being characterized by:

• a flipper made of nylon fabric, disposed between each bead and the respective ply turnup end;
• a chipper made of steel cords, disposed on the opposite side of the ply from each flipper and adjacent to the portion of each ply turnup end that most closely approaches portions of a wheel rim when the tire is mounted on the wheel rim;
• and
• a patch made of nylon fabric, disposed over the radially outermost portion of each chipper and over the radially outermost portion of each ply turnup end;
• and
• the axially outward portion of the flipper lies radially beyond the turnup end, and the turnup end is located radially beyond the radially outermost reach of the chipper.

A pneumatic radial ply tire having a tread, two inextensible annular beads, a radial ply structure, the radial ply being wrapped around the beads and having turnup ends, a belt structure located between the tread and the radial ply structure, two sidewalls, and an inner liner, the tire being characterized by:

• a flipper made of nylon fabric, disposed between each bead and the respective ply turnup end;
• a chipper made of steel cords, disposed on the opposite side of the ply from each flipper and adjacent to the portion of each ply turnup end that most closely approaches portions of a wheel rim when the tire is mounted on the wheel rim;
• and
• a patch made of nylon fabric, disposed over the radially outermost portion of each chipper and over the radially outermost portion of each ply turnup end;
• and
• each patch extends between about 10 millimeters and about 15 millimeters radially beyond the radially outermost extent of each flipper.

A pneumatic radial ply tire having a tread, two inextensible annular beads, a radial ply structure, the radial ply being wrapped around the beads and having turnup ends, a belt structure located between the tread and the radial ply structure, two sidewalls, and an inner liner, the tire being characterized by:

• a flipper made of nylon fabric, disposed between each bead and the respective ply turnup end;
• a chipper made of steel cords, disposed on the opposite side of the ply from each flipper and adjacent to the portion of each ply turnup end that most closely approaches portions of a wheel rim when the tire is mounted on the wheel rim;
• and
• a patch made of nylon fabric, disposed over the radially outermost portion of each chipper and over the radially outermost portion of each ply turnup end;
• and
• each patch overlaps each turnup end of the ply by between about 7 millimeters and about 15 millimeters.