Vehicle tire and rim having tire bead rotatable into assembled condition

Claim 1

In combination, a vehicle wheel which has a rigid one-part rim, and a belted pneumatic tire which is adapted to be mounted on said rim; said tire having a carcass including a wall portion, two beads having bead edges, and in each bead a substantially inextensible core ring having a center of a cross-section thereof; said rim being provided with rim flanges having a minimum diameter and, adjacent thereto, having seating surfaces of the rim for said belted tire in assembled relation thereto; said rim flanges of said rim extending substantially radially inwardly; said rim having a radially inner periphery, with said seating surfaces of said rim for said tire being disposed adjacent to said rim flanges on said radially inner periphery; the improvement therewith comprising: a central diameter of said core rings corresponding approximately to the minimum diameter of said rim flanges; in the mounted state of said tire as assembled on said rim, the distance "a" from the center of the cross-section of a given one of said core rings to that head edge of the associated bead which faces the associated seating surface of the rim being greater than the distance "b" to the axially inner bead edge of that bead; so that during assembly said ssociated bead is rotated relative to the corresponding seating surface of the rim, and so that, during mounting of said tire when assembly further relative to the corresponding seating surface of the rim, said bead is slightly rotatable and/or pivotable in a 90° rotation from radial orientation into axial orientation of said bead edges so that the wall portion of said carcass in assembled condition is radially inwardly of said rim flanges.

Claim 8

A method of mounting a tire on the rim of a wheel for a combination, including a vehicle wheel which has a rigid one-part rim, and a belted pneumatic tire which is adapted to be mounted on said rim; said tire having a carcass including a wall portion, two beads having bead edges, and in each bead a substantially inextensible core ring having a center of a cross-section thereof; said rim being provided with rim flanges having a minimum diameter and, adjacent thereto, having seating surfaces of the rim for said belted tire in assembled relation thereto; said rim flanges of said rim extending substantially radially inwardly; said rim having a radially inner periphery, with said seating surfaces of said rim for said tire being disposed adjacent to said rim flanges on said radially inner periphery; a central diameter of said core rings corresponding approximately to the minimum diameter of said rim flanges; in the mounted state of said tire as assembled on said rim, the distance "a" from the center of a cross-section of a given one of said core rings to that bead edge of the associated bead which faces the associated seating surface of the rim being greater than the distance "b" to the axially inner bead edge of that bead; so that during assembly said associated lead is rotated relative to the corresponding seating surface of the rim, and so that, during mounting of said tire when assembling further relative to the corresponding seating surface of the rim, said bead is slightly rotatable and/or pivotable in 90° rotation from radial orientation into axial orientation of said bead edges so that the wall portion of said carcass in assembled condition is radially inwardly of said rim flanges; the improvement therewith which includes the steps of: moving said rim into the interior of said tire; initially pivoting one of said beads into the mounting position; at one location completely pushing said last-mentioned bead as far as said seating surface of the rim for said tire and lifting it over the rim flange on the opposite side; subsequently centering said tire relative to said rim; pivoting said bead into the operating position; and carrying out the same procedure for the other one of said beads.

Claim 9

A method of mounting a tire on the rim of a wheel for a combination, including a vehicle wheel which has a rigid one-part rim, and a belted pneumatic tire which is adapted to be mounted on said rim; said tire having a carcass including a wall portion, two beads having bead edges, and in each bead a substantially inextensible core ring having a center of a cross-section thereof; said rim being provided with rim flanges having a minimum diameter and, adjacent thereto, having seating surfaces of the rim for said belted tire in assembled relation thereto; said rim flanges of said rim extending substantially radially inwardly; said rim having a radially inner periphery, with said seating surfaces of said rim for said tire being disposed adjacent to said rim flanges on said radially inner periphery; a central diameter of said core rings corresponding approximately to the minimum diameter of said rim flanges; in the mounted state of said tire as assembled on said rim, the distance "a" from the center of a cross-section of a given one of said core rings to that bead edge of the associated bead which faces the associated seating surface of the rim being greater than the distance "b" to the axially inner bead edge of that bead; so that during assembly said associated lead is rotated relative to the corresponding seating surface of the rim, and so that, during mounting of said tire when assembling further relative to the corresponding seating surface of the rim, said bead is slightly rotatable and/or pivotable in 90° rotation from radial orientation into axial orientation of said bead edges so that the wall portion of said carcass in assembled condition is radially inwardly of said rim flanges; the improvement therewith which includes the steps of: moving said rim into the interior of said tire; initially pivoting one of said beads into the mounting position; at one location completely pushing said last-mentioned bead as far as said seating surface of the rim for said tire and lifting it over the rim flange on the opposite side; subsequently centering said tire relative to said rim; pivoting said bead into the operating position; and carrying out the same procedure for the other one of said beads.