Patent ID: 8777253

Claim:
A stroller, comprising: a front frame member assembly supporting a pair of laterally spaced apart front wheels; a middle frame member assembly supporting a pair of laterally spaced apart rear wheels; an upper frame member assembly with a push handle portion; first and second laterally spaced apart hubs disposed between and interconnecting the front frame member assembly, the middle frame member assembly, and the upper frame member assembly, the first hub having a first mounting structure projecting from an inward facing surface thereof and the second hub having a second mounting structure projecting from an inward facing surface thereof, the first mounting structure comprising a first shaft extending from the first hub and the second mounting structure comprising a second shaft extending from the second hub, the first and second shafts being axially aligned one with the other, each one of the first and second shafts having two mutually parallel flat sides and two convexly curved sides joining the two mutually parallel flat sides, the two mutually parallel flat sides being separated by a first distance; and a seat assembly comprising at least one seat frame member and first and second connector assemblies disposed one each on opposite sides of the at least one seat frame member, the first and second connector assemblies each comprising a mounting surface having a recessed slot defined therein, each recessed slot having a narrow portion disposed between two relatively wider portions, the narrow portion corresponding approximately to the first distance between the two mutually parallel sides of each of the first and second shafts, wherein the narrow portion of the recessed slot of one of the first and second connector assemblies is aligned with the two mutually parallel sides of one of the first and second shafts, and the narrow portion of the recessed slot of the other one of the first and second connector assemblies is aligned with the two mutually parallel sides of the other one of the first and second shafts, and thereafter the first and second shafts are urged from one of the two relatively wider portions of the respective recessed slot, through the narrow portion and into the other one of the two relatively wider portions for detachably mounting the seat assembly to the first and second hubs.