Patent ID: 8282120

Claim:
A foldable stroller, comprising: left and right front wheels; left and right side laterally spaced-apart front frame members, each of the left and right side front frame members having a forward end portion and a rearward end portion, the forward end portion of the left side front frame member being coupled to the left front wheel and the forward end portion of the right side front frame member being coupled to the right front wheel, the left and right side front frame members being rotatable as a unit; left and right rear wheels; left and right side laterally spaced-apart middle frame members, each of the left and right side middle frame members having a forward end portion and a rearward end portion, the rearward end portion of the left side middle frame member being coupled to the left rear wheel and the rearward end portion of the right side middle frame member being coupled to the right rear wheel, the left and right side middle frame members being rotatable as a unit; left and right side laterally spaced-apart upper frame members, each of the left and right side upper frame members having a forward end portion and a rearward end portion, the left and right side upper frame members being rotatable as a unit; and, left and right side laterally spaced apart folding assemblies each comprising a housing supported by the forward end portion of a corresponding one of the left and right middle frame members, each of the left and right side folding assemblies having disposed within the housing a first rotatable member and a second rotatable member rotatably coupled to a pivot member for rotation about a common axis of rotation, the first rotatable member and the second rotatable member coupled together via a linkage assembly comprising a first linkage arm having a first end pivotally attached to the first rotatable member and a second linkage arm having a first end pivotally attached to the second rotatable member, the linkage assembly further comprising a linkage pin linking together a second end of the first linkage arm that is opposite the first end thereof and a second end of the second linkage arm that is opposite the first end thereof, the housing of each folding assembly having an inner surface defining a guide-channel that extends generally from an edge portion of the housing along a direction toward the pivot member, the linkage pin projecting into the guide channel and being slidingly retained therein, the rearward end portion of a corresponding one of the left and right front frame members being attached to one of the first and second rotatable members and the forward end portion of a corresponding one of the left and right upper frame members being attached to the other one of the first and second rotatable members, wherein the linkage pin slidingly travels within the guide-channel such that the first rotatable member and the second rotatable member rotate relative to each other in a synchronized fashion when the foldable stroller is converted between a rolling configuration and a folded configuration.