Patent ID: 8550489

Claim:
A foldable baby stroller frame for use with at least one front wheel and at least one rear wheel, comprising: left and right side laterally spaced-apart first members, each of the first members having a first end portion and a second end portion; left and right side laterally spaced-apart second members, each of the second members having a first end portion and a second end portion; left and right side laterally spaced-apart third members, each of the third members having a first end portion and a second end portion, at least one of the first end portions of the first members having a mounting portion configured for mounting of the at least one front wheel thereto, at least one of the first end portions of the second members having a mounting portion configured for mounting of the at least one rear wheel thereto, and at least one of the first end portions of the third members having a handle portion; and left and right side laterally spaced-apart folding assemblies, each of the left and right side folding assemblies having a first rotatable member and a second rotatable member rotatably mounted on a pivot member to symmetrically pivot about the pivot member as a common axis, one of the second end portions of a first one of the first, second, and third members being fixedly attached to the first rotatable member, and one of the second end portions of a different second one of the first, second, and third members being fixedly attached to the second rotatable member, wherein the left and right folding assemblies each further include a locking member slidably mounted to the corresponding one of the left and right side of another different third one of the first, second, and third members, and the first and second rotatable members of each folding assembly further include a notch to receive the locking member therein when the first and second rotatable members are rotated about the pivot member to position the handle member, the front wheel support and the rear wheel support in an unfolded state, wherein the locking member is biased by a spring to provide a force adequate to bias the locking member into an engaged state with the notches of the first and second rotatable members.