Patent ID: 7178822

Claim:
A stroller frame foldable in two dimensions, comprising: a pair of opposing rear rods, each of which has opposite top and bottom end portions; a foldable first stretcher interconnecting said rear rods and foldable in a first direction from a first unfolded position, in which said rear rods are distal from each other, to a first folded position, in which said rear rods are proximate to each other; a pair of front rods, each of which has upper and lower segments with top and bottom end portions, said top end portion of said upper segment of each of said front rods being pivoted to said top end portion of a respective one of said rear rods, said bottom end portion of said upper segment being pivoted to said top end portion of said lower segment so as to permit folding of each of said front rods in a second direction from a second unfolded position, in which said bottom end portion of said lower segment is distal from said top end portion of said upper segment, to a second folded position, in which said bottom end portion of said lower segment is proximate to said top end portion of said upper segment; a pair of opposing bent seat rods, each of which has a rear rising segment that has a bottom end portion pivoted to said bottom end portion of a respective one of said rear rods and that extends upwardly and frontwardly from said bottom end portion thereof, and a front lateral segment that extends laterally and frontwardly from said rear rising segment and that has a front end portion pivoted to said lower segment of a respective one of said front rods at a position between said top and bottom end portions of said lower segment of the respective one of said front rods; a pair of crossed linking rods, each of which is disposed in a diagonal position with respect to said front and rear rods, and each of which has a front end portion that is pivoted to said bottom end portion of said lower segment of a respective one of said front rods, and a rear end portion that is opposite to said front end portion thereof and that is pivoted to one of said bottom end portion of a respective one of said rear rods and said bottom end portion of said rear rising segment of a respective one of said seat rods so as to permit simultaneous folding of said front rods in said first and second directions upon movement of said rear rods toward each other; a pair of opposing pivot seats, each of which is pivoted to said front lateral segment of a respective one of said seat rods at a position adjacent to said rear rising segment so as to be pivotable relative to said seat rods; a pair of opposing pushing levers, each of which has front and rear ends that are pivoted respectively to a respective one of said pivot seats and a respective one of said rear rods so as to push each of said pivot seats to pivot frontwardly relative to said seat rods; and a backrest connected to and extending upwardly and inclinedly from said pivot seats so as to be co-pivotable with said pivot seats relative to said seat rods.