Light push chairs of the foldable type

Claim 1

A light-weight foldable push chair of the baby-buggy type comprising two foldable side bars on which a basket is supported, and extending slopingly back from lower ends thereof to upper portions thereof, with push handles provided at their upper portions; two rear side bars each having an upper end pivotally coupled to an associated one of the first-mentioned side bars and a lower end; an articulated stay formed of crossed members having lower ends coupled to the associated lower ends of the rear side bars and upper ends coupled to the upper portions of the first-mentioned side bars; four wheels having axle means for mounting the same; a frame for mounting the axle means of said four wheels, the frame being formed of two foldable arms configured in a horizontal cross and articulated at a center portion for folding together, each said arm having an upwardly curving C-shaped portion at each end of the arm and ending at a free end, with the axle means for an associated wheel being mounted on said frame arms in advance of the associated C-shaped portion; Daumont-type suspended link members non-rigidly joining the free ends of said upwardly curving portions of said foldable frame arms to the respective lower ends of the first-mentioned bars and of the rear side bars so that the suspension means effectively behaves as if the axle means were located between the central articulation point of said foldable arms and the respective intersecting plane of said side arms on said lower extending foldable arms to provide increased support and stability to the chair; an articulated strut pivotally connecting each horizontal cross frame arm thereof to lock the same into an open position and rigidly retaining the horizontal cross frame arms in generally the same horizontal plane to prevent imbalance; and the horizontal cross frame arms, each having an upwardly curving C-shaped portion at each end of the arms, axle means being mounted in advance of the C-shaped portion, the Daumont-type connecting link members non-rigidly joining the free end of the upwardly curving portions to respective lower ends of the first-mentioned bars and of the rear side bars, and the articulated strut all cooperating to retain in a generally parallel alignment the corresponding wheels of the chair to prevent imbalance during use.