All-terrain baby carriage

Claim 1

An all-terrain baby carriage comprising: a collapsible frame including a front frame member hingedly mounted relative to a rear frame member, and an intermediate frame member hingedly mounted on the frame by a hinge means for motion between a raised position and a lowered position to change the frame from a soft surface configuration to a hard surface configuration, the intermediate frame member including a lock mechanism for locking the intermediate frame member in the lowered position; a baby holding means mounted on the frame; a steering wheel assembly including a steering wheel adapted for rolling across a hard surface, the steering wheel assembly being mounted for swivelling steering motion on the intermediate frame member; and at least two cylindrically shaped drum wheels, each wheel having a width that is substantially greater than the width of the steering wheel and substantially greater than is needed for rolling across a hard terrain surface such that the drum wheels are adapted for rolling across an unprepared soft terrain surface when the baby holding means is holding a baby, one drum wheel being mounted on the front frame member and one drum wheel being mounted on the rear frame member; the steering wheel projecting at least partly below one drum wheel when the intermediate frame member is lowered to the hard surface configuration whereby the steering wheel will elevate the one drum wheel out of contact with a hard surface, and the front and rear frame members hingedly moving relative to one another to bring the drum wheels into close proximity with one another and reduce the volume of the baby carriage when the frame is collapsed for storage.