Patent ID: 7419181

Claim:
A foldable carriage body adapted to carry a seat, said carriage body comprising: a front leg having a front wheel; a rear leg having a rear wheel and an upper end pivotally connected, at a first axis, to an upper end of said front leg; a push rod having a front end with a hole therein slidably receiving said front leg so that said front end of said push rod is slidable along said front leg during a folding operation in which said front wheel and said rear wheel come close to each other, and said push rod further having a middle part pivotally connected to said rear leg at a second axis apart from said first axis; a position fixing device adapted to fix a positional relation among said front leg, said rear leg and said push rod in both open and folded states; and a seat supporting member fixed to said push rod so as to be adapted to support the seat from beneath.