the opening 32 and the shank 28 again constitutes a rigid one piece structure with the front leg 12 the process of climbing stairs is performed as follows when approaching the stairs the operator tilts the cart backward thus lifting up the front wheels of the cart and stations the cart in a position with the front wheels put on top surface of the first step as illustrated by fig1 a the rear wheels of the cart prop against the front wall 40 of the first step now by depressing the controlling bar 17 of the latch 16 the operator releases the latch and makes the handle 15 of the cart capable of moving downward pulling the handle 15 downward clockwise on fig1 b the operator rotates the movable frame assembly around the pivot 25 and lifts up the front legs 12 carrying front wheels 35 in their circular movement the front wheels 35 meet the front wall 42 of the second step fig 10b the front wheel being lifted up from the ground the shank 28 according to the previous description is now capable of rotating around the pivot pin 29 counterclockwise in relation to the front leg 12.