Child stroller with height-adjustable rear seat

A child stroller comprising:

• a generally box-like frame, defining a front end and a rear end, formed of generally tubular members linked together to provide a support structure for at least two child seats and a wheelbase for the attachment of at least three wheels, the frame including two laterally spaced generally tubular members extending upwardly and rearwardly at an angle with respect to the wheelbase;
• at least three wheels attached to the wheelbase of the frame, two of said wheels being attached at the rear of the wheelbase on either side of the wheelbase and defining a common axis of rotation, such axis being generally orthogonal to the upwardly extending angled frame members;
• a front seat, having a seat bottom, mounted on the frame towards the front end and designed to accommodate a child, such that the seat bottom of the front seat is defined within a reference plane which is generally parallel with the plane defined by the wheelbase
• a rear seat slidably mounted on the two upwardly extending angled frame members and designed to accommodate a child, such rear seat defining a generally flat seat bottom panel, the plane defined by the bottom panel being generally parallel to the reference plane, wherein the rear seat comprises a generally rectangular rear panel slidably mounted on the two upwardly extending angled frame members, a generally flat generally rectangular bottom panel hingably attached on one edge to the rear panel, and a generally flat generally rectangular front panel hingably attached on one edge to the bottom panel, said rear and front panels defining U-shaped leg holes, such U-shaped leg holes having open ends oriented towards the bottom panel;
• and
• means for sliding the rear seat along the length of the two upwardly extending angled frame members, wherein said sliding means includes locking means for locking the rear seat in a range of positions between an uppermost position and a lowermost position, and the axis of rotation of the rear wheels is located as far rearward on the wheelbase of the stroller as necessary so as to coincide with the uppermost position of the rear seat.