Load carrier with mode changer

A collapsible load carrier comprising

• a rolling base including a load-support frame and left and right front wheel units coupled to the load-support frame and arranged to roll on ground underlying the rolling base,
• a base pusher mounted for pivotable movement relative to the load-support frame of the rolling base about a base-pusher pivot axis from a stored position arranged to lie alongside and on top of the load-support frame of the rolling base and associated with a flat storage mode of the load carrier in a first direction through a first pivot angle to an upright cart position associated with a front-and-rear-wheel cart mode of the load carrier wherein a rear wheel included in the base pusher is arranged to engage and roll on ground underlying the rolling base and further in the first direction through a second pivot angle to a two-wheel laidback hand-truck position to lie in generally coplanar relation to the load-support frame of the rolling base to define an included angle of 180° therebetween to establish a 2-wheel hand-truck mode of the load carrier in which any rear wheel in the base pusher is disengaged from ground underlying the rolling base and the rolling base is supported for rolling movement only on front wheels included in the left and right front wheel units, and
• a load-carrier mode changer including a rotator-support platform mounted on the load-support frame and a rear linkage coupled to the base pusher and to the rotator-support platform, wherein the rear linkage includes a pivotable base-pusher rotator mounted on the rotator-support platform for pivotable movement about a pusher-rotator pivot axis from a first position associated with the front-and-rear-wheel cart mode of the load carrier to a second position associated with the 2-wheel hand-truck mode of the load carrier, a push rod mounted for movement relative to the pivotable base-pusher rotator and to the base pusher and configured to move the base pusher relative to the load carrier from the two-wheel laidback hand-truck position to the upright cart position in response to pivoting movement of the pivotable base-pusher rotator about the pusher-rotator pivot axis from the first position to the second position, a forward hand-truck lock coupled to the rotator-support platform and configured to engage the pivotable base-pusher rotator when the pivotable base-pusher rotator is moved to assume the first position to retain the pivotable base-pusher rotator in the first position so as to retain the base pusher in the upright cart position, and an aft cart lock coupled to the rotator-support platform to lie in spaced-apart relation to the forward hand truck lock and configured to engage the pivotable base-pusher rotator when the pivotable base-pusher rotator is moved to assume the second position to retain the pivotable base-pusher rotator in the second position so as to retain the base pusher in the two-wheel laidback hand-truck position.