Hand-pushed carrier trolley

Claim 1

A hand-pushed carrier trolley having a bottom frame equipped with front and rear pairs of swiveling wheels and a pair of central wheels located at a lower level than the plane defined by the front and rear pairs of wheels, the improvement wherein (a) said bottom frame comprises (1) two lateral bars placed on opposite sides of the longitudinal plane of symmetry of the trolley and diverging from said plane at an angle α in the direction of the rear of the trolley; (2) two central bars connected at the front ends thereof with the front ends of said lateral bars, said central bars being placed on opposite sides of the longitudinal plane of symmetry and converging toward said plane at an angle β in the direction of the rear of the trolley, said angles α and β having essentially the same value; that the rear ends of the central bars are closer to the plane of symmetry than the front ends thereof; (3) a cross-bar connected between the rear ends of said central bars, whereby the bottom frame has an M-shaped configuration when viewed from the upper rear of the trolley; (4) the spaces between said central and lateral bars being rearwardly open and unimpeded for a substantial distance along said bars, whereby said trolley is partially nestable with an identical second trolley in a front-to-rear direction; and (b) said central wheels being connected beneath said central bars with the rear portions thereof, respectively, said front wheels being connected with the common front ends of said lateral and central bars, respectively, and said rear wheels being connected with the rear ends of said lateral bars, respectively.