Wheelbarrow construction

An improved wheelbarrow construction comprising:

• a receptacle unit including an enlarged receptacle body;
• a main load support unit operatively connected to said receptacle unit, and a first frame member having a pair of rearwardly extending support arms each provided with adjustable handle means;
• a forward wheel assembly operatively connected to said main support unit;
• a rear wheel trailer unit comprising a second frame member pivotally secured on one end to the main load support unit and provided on the other end with a pair of wheel assemblies;
• wherein each of said pair of wheel assemblies comprise:
• a caster wheel and axle operatively connected to a wheel support bracket having a hollow tubular caster swivel projecting upwardly therefrom;
• an automatic brake unit associated with each of the said pair of wheel assemblies, and comprising an elongated brake plunger element including an elongated plunger shaft mounted for reciprocation within the hollow tubular caster shafts of said wheel assemblies, secured on one end to said first frame member;
• and provided on the other end with an enlarged brake pad, which is adapted to releasably engage the pair of wheel assemblies, wherein the automatic brake unit is disposed intermediate the main load support unit and the rear wheel trailer unit wherein, said first and second frame members comprise generally U-shaped frame members, wherein the pair of rearwardly extending support arms have outboard ends and a cross-piece element that extends between said outboard ends, and the second frame member is provided with a pair of forwardly extending support arms;
• and
• a brake override means disposed intermediate the main load support unit and the rear wheel trailer unit, whereby the brake override means is adapted to hold the said elongated brake plunger element out of engagement with said pair of wheel assemblies to temperarily disable said automatic brake unit.