Retractable overhead guard

Claim 1

IN A LIFT TRUCK, THE COMBINATION COMPRISING: A CHASSIS, A VERTICAL MAST ASSEMBLY, AN OPERATOR''S SEAT MOUNTED ON SAID CHASSIS, AN OVERHEAD GUARD PIVOTALLY CONNECTED ON A TRANSVERSE PIVOT AXIS TO SAID CHASSIS AT OPPOSITE LATERAL SIDES OF SAID SEAT FOR VERTICAL SWINGING MOVEMENT BETWEEN RAISED AND REARWARDLY RETRACTED POSITIONS, SUPPORT STRUCTURE REARWARD OF SAID MAST ASSEMBLY AND FORWARDLY OF SAID HEAT INCLUDING UPRIGHT SUPPORTS RIGIDLY SECURED TO LATERALLY OPPOSITE SIDES OF SAID CHASSIS AND EXTENDING UPWARDLY TO A HEIGHT LESS THAN THE HEIGHT OF SAID GUARD IN ITS UPRIGHT POSITION, A FORWARDLY AND DOWNWARDLY EXTENDING PART ON SAID GUARD IN VERTICAL LOAD TRANSMITTING RELATION TO SAID SUPPORT STRUCTURE IN THE RAISED POSITION OF SAID GUARD AND POWER MEANS INTERCONNECTED BETWEEN SAID CHASSIS AND SAID GUARD AND SELECTIVELY OPERABLE TO PIVOT SAID GUARD BETWEEN ITS RAISED AND RETRACTED POSITIONS, SAID GUARD IN ITS RETRACTED POSITION BEING OF LESS HEIGHT THAN IN ITS RAISED POSITION.