Disc brake arrangement for industrial trucks

Claim 1

A MATERIAL-HANDLING VEHICLE, COMPRISING, IN COMBINATION: A FRAME SUPPORTED BY A PLURALITY OF WHEELS, AT LEAST ONE OF SAID WHEELS COMPRISING A POWERED STEERABLE WHEEL CARRIED ON A DRIVE ASSEMBLY ROTATABLY JOURNALLED IN SAID FRAME, SAID DRIVE ASSEMBLY COMPRISING A BASE MEMBER, A MOTOR HAVING AN OUTPUT SHAFT FIXEDLY MOUNTED ON SAID BASE MEMBER, A SPEED REDUCTION GEARING ASSEMBLY AND A BRAKING DISC ATTACHED TO SAID OUTPUT SHAFT OF SAID MOTOR, AND A BRAKING ASSEMBLY RESILIENTLY MOUNTED ON SAID BASE MEMBER, SAID BRAKING ASSEMBLY COMPRISING FIRST AND SECOND HYDRAULIC PISTON-CYLINDER ASSEMBLIES DISPOSED ON OPPOSITE SIDES OF SAID BRAKING DISC, SAID PISTON-CYLINDER ASSEMBLIES COMPRISING A FIRST PISTON MOUNTED WITHIN A FIRST CYLINDER MEMBER AND A SECOND PISTON MOUNTED WITHIN A SECOND CYLINDER MEMBER; RIGID MECHANICAL CONNECTION MEANS INTERCONNECTING SAID CYLINDERS TO SPACE SAID CYLINDERS AT A FIXED DISTANCE SAID EACH OTHER; FIRST BRAKE PAD MEANS DISPOSED BETWEEN SAID FIRST PISTON AND SAID DISC AND CONNECTED TO BE URGED BY SAID FIRST AND SAID DISC AND CONNECTED TO BE URGED BY PRESSION SPRING MEANS CONNECTED TO ACT BETWEEN SAID FIRST PISTON AND SAID FIRST CYLINDER MEMBER TO URGE SAID FIRST BRAKE PAD MEANS FORWARD SAID FIRST SIDE OF SAID DISC; A SECOND BRAKE PAD MEANS DISPOSED BETWEEN SAID SECOND PISTON AND SAID DISC TO BE URGED TOWARD THE OPPOSITE SIDE OF SAID DISC; FIRST MEANS FOR APPLYING HYDRAULIC PRESSURE TO SAID FIRST CYLINDER MEMBER TO COMPRESS SAID SPRING MEANS; AND SECOND MEANS FOR APPLYING HYDRAULIC PRESSURE TO SAID SECOND CYLINDER MEMBER.