Attachment for industrial dump trucks

Claim 1

A DUMP ATTACHMENT FOR AN INDUSTRIAL TRUCK EQUIPPED WITH A FORK LIFT MECHANISM AND A HYDRAULIC POWER SYSTEM OPERABLE UNDER MANUAL CONTROL, SAID LIFT MECHANISM COMPRISING A PLURALITY OF LATERALLY SPACED FORKS EXTENDING GENERALLY HORIZONTALLY, FORWARDLY OF SAID TRUCK AND GENERALLY PARALLEL TO THE LONGITUDINAL AXIS OF THE TRUCK, SAID DUMP ATTACHMENT COMPRISING (A) A BASE COMPRISING A PLURALITY OF GENERALLY TUBULAR ARMS ARRANGED IN CORRESPONDING SPACED RELATION FOR RECEIVING SAID FORKS IN SNUGLY FITTING RELATION WHEREBY TO SUPPORT SAID BASE ON SAID FORKS, AND A GENERALLY HORIZONTAL TRANSVERSE MEMBER INTERCONNECTING SAID ARMS ADJACENT THEIR REARMOST EXTREMITIES, (B) A WORK LOAD CONTAINER SUPPORTING FRAME MOUNTED ON SAID BASE FOR TILTING MOVEMENT ABOUT A HORIZONTAL AXIS GENERALLY PERPENDICULAR TO THE LONGITUDINAL AXIS OF THE TRUCK AND IN PARALLEL SPACED RELATION WITH SAID TRANSVERSE MEMBER, (C) A LATCH ASSEMBLY COMPRISING MEANS ON SAID BASE AND MEANS ON SAID FRAME IN COOPERATIVE RELATION WITH ONE ANOTHER FOR RELEASABLY MAINTAINING SAID FRAME IN UNTILTED RELATION WITH SAID BASE UNDER OPERATOR CONTROL, (D) FIRST AND SECOND CLAMP ASSEMBLIES MOUNTED ON SAID FRAME AND OPERABLE TO ENGAGE COMPLEMENTARY MEANS ON A WORK LOAD CONTAINER SUPPORTED THEREON RELEASABLY TO SECURE SAID CONTAINER IN OPERATIVE POSITION THEREON, SAID FIRST CLAMP ASSEMBLY COMPRISING A FIRST CLAMP MEMBER OPERABLE BETWEEN FIRST AND SECOND POSITIONS RELEASABLY TO ENGAGE FIRST COMPLEMENTARY MEANS ON SAID CONTAINER IN CLAMPING RELATION, SAID SECOND CLAMP ASSEMBLY COMPRISING A PLURALITY OF SECOND CLAMP MEMBERS ARRANGED IN SPACED RELATION WITH SAID FIRST CLAMP MEMBER AND WITH ONE ANOTHER AND OPERABLE BETWEEN INOPERATIVE AND OPERATIVE POSITIONS RELEASABLY TO ENGAGE SECOND COMPLEMENTARY MEANS ON SAID CONTAINER IN CLAMPING RELATION,