Hook attachment for a fork lift vehicle

Claim 1

A HOOK ATTACHMENT FOR AN ARTICLE LIFT VEHICLE HAVING A PAIR OF FORWARDLY PROJECTED FINGERS MOVABLE IN UP AND DOWN DIRECTIONS COMPRISING; (A) A PAIR OF PLATE MEMBERS, EACH PLATE MEMBER HAVING AN UPPER SECTION FORMED WITH A PAIR OF FIRST HOLES FOR ACCOMMODATING THE FORWARDLY PROJECTED FINGERS AND A LOWER SECTION FORMED WITH A SECOND HOLE, SAID UPPER SECTION BEING ANGULARLY DISPOSED WITH RESPECT TO SAID LOWER SECTION TO FORM AN APEX SECTION EXTENDED SUBSTANTIALLY PARALLEL TO THE PLANE OF THE PAIR OF FIRST HOLES, SAID PLATE MEMBERS WHEN MOUNTED ON THE FINGERS BEING POSITIONED IN A BACK-TO-BACK RELATIONSHIP, AND (A) HOOK MEANS HAVING A RING SECTION AND A HOOK SECTION, SAID RING SECTION EXTENDED THROUGH THE SECOND HOLES IN THE LOWER SECTIONS OF THE PLATE MEMBERS WHEREBY WHEN A LOAD IS PLACED ON THE HOOK SECTION THE ADJACENT APEX SECTIONS OF THE PLATE MEMBERS FUNCTION AS COMPLEMENTARY FULCRUMS FOR THE RESPECTIVE PLATE MEMBERS FOR MOVING THE UPPER SECTIONS THEREOF IN OPPOSITE DIRECTIONS THEREBY LOCKING THE PLATE MEMBERS ON THE FINGERS.