Locking hook

Claim 1

A LOCKING HOOK, COMPRISING: A BODY MEMBER HAVING A ROOT AND A SIDE WALL FORMING TWO SIDES OF A HOOK OPENING; A LOCKING MEMBER; MEANS MOUNTING SAID LOCKING MEMBER ON SAID BODY OPPOSITE TO SAID SIDE WALL FOR LIMITED ROTATIONAL MOVEMENT BETWEEN FIRST AND SECOND ROTATIONAL POSITIONS RELATIVE TO SAID BODY MEMBER ABOUT AN AXIS PARALLEL TO THE AXIS OF SAID HOOK OPENING AND FOR LIMITED MOVEMENT RELATIVE TO SAID BODY MEMBER BETWEEN FIRST AND SECOND POSITIONS TRANSVERSE TO THE AXIS OF ROTATION OF SAID LOCKING MEMBER; SAID LOCKING MEMBER HAVING FIRST AND SECOND PORTIONS THEREON, SAID FIRST PORTION BEING DISPOSED ADJACENT SAID ROOT AND MOVABLE THERETOWARDS UPON ROTATION OF SAID LOCKING MEMBER TO ITS FIRST ROTATIONAL POSITION AND SAID SECOND PORTION BEING DISPOSED ADJACENT SAID ROOT OPENING AND MOVABLE TOWARDS SAID SIDE WALL UPON ROTATION OF SAID LOCKING MEMBER TO ITS SECOND ROTATIONAL POSITION; MEANS PERMITTING SAID LOCKING MEMBER TO ROTATE BETWEEN ITS FIRST AND SECOND ROTATIONAL POSITIONS WHEN SAID LOCKING MEMBER IS IN ITS FIRST TRANSVERSE POSITION; MEANS PERMITTING SAID LOCKING MEMBER TO MOVE BETWEEN ITS FIRST AND SECOND TRANSVERSE POSITIONS WHEN SAID LOCKING MEMBER IS IN ITS SECOND ROTATIONAL POSITION; MEANS POSITIVELY PREVENTING ROTATION OF SAID LOCKING MEMBER FROM ITS SECOND TO ITS FIRST ROTATIONAL POSITION WHEN SAID LOCKING MEMBER IS IN ITS SECOND TRANSVERSE POSITION; MEANS URGING SAID LOCKING MEMBER TOWARDS ITS SECOND TRANSVERSE POSITION WHEN SAID LOCKING MEMBER IS IN ITS SECOND ROTATIONAL POSITION; MANUALLY OPERABLE MEANS FOR MOVING SAID LOCKING MEMBER FROM ITS SECOND TO ITS FIRST TRANSVERSE POSITION; AND MEANS FOR RELEASABLY HOLDING SAID LOCKING MEMBER IN ITS FIRST ROTATIONAL POSITION WHEN SAID LOCKING MEMBER HAS BEEN ROTATED TO ITS FIRST ROTATIONAL POSITION.