Cargo container and lifting equipment therefor

Claim 1

CARGO HANDLING EQUIPMENT COMPRISING: (A) A HOISTING IMPELLENT COMPRISING: (1) A FRAME MEMBER; (2) A FLAT LIFTING LATCH PIVOTALLY MOUNTED ON THE FRAME FOR MOVEMENT ABOUT A HORIZONTALL AXIS, SAID LATCH EXTENDING DOWNWARDLY FROM THE MEMBER; AND (3) A GUIDE ARM EXTENDING DOWNWARDLY FROM SAID MEMBER IN PROXIMITY TO THE LATCH (B) A CARGO CONTAINER COMPRISING A SOCKET INTEGRALLY CONTAINED IN AN UPPER CORNER PORTION OF THE CONTAINER AND DEFINING A POCKET WHICH OPENS ALONG THE NORMALLY TOP AND OUTER SIDE SURFACES OF THE CONTAINER TO AN EXTENT ENABLING THE HORIZONTAL AND VERTICAL PASSAGE OF THE LATCH AND THE GUIDE ARM INTO THE POCKET WHEN THE LATCH AND THE ARM ARE BACK-TOBACK: (C) SAID LATCH AND SAID POCKET HAVING OPPOSITELY FACING S-SHAPED SURFACES PROVIDING A DOWNWARDLY-EXTENDING SOCKET CONVEXITY ON THE POCKET WALL AND AN DOWNWARDLY-EXTENDING CONCAVITY ON THE LATCH RENDERING THE SOCKET AND LATCH INTERLOCKABLE; (D) SAID GUIDE BEING DISPOSED IN SPACED RELATION WITH THE LATCH WHEN THE LATCH IS INTERLOCKED WITH SAID CONVEXITY, SAID LATCH BEING PIVOTABLE AGAINST THE ARM TO FUNCTION AS A BACK STOP THEREFORM AND TO FACILITATE ENTRY INTO THE POCKET; SAID ARM AND SAID LATCH, WHEN ENGAGED, CONSTITUTING A GUIDING MEANS ENABLING THE IMPELLENT TO EFFECT HORIZONTAL SELF-ALIGNING MOVEMENTS WITH A CONTAINER WHEN COUPLING THEREWITH.