Trash bin with fork arm latching dogs

Claim 1

A TRASH BIN FOR USE WITH A SERVICE VEHICLE OF THE TYPE HAVING A TRASH RECEIVER AND A FORK LIFT DEVICE WITH SPACED FORK ARMS FOR ELEVATING SAID BIN FROM ITS NORMAL UPRIGHT POSITION OF USE TO AN INVERTED POSITION OF ELEVATION OVER SAID TRASH RECEIVER TO EMPTY TRASH FROM SAID BIN INTO SAID RECEIVER, SAID TRASH BIN COMPRISING: A LOWER RECTANGULAR CONTAINER ADAPTED TO BE STRADDLED ENDWISE BY SAID FORK ARMS AND INCLUDING A BOTTOM WALL BOUNDED BY USTANDING SIDE AND END WALLS, UPPER THRUST SHOULDERS AT THE END, RESPECTIVELY, OF SAID CONTAINER HAVING DOWNWARDLY PRESENTED SHOULDER SURFACES DISPOSED FOR SUPPORTING ENGAGEMENT WITH SAID FORK LIFT ARMS WHEN SAID TRASH BIN OCCUPIES ITS NORMAL UPRIGHT POSITION, LOWER THRUST SHOULDERS AT THE ENDS, RESPECTIVELY, OF SAID CONTAINER BELOW SAID UPPER THRUST SHOULDERS AND HAVING UPWARDLY PRESENTED SHOULDER SURFACES, MEANS SUPPORTING SAID LOWER THRUST SHOULDERS ON SAID CONTAINER FOR MOVEMENT IN GENERALLY ENDWISE DIRECTIONS OF SAID CONTAINER BETWEEN INNER RETRACTED POSITIONS WHEREIN