Transfusion equipment

Claim 1

AN AUTOMATIC SHUT-OFF DEVICE FOR USE WITH A TRANSFUSION CONTAINER COMPRISING: A BODY HAVING A SLOT-LIKE OPENING; A PIVOT ROTATABLY MOUNTED IN SAID BODY; A SUPPORT ARM ATTACHED TO SAID PIVOT, EXTENDING OUTWARDLY THROUGH SAID SLOT-LIKE OPENING AND BEING MOVABLE IN SAID SLOT-LIKE OPENING BY ROTATION AROUND SAID PIVOT; MEANS ON SAID SUPPORT ARM OUTWARDLY OF SAID BODY FOR ATTACHING A TRANSFUSION CONTAINER THEREON; A FIRST TOGGLE ARM RIGIDLY ATTACHED TO THE SUPPORT ARM AT SAID PIVOT AND EXTENDING LATERALLY FROM SAID SUPPORT ARM; A SECOND PIVOT IN SAID BODY; A SECOND TOGGLE ARM ATTACHED TO SAID FIRST TOGGLE ARM BY A MOVABLE JOINT, SAID SECOND TOGGLE ARM SLIDABLY ENGAGING THE SECOND PIVOT; A PORTION OF SAID SECOND TOGGLE ARM EXTENDING BEYOND SAID SECOND PIVOT; AND SPRING MEANS MOUNTED ON SAID SECOND TOGGLE ARM PORTION, ONE END OF SAID SPRING MEANS ENGAGING SAID SECOND PIVOT AND THE OTHER END BEING SUBSTANTIALLY FIXED AT THE TERMINAL END OF SAID SECOND TOGGLE ARM PORTION, SAID BODY INCLUDING A TUBE-RECEIVING SEAT DISPOSED IN INTERSECTING RELATION TO THE PIVOTAL PATH OF SAID SUPPORT ARM; WHEREBY IN THE "OPEN" CONDITION OF THE SHUT-OFF DEVICE, THE SPRING MEANS ACTING ON THE SAID TOGGLE ARMS PROVIDES A MOMENT URGING THE SUPPORT ARM TO PIVOT AROUND SAID FIRST PIVOT IN ONE DIRECTION, WHILE THE WEIGHT OF BOTH THE TRANSFUSION CONTAINER AND ITS CONTENTS ACTING ON SAID SUPPORT ARM PROVIDES A MOMENT URGING SAID SUPPORT ARM TO PIVOT IN THE REVERSE DIRECTION, AND IN THE "CLOSED" CONDITION OF SAID SHUT-OFF DEVICE, THE WEIGHT OF BOTH THE TRANSFUSION CONTAINER AND ITS CONTENTS, AND THE SPRING MEANS ACTING ON SAID TOGGLE ARMS PROVIDE MOMENTS URGING SAID SUPPORT ARM TO PIVOT AROUND SAID FIRST PIVOT IN A REVERSE DIRECTION.