Portable collapsible tower for fluid tanks and the like

Claim 1

A PORTABLE COLLAPSIBLE TOWER COMPRISING A NORMALLY SUBSTANTIALLY HORIZONTAL BASE FRAME HAVING FRONT AND REAR ENDS AND A LOWER GROUND ENGAGING SIDE, FRONT AND REAR SUPPORTING LEGS AT THE UPPER SIDE AND ADJACENT SAID FRONT AND REAR ENDS, RESPECTIVELY, OF SAID FRAME, SAID LEGS HAVING LOWER ENDS ADJACENT SAID FRAME AND UPPER ENDS REMOTE FROM SAID FRAME, A CONNECTING MEMBER EXTENDING BETWEEN THE UPPER ENDS OF SAID LEGS, PIVOTAL CONNECTIONS BETWEEN SAID FRAME AND THE LOWER ENDS OF SAID LEGS, PIVOTAL CONNECTIONS BETWEEN SAID MEMBER AND THE UPPER ENDS OF SAID LEGS, SAID PIVOTAL CONNECTIONS HAVING NORMALLY HORIZONTAL, SUBSTANTIALLY PARALLEL PIVOT AXES WHEREBY SAID LEGS ARE ROTATABLE FORWARDLY AND UPWARDLY RELATICE TO SAID FRAME TO ERECT POSITIONS OVER THE FRAME AND REARWARDLY AND DOWNWARDLY RELATIVE TO SAID FRAME TO COLLAPSED POSITIONS WHEREIN SAID REAR LEGS EXTEND REARWARDLY OF SAID FRAME, MEANS FOR RELEASELY RETAINING SAID LEGS IN SAID ERECT POSITIONS, GROUND WHEELS MOUNTED ON THE REAR SIDES OF SAID REAR TOWER LEGS INTERMEDIATE THE ENDS THEREOF IN SUCH MANNER THAT SAID TOWER IS COLLAPSIBLE FROM ITS ERECT POSITION THROUGH AN INTERMEDIATE POSITION WHEREIN SAID FRAME RESTS FLAT ON THE GROUND AND SAID WHEELS ENGAGE THE GROUND REARWARDLY OF SAID FRAME, AND SAID FRAME IS COLLAPSIBLE BEYOND SAID INTERMEDIATE POSITION TO A FINAL POSITION BY ROTATION OF SAID REAR LEGS ABOUT THE ROTATION AXIS OF SAID WHEELS AS A CENTER IN A DIRECTION TO ELEVATE THE REAR END OF SAID FRAME OUT OF SUPPORTING CONTACT WITH THE GROUND, AND MEANS FOR RETATINING SAID TOWER IN SAID FINAL POSITION, THUS TO PERMIT MOVEMENT OF THE TOWER FROM ONE LOCATION TO ANOTHER.