Compacting press

Claim 1

A COMPACTING PRESS FOR METAL POWDERS AND THE LIKE COMPRISING A VERTICALLY RECIPROCABLE DIE HAVING A VERTICAL BORE EXTENDING THERETHROUGH FOR THE RECEPTION OF A POWDER TO BE COMPACTED, A VERTICALLY RECIPROCABLE PUNCH ADAPTED TO BE FORCED INTO THE UPPER END OF SAID BORE, AN EJECTOR PLUNGER HAVING ITS UPPER END EXTENDING INTO THE LOWER END OF SAID BORE TO PROVIDE A BOTTOM SURFACE AGAINST WHICH POWDER IS COMPACTED, MEANS FOR LIMITING DOWNWARD MOVEMENT OF THE EJECTOR PLUNGER BEYOND A POINT WHERE ITS UPPER END EXTENDS INTO THE BORE, HYDRAULIC CYLINDER MEANS FOR MOVING SAID EJECTOR PLUNGER UPWARDLY FROM SAID POINT INTO THE BORE AT THE COMPLETION OF A COMPACTING OPERATION TO FORCE A COMPACTED MASS OUT OF THE TOP OF THE BORE, SAID HYDRAULIC CYLINDER MEANS HAVING AN OUTER CYLINDER CLOSED AT ITS BOTTOM AND OPEN AT ITS TOP, MEANS CONNECTING SAID OUTER CYLINDER TO SAID PUNCH WHEREBY IT WILL RECIPROCATE WITH THE PUNCH, A PISTON MEMBER RECEIVED WITHIN THE OPEN TOP END OF SAID OUTER CYLINDER AND RECIPROCABLE THEREIN ABOVE A COLUMN OF SUBSTANTIALLY NONCOMPRESSIBLE FLUID, MEANS CONNECTING SAID PISTON MEMBER TO THE EJECTOR PLUNGER, MEANS FOR INCREASING THE VOLUME OF SAID COLUMN OF NON-COMPRESSIBLE FLUID WHEN THE PUNCH AND OUTER CYLINDER MOVE DOWNWARDLY, MEANS FOR PREVENTING THE VOLUME OF SAID COLUMN OF NON-COMPRESSIBLE FLUID FROM DECREASING WHEN SAID PUNCH AND OUTER CYLINDER MOVE UPWARDLY, AND MEANS INCLUDING TELESCOPING CYLINDERS CONTAINING A COMPRESSIBLE FLUID CONNECTING SAID PISTON MEMBER TO THE DIE.