Drive assembly for the mobile equipment of hydraulic presses, and suited for exerting pressures of various intensities

Claim 1

IN A PRESS ASSEMBLY HAVING A FIXED PLATEN AND A MOVABLE TABLE DISPOSED FOR RECIPROCATING TOWARD AND AWAY FROM SAID FIXED PLATEN COMPRISING A FIXED SUPPORT STRUCTURE, GUIDE MEANS FIXED TO SAID STRUCTURE TO PERMIT SAID MOVABLE TABLE TO SLIDE THEREALONG, SAID MOVABLE TABLE SLIDABLY CARRIED BY SAID GUIDE MEANS AND HAVING AN OPENING THEREIN, AT LEAST TWO RECIPROCATING PISTON DRIVE MEANS FIXED TO SAID STRUCTURE FOR SLIDING SAID TABLE ALONG SAID GUIDE MEANS IN A RECTILINEAR DIRECTION, SAID TWO PISTON MEANS BEING DISPOSED PARALLEL TO EACH OTHER, ONE OF SAID PISTON MEANS HAVING ITS LOWER END SECURED TO SAID TABLE TO RECIPROCATE IT ALONG SAID GUIDE MEANS, THE OTHER OF SAID TWO PISTON MEANS BEING DISPOSED IN ALIGNMENT WITH SAID TABLE OPENING TO PASS THROUGH IT, AND LOCKING MEANS FIXED ON SAID TABLE TO SECURE THE LOWER END OF SAID OTHER PISTON MEANS TO SAID TABLE TO INCREASE THE DRIVING FORCE ACTING AGAINST SAID TABLE, AND MEANS OPERATIVELY CONNECTED TO SAID PISTON MEANS FOR INDEPENDENTLY ACTUATING EACH OF THEM, WHEREBY SAID OTHER PISTON MEANS CAN EXTEND THROUGH SAID OPENING AND COOPERATE WITH SAID FIXED PLATEN INDEPENDENTLY OF SAID MOVABLE TABLE.