kautz

Claim 1

AN OVERLOAD RELEASE MECHANISM COMPRISING: AN ACCUMULATOR HAVING A FLOATING PISTON THEREIN DIVIDING THE SAME INTO TWO COMPARTMENTS, THE SAID ACCUMULATOR BEING ADAPTED IN CONTAIN LIQUID IN ONE COMPARTMENT THEREOF AND GAS IN THE OTHER; A CYLINDER HAVING A DOUBLE ACTING PISTON THEREIN, THE SAID PISTON DIVIDING SAID CYLINDER INTO A FORWARD COMPARTMENT AND A REAR COMPARTMENT, THE LATTER OF WHICH IS ADAPTED TO CONTAIN LIQUID AND THE SAID PISTON BEING MOUNTED ON A PISTON ROD ADAPTED TO BE CONNECTED TO A MOVABLE FORCE APPLYING PART OF A FORCE APPLYING MACHINE; A MAIN HYDRAULIC RESERVOIR, THE SAID RESEVOIR BEING CONNECTED BY A VALVED PIPE TO THE FORWARD COMPARTMENT OF SAID CYLINDER, AND A UNITARY COMBINED CHECK AND RESISTOR VALVE ADAPTED TO AUTOMATICALLY AND FREELY PASS LIQUID THERETHROUGH IN ONE DIRECTION AND TO AUTOMATICALLY RESTRICT THE PASSAGE OF LIQUID THERETHROUGH IN THE OPPOSITE DIRECTION, ONE END OF SAID VALVE BEING CONNECTED TO THE REAR LIQUID COMPARTMENT OF SAID CYLINDER AND THE OPPOSITE END OF SAID VALVE BEING ADAPTED TO BE CONNECTED TO THE LIQUID COMPARTMENT OF SAID ACCUMULATOR, THE ARRANGEMENT BEING SUCH THAT THE POSITION OF THE PISTON IN SAID CYLINDER AND CORRESPONDINGLY THE ADJUSTMENT OF THE FORCE APPLYING PART OF THE FORCE APPLYING MACHINE MAY BE ADJUSTED TO PREDETERMINED POSITIONS BY ADMITTING LIQUID FROM THE RESERVOIR TO THE FORWARD COMPARTMENT ONLY OF SAID CYLINDER AND SUCH THAT UPON OVERLOAD RELEASE WHEN THE PISTON IS FORCED BACKWARDLY BY THE MOVABLE PART OF THE FORCE APPLYING MACHINE, ONLY THE LIQUID IN THE REAR COMPARTMENT OF THE CYLINDER WILL BE FORCED AND PASS FREELY THROUGH THE SAID CHECK AND RESISTOR VALVE INTO THE LIQUID COMPARTMENT OF THE ACCUMULATOR WHERE IT WILL FORCE THE FLOATING PISTON IN THE ACCUMULATOR BACKWARDLY AND COMPRESS THE GAS THEREIN AND, UPON OVERLOAD RELIEF OF PRESSURE IN THE CYLINDER, THE COMPRESSED GAS IN THE ACCUMULATOR WILL SLOWLY RETURN LIQUID FROM THE LIQUID COMPARTMENT OF THE ACCUMULATOR BACK THROUGH SAID VALVE ONLY TO THE REAR LIQUID COMPARTMENT OF THE CYLINDER.