Locking and adjusting means for crushers and control means therefor

Claim 1

FOR USE WITH A CRUSHER HAVING A MAIN FRAME, A BOWL SCREWTHREADEDLY ADJUSTABLE IN RELATION TO THE MAIN FRAME AND A HEAD POSITIONED WITHIN THE MAIN FRAME AND GYRATED RELATIVE TO THE BOWL, THE SPACE BETWEEN THE HEAD AND BOWL FORMING A CRUSHING CAVITY, SAID CRUSHER INCLUDING AN ADJUSTMENT SYSTEM INCLUDING YIELDING LOCKING MEANS ADAPTED TO LOCK THE BOWL AGAINST UNINTENDED ROTATION IN RELATION TO THE FRAME, AND FLUIDE OPERABLE UNLOCKING MEANS FOR RELEASING THE BOWL LOCKING MEANS, AND FURTHER INCLUDING FLUID OPERABLE ADJUSTEMENT MEANS FOR MOVING THE BOWL, A FLUID ACTUATING UNITARY CIRCUIT WHICH INCLUDES PUMP MEANS ADAPTED TO BE PUT IN CIRCUIT WITH THE UNLOCKING MEANS AND WITH THE FLUID OPERABLE ADJUSTING MEANS FOR MOVING THE BOWL, AND A PRESSURE SEQUENCE VALVE IN SAID FLUID CIRCUIT CONNECTED TO SAID UNLOCKING MEANS AND CONNECTED BETWEEN THE PUMP MEANS AND THE FLUID OPERABLE ADJUSTING MEANS, SAID PRESSURE SEQUENCE VALVE BEING ARRANGED TO OPEN AND PERMIT OPERATION OF SAID ADJUSTING MEANS AT A PRESSURE SUFFICIENT TO INSURE PRIOR OPERATION OF SAID UNLOCKING MEANS.