Locking mechanism for cone crushers and the like

Claim 1

IN A GYRATORY CRUSHER, A MAIN CIRCUMFERENTIAL FRAME, AN ADJUSTMENT RING RELEASABLY MOUNTED ON THE MAIN FRAME, A BOWL SCREW-THREADED INTO THE ADJUSTMENT RING, A HEAD MOUNTED IN THE FRAME FOR GYRATORY MOVEMENT DEFINING A CRUSHING CAVITY WITH THE BOWL, A RELEASE BETWEEN THE MAIN FRAME AND ADJUSTMENT RING FOR ALLOWING THE BOWL TO RELEASE WHEN UNCRUSHABLE MATERIAL PASSES THROUGH THE CRUSHING CAVITY, A PLURALITY OF FLUID PISTON AND CYLINDER ASSEMBLIES SPACED ABOUT THE BOWL AND EFFECTIVE BETWEEN THE ADJUSTMENT RING AND BOWL TO APPLY AN UPTHRUST TO THE BOWL TO REMOVE THREAD CLEARANCE BETWEEN THE BOWL AND ADJUSTMENT RING, EACH PISTON HAVING A STROKE SUFFICIENT TO APPLY AN UPTHRUST TO THE BOWL AT ALL POSITIONS OF ADJUSTMENT OF THE BOWL, A FLUID SYSTEM FOR SUPPLYING FLUID UNDER PRESSURE TO THE ASSEMBLIES, AS A GROUP, TO PROVIDE AN UPTHRUST TO THE BOWL, A TOP CAP ROTATABLY MOUNTED ON THE ADJUSTMENT RING RISING ABOVE THE BOWL, AND A KEY CONNECTION BETWEEN THE TOP CAP AND BOWL SUCH THAT THE BOWL MAY MOVE VERTICALLY RELATIVE TO THE TOP CAP BUT IS INTERLOCKED ROTATABLY TO IT, THE PISTON AND CYLINDER ASSEMBLIES BEING MOUNTED ON THE TOP CAP, THE PISTON ROD OF EACH CYLINDER EXTENDING DOWN THROUGH THE TOP CAP AND BEING CONNECTED TO THE BOWL.