Spiderless gyratory crusher with relief valve system

Claim 1

IN A SPIDERLESS GYRATORY CRUSHER HAVING A FRAME, A VERTICAL CRUSHER POST SLIDABLY SUPPORTED BY SAID FRAME, AN OVERHANGING CONCAVE RING HORIZONTALLY SUPPORTED IN A FIXED POSITIONED WITHIN THE UPPER PORTION OF SAID FRAME CONCENTRICALLY ABOVE SAID CRUSHER POST, A CRUSHER HEAD MOUNTED ON TOP OF SAID CRUSHER POST WITH A STEP BEARING ASSEMBLY THEREBETWEEN AND DISPOSED WITHIN THE SPACE DEFINED BY THE CONCAVE RING, A HYDRAULICALLY OPERATED PISTON ASSEMBLY SUPPORTING THE LOWER END OF SAID CRUSHER POST AND CRUSHER HEAD TO VARY THE OPENING DEFINED BETWEEN SAID CONCAVE RING AND SAID CRUSHER HEAD, A CHECK VALVE FOR RELEASING THE HYDRAULIC SUPPORT FROM SAID PISTON ASSEMBLY UPON A SUDDEN INCREASE IN PRESSURE, AN ECCENTRIC SLEEVE MEMBER ROTATABLY SUPPORTED ON SAID FRAME CONCENTRICALLY AROUND SAID CRUSHER POST, A SKIRT MEMBER RIGIDLY SUPPORTED TO SAID CRUSHER HEAD AND EXTENDING DOWNWARD TO ENGAGE THE ECCENTRIC CIRCUMFERENCE OF SAID ECCENTRIC MEMBER AND TO FORM A CONICAL CHAMBER BETWEEN SAID CRUSHER HEAD AND SAID ECCENTRIC MEMBER, AND A MEANS FOR ROTATING SAID ECCENTRIC SLEEVE MEMBER, IN COMBINATION THEREWITH, THE IMPROVEMENT COMPRISING: VALVE MEANS FOR QUICKLY RELEASING THE HYDRAULIC PRESSURE IN SAID CONICAL CHAMBER UPON A SUDDEN INCREASE IN SAID PRESSURE, AND VALVE MEANS FOR SLOWLY RELEASING EXCESSIVE HYDRAULIC PRESSURE IN SAID CONICAL CHAMBER WHENEVER SAID PRESSURE EXCEEDS A PREDETERMINED VALUE.