Rock crusher

Claim 1

IN A CRUSHER, A FRAME, A HEAD GYRATABLE RELATIVE TO SAID FRAME, A BOWL ON SAID FRAME COOPERABLE WITH SAID HEAD TO DEFINE A CRUSHING CHAMBER, AND A FLUID SYSTEM HOLDING SAID BOWL AGAINST SAID FRAME AND OPERABLE TO RELEASE SAID BOWL FOR SEPARATING MOVEMENT RELATIVE TO SAID WHEN NONCRUSHABLE MATERIAL OF A SIZE GREATER THAN SAID CHAMBER IS INTERPOSED BETWEEN SAID HEAD AND BOWL, SAID FLUID SYSTEM INCLUDING A PLURALITY OF PISTON AND CYLINDER UNITS UNIFORMLY DISTRIBUTED CONCENTRICALLY AROUND SAID BOWL AND DISPOSED ABOVE PORTIONS OF SAID BOWL, THE PISTONS OF SAID UNITS PROVIDING DOWNWARDLY FACING SOCKETS AND SAID BOWL PORTIONS PROVIDING OPPOSED UPWARDLY FACING SOCKETS, AND A THRUST PIN FOR EACH PISTON HAVING ROUNDED ENDS FITTING IN THE SOCKET OF THE ASSOCIATED PISTON AND IN THE ASSOCIATED BOWL SOCKET TO TRANSMIT DOWNWARD FORCES FROM SAID PISTON TO SAID BOWL BUT PERMIT SAID BOWL TO TILT UPWARDLY TO PASS NONCRUSHABLE MATERIAL.