Stop brake

Claim 1

IN A FLUID OPERATED BRAKE HAVING A CYLINDER BODY, AN ANNULAR CYLINDER IN SAID BODY, AN ANNULAR PISTON IN SAID ANNULAR CYLINDER MOVABLE AXIALLY ALONG SAID ANNULAR CYLINDER, A HUB COAXIAL WITH SAID ANNULAR CYLINDER AND PISTON AND DISPOSED ADJACENT THERETO, MEANS FOR MOUNTING SAID CYLINDER BODY AND HUB FOR RELATIVE ROTATION AND FRICTION MEMBERS BETWEEN SAID PISTON AND HUB, THE COMBINATION OF (A) A PLURALITY OF CYLINDERS EXTENDING LONGITUDINALLY IN SAID ANNULAR PISTON PARALLEL TO THE AXIS THEREOF, AND OPEN AT ONE END, (B) A PLURALITY OF BOLTS, ONE FOR EACH CYLINDRICAL CYLINDER AND DISPOSED WITHIN SAID CYLINDERS, (C) SAID BOLTS HAVING SHANKS OF LESSER DIAMETER THAN THE DIAMETERS OF SAID CYLINDERS TO PROVIDE ANNULAR SPACES THEREBETWEEN, (D) CYLINDRICAL GUIDE MEANS CARRIED BY SAID ANNULAR PISTON CONCENTRIC WITH THE CYLINDERS AND AT THE ENDS THEREOF OPPOSITE THE OPEN ENDS AND A LESSER DIAMETER THAN SAID CYLINDERS AND SLIDABLE ALONG THE SHANKS OF SAID BOLTS, (E) HEADS ON SAID BOLTS SERVING AS PISTONS AND SLIDABLE ALONG SAID CYLINDERS, (F) SAID BOLT HEADS HAVING ANNULAR GROOVES EXTENDING THROUGH THE OUTER SURFACES THEREOF, (G) SEALING RINGS IN SAID GROOVES ENGAGING THE SURFACES OF SAID CYLINDERS, (H) COMPRESSION COIL SPRINGS IN SAID ANNULAR SPACES ACTING BETWEEN SAID GUIDE MEANS AND BOLT HEADS TO MOVE SAID ANNULAR PISTON INWARDLY INTO SAID ANNULAR CYLINDER TO DISENGAGE SAID FRICTION MEMBERS, (I) SAID GUIDES AND PISTONS RESTRAINING RELATIVE ROTATIONAL MOVEMENT BETWEEN SAID ANNULAR PISTON AND CYLINDER BODY.