Spreading type disc brake

Claim 1

IN A BRAKE STRUCTURE A PAIR OF OPPOSED RELATIVELY ROTATABLE AND AXIALLY SHIFTABLE ACTUATING DISCS HAVING PERIPHERAL MARGINS SUBSTANTIALLY DEFINED BY A CIRCLE HAVING A FIRST DIAMETER, MEANS BETWEEN SAID ACTUATING DISCS FOR AXIALLY SHIFTING THE DISCS UPON RELATIVE ROTATION THEREOF, SAID DISCS RESPECTIVELY INCLUDING EARS PROJECTING LATER ALLY OF PERIPHERAL MARGINS THEREOF AT CIRCUMFERENTIALLY SPACED LOCATIONS AND HAVING OUTER ENDS INTERSECTING AN IMAGINARY CIRCLE CONCENTRIC WITH AND HAVING A DIAMETER GREATER THAN SAID FIRST MENTIONED CIRCLE, AND FLUID PRESSURE OPERABLE MEANS INCLUDING PISTON AND CYLINDER MEMBERS DISPOSED BETWEEN SAID EARS FOR ACTUATING SAID DISCS, ONE OF SAID PISTON AND CYLINDER MEMBERS BEARING AGAINST SAID PERIPHERAL MARGIN OF ONE OF SAID DISCS BETWEEN SAID EARS AND THE OTHER OF SAID PISTON AND CYLINDER MEMBERS BEING OPERATIVELY CONNECTED WITH SAID EARS AT A LOCATION SUBSTANTIALLY BETWEEN SAID FIRST AND SECOND MENTIONED CIRCLES SO THAT UPON OPERATION OF THE FULID PRESSURE MEANS SAID OTHER OF SAID PISTON AND CLYINDER MEMBERS IS SHIFTED LATERALLY OUTWARDLY WITH RESPECT TO SAID DISCS FOR SHIFTING SAID EARS RELATIVE TO EACH OTHER AND THEREBY RELATIVELY ROTATING SAID DISCS.