Disc brake

Claim 1

A DISC BRAKE, COMPRISING: A SUPPORT; A SHAFT JOURNALLED ON SAID SUPPORT FOR ROTATION ABOUT AN AXIS; A BRAKE DISK KEYED TO SAID SHAFT FOR AXIAL DISPLACEMENT RELATIVELY THERETO AND ROTATABLE ENTRAINMENT THEREBY ABOUT SAID AXIS WHILE HAVING A PAIR OF OPPOSITE BRAKING SURFACES EXTENDING GENERALLY TRANSVERSELY THERETO; A YOKE RIGID WITH SAID SUPPORT EXTENDING AROUND THE OUTER PERIPHERY OF SAID DISK; A PAIR OF BRAKE SHOES EXTENDING WITHIN SAID YOKE PARALLEL TO SAID SURFACES ON OPPOSITE SIDES OF SAID DISK AND JUXTAPOSED WITH RESPECTIVE ONES OF SAID BRAKING SURFACES FOR FRICTIONAL ENGAGEMENT THEREWITH; A PAIR OF GENERALLY PARALLEL SPACED-APART PINS REMOVABLY MOUNTED IN SAID YOKE AND EXTENDING PARALLEL TO SAID AXIS OUTWARDLY OF THE PERIPHERY OF SAID DISK WHILE PROJECTING AXIALLY BEYOND SAID SURFACES, EACH OF SAID BRAKE SHOES LYING RADIALLY INWARDLY OF SAID PINS WITH RESPECT TO SAID AXIS IN SLIDING ENGAGEMENT WITH SAID PINS AND BEING CONSTRAINED THEREBY TO MOVE IN A DIRECTION PERPENDICULAR TO SAID SURFACES, SAID SHOES BEING WITHDRAWABLE FROM SAID YOKE IN A DIRECTION TRANSVERSE TO SAID AXIS UPON REMOVAL OF SAID PINS, AT LEAST ONE OF SAID PINS DEFINING A PIVOTAL AXIS PARALLEL TO THE AXIS OF ROTATION OF SAID DISK WHEREBY SAID SHOES CAN BE SWUNG OUT OF SAID YOKE ABOUT SAID PIVOTAL AXIS UPON AT LEAST PARTIAL REMOVAL OF THE OTHER OF SAID PINS, SAID YOKE HAVING A BIGHT PORTION DISPOSED RADIALLY OUT-