Brake system with twin fluid-supply networks

Claim 1

IN A BRAKE INCLUDING A ROTATABLE MEMBER A NONROTATABLE STRUCTURE COMPRISING AT LEAST ONE NONROTATABLE FRICTION ELEMENT SUPPORTED ON EACH SIDE OF SAID ROTATABLE MEMBER AND MOVABLE RELATIVELY THERETO INTO FRICTIONAL ENGAGEMENT WITH A CONFRONTING SURFACE OF SAID ROTATABLE MEMBER, A FLUID PRESSURE OPERATED MECHANISM FOR EFFECTING FRICTIONAL ENGAGEMENT BETWEEN SAID FRICTION ELEMENTS AND THEIR OPPOSED CONFRONTING SURFACES PROVIDED BY SAID ROTATABLE MEMBER, SAID MECHANISM INCLUDING TWO PRESSURERESPONSIVE THRUST DEVICES ONE ON EACH SIDE OF SAID ROTATABLE MEMBER AND ASSOCIATED ONE WITH EACH OF SAID FRICTION ELEMENTS AND EACH HAVING A RESPECTIVE SOURCE OF FLUID PRESSURE WHICH IS INDEPENDENTLY OPERABLE TO APPLY THE BRAKE THROUGH ITS ASSOCIATED INDIVIDUAL THRUST DEVICE, SAID THRUST DEVICES HAVING A MECHANICAL INTERCONNECTION THEREBETWEEN BY A YOKE EXTENDING ON OPPOSITE SIDES OF SAID ROTATABLE MEMBER, SAID YOKE INCLUDING A PAIR OF CYLINDERS, ONE ON EACH SIDE OF SAID ROTATABLE MEMBER, AND BEING AT LEAST PARTIALLY SUPPORTED BY A PIVOT MEMBER FOR SWINGING MOVEMENT IN A PLANE TRANSVERSE TO SAID ROTATABLE MEMBER WHEREBY REACTION THRUST IS TRANSMITTABLE BETWEEN SAID THRUST DEVICES TO EFFECT MOVEMENT OF SAID FRICTION ELEMENTS INTO ENGAGEMENT WITH THE ROTATABLE MEMBER, SAID THRUST DEVICES EACH HAVING A VARIABLE LENGTH DEVICE FOR ADVANCING ITS RESPECTIVE FRICTION ELEMENT TOWARDS ITS CONFRONTING DISC SURFACE WHEREBY SUPPLY OF FLUID TO ONLY ONE THRUST DEVICE IS EFFECTIVE FOR COMMUNICATING A REACTION THRUST TO THE THRUST DEVICE NON-OPERATIVE BY ITS ASSOCIATED SOURCE OF FLUID PRESSURE AND THEREBY EFFECTING FRICTIONAL ENGAGEMENT BETWEEN BOTH SAID FRICTION ELEMENTS AND THEIR RESPECTIVELY CONFRONTING SURFACES OF SAID ROTATABLE MEMBER.