Spot type disc brakes

Claim 1

A DISC BRAKE COMPRISING A ROTATABLE DISC, A STATIONARY MEMBER MOUNTED ON A FIXED PART AND LOCATED ON ONE SIDE ONLY OF THE DISC, A DOUBLE-ENDED HYDRAULIC CYLINDER INCORPORATED IN THE STATIONARY MEMBER WITH ITS AXIS PARALLEL TO THAT OF THE DISC, A SUBSTANTIALLY RIGID YOKE MOUNTED ON THE STATIONARY MEMBER AND FITTING OVER AN ADJACENT PORTION OF THE PERIPHERY OF THE DISC, CO-OPERATING GUIDE MEANS ON SAID YOKE AND STATIONARY MEMBER AND WHOLLY ON ONE SIDE OF THE DISC FOR GUIDING THE YOKE FOR MOVEMENT IN A DIRECTION PARALLEL TO THE AXIS OF THE DISC, A FIRST-FRICTION PAD LOCATED BETWEEN THE STATIONARY MEMBER AND THE ADJACENT FACE OF THE DISC, SECOND CO-OPERATING GUIDING MEANS ON SAID FRICTION PAD AND THE STATIONARY MEMBER, ALL OF SAID SECOND GUIDING MEANS BEING ENTIRELY INDEPENDENT OF AND LATERALLY SPACED FROM SAID FIRST MENTIONED GUIDING MEANS BUT ON THE SAME SIDE OF THE DISC THEREAS FOR GUIDING THE FRICTION PAD TOWARDS AND AWAY FROM THE DISC AND FOR TAKING ALL OF THE DRAG ON THE FRICTION PAD WHEN THE BRAKE IS APPLIED, A FIRST PISTON WORKING AT ONE END OF SAID HYDRAULIC CYLINDER AND ADAPTED TO BEAR ON THE FIRST FRICTION PAD TO URGE IT INTO ENGAGEMENT WITH THE DISC, A SECOND FRICTION PAD LOCATED ON THE OPPOSITE SIDE OF THE DISC FROM THE FIRST PAD, AN ENGAGEMENT BETWEEN SAID SECOND FRICTION PAD AND THE YOKE, AND A SECOND PISTON WORKING AT THE OTHER END OF THE HYDRAULIC CYLINDER AND ADAPTED TO BEAR ON THE YOKE TO MOVE IT IN A DIRECTION OPPOSITE TO THAT IN WHICH THE FIRST FRICTION PAD IS MOVED AND TO BRING THE SECOND FRICTION PAD INTO ENGAGEMENT WITH THE DISC.