Improvements in and relating to disc brakes

• Main Author: TAYLOR WALTER ROBERT
• Format: Patent
• Language: English
• Published: 27.10.1965
• Subjects: BLASTING; BRAKES; CLUTCHES; COUPLINGS FOR TRANSMITTING ROTATION; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

1,008,073. Disc brakes. AUTOMOTIVE PRODUCTS CO. Ltd. Dec. 14, 1962 [Dec. 22, 1961], No. 46013/61. Heading F2E. A disc brake having at least one pair of opposed pads for engagement with opposite faces of a disc has brake applying means comprising two or more cylinders of which at least one is arranged at each side of the disc, the cylinders being associated with movable members which are slidably or pivotally mounted, and are so arranged in relation to the cylinders and pads, that both pads are applied whether fluid is supplied to only one of the cylinders or to both cylinders simultaneously. In one embodiment, Fig. 1, the movable members consist of superposed plates 6, 7 of U-shape which are slidable on flanges 3 of an underlying fixed support, guided by bolts 8 on the flanges 3 engaging slots 9 in the members. A cylinder 13 is secured to the closed end 11 of member 6 and its piston 15 acts on backing plate 21 of one pad 19 arranged adjacent one face of a disc 4, and another cylinder is secured between the limbs of member 6 so as to abut the backing plate 21 of another pad 20, its piston 16 engaging the closed end 12 of member 7. The peripheral portion of the disc engaged by the pads is partially accommodated in cut-outs 5 in the underlying support, and openings 24 are provided in the plates 6, 7 for this purpose and also to provide abutment surfaces 25, 26, for engagement with plates 21 of the pads 20, 19, respectively. As a result, when fluid is applied to cylinder 13 alone, piston 15 applies pad 19 and the reaction acts via member 6 on the pad 20, while if fluid is supplied to cylinder 14 alone pad 20 is applied directly and the reaction acts via piston 16 and member 7 on the pad 19. Fluid can be supplied to both cylinders when greater braking force is required. In a modification (Fig. 3, not shown), cylinder 14 is reversed so that its piston faces the pad 20, the cylinder body being then secured to the closed end 12. In a further modification, Fig. 5, the movable members are superposed plates of closed loop form supported on flanges 29 of an underlying support and pivotally mounted on one of the flanges 29. The arrangement and operation is otherwise similar to that of Fig. 3. Specifications 996,612 and 998,726 are referred to.