| 摘要 |
<p>328,307. Boughton, E. B., Emmott, W., and Brock, D. T., (trading as Automotive Products Co.). Jan. 25, 1929. Divided on 328,305. Fluid-pressure. - Relates to fluidpressure braking systems more particularly for motor vehicles of the kind comprising two separate systems each complete in itself but operated by a common lever and rendered interdependent by means which ensures equal pressures in the systems and which, should one system fail, ensures the other system remaining operative. Each system is arranged to operate on more than one pair of wheels. In one modification for a four-wheeled vehicle each wheel is provided with two pairs of brake shoes and each system operates one set of brake shoes associated with all four wheels. In another modification for a six-wheeled vehicle the two systems, comprising a pressure-producing device 10 and a pipe system 9, each operate one pair of brake shoes on the front wheels 3 and the brakes on one pair of rear wheels 4 or 21. The devices 8, 10 are operated by a lever 11. The systems are connected by a balancing device 12 comprising a cylinder connected at the ends to the two systems and having a centrally arranged piston, limited in axial movement by stops integral with the ends of the cylinder. In alternative arrangements each brake shoe may be operated by two or more pressureoperated devices connected in different systems. Each system may operate the brakes on one diagonally arranged pair of wheels. Specifications 280,502, 298,100, and 328,305 are referred to. According to the Provisional Specification a construction is described in which one system operates the front wheel brakes and the other system operates the rear wheel brakes.</p> |
