GB305455A - Improvements in hydraulic brakes or shock-absorbing devices, such as railway vehiclebuffers - Google Patents

Abstract

305,455. Rheinische Metallwaarenund Maschinenfabrik. Feb. 4, 1928, [Convention date]. Buffers. - In an hydraulic shock-absorbing device, such as a railway vehicle buffer, of the kind in which liquid is displaced from a containing chamber c1 on one side of a piston d to a reservoir chamber c2 on the opposite side, the reservoir chamber is made concentric with the piston and the containing chamber but of a diameter so much greater than that of the latter chamber that the containing chamber may be completely filled with liquid and at the same time there, may be left above the level of the liquid in the reservoir chamber a free air space c3 of a volume more than sufficient to accommodate the fluid displaced by that portion of the piston-rod e entering the chamber c2 during the working stroke. In the construction shown the invention is applied to a vehicle buffer in which a plunger b, piston d, piston-rod e and liquid-containing casing c are inserted as a unit in an outer casing a, a spring h bearing on a head g on the pistonrod returning the parts to normal position.