ENERGY ABSORBERS

摘要

A railway buffer capsule comprising a hollow cylindrical plunger (10) slidably mounted in a cylinder (11). The cylinder (11) is closed at one end (12). The plunger (10) is closed at its outer end (13), and in its inner end (15) is formed a fixed area orifice (21) of flow restricting dimension. A floating piston (17) slides in the bore of the plunger (10) and separates a liquid reservoir (18) from the remainder of the interior of the plunger (10) which comprises a gas containing space (19). A stepped piston (25) has its larger diameter exposed to pressure in the reservoir (18) and its smaller diameter end adapted to seat and close the orifice (21) and be exposed to the compression chamber pressure. The combination of the stepped piston (25) and the orifice (21) is a multiplier valve which multiplies the resistance of the compressed gas to lengthwise compression of the buffer.