Method and apparatus for controlling railway truck hunting and a railway car body supported thereby
AssigneeHansen Inc.
InventorsJames F. Wright, Aubra D. McKisic
Life of this patent
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Abstract
A method and apparatus for controlling relative movement such as rotary movement between a railway truck and a car body supported thereby to control truck hunting through application of reaction forces resisting such rotary movement which are effective primarily to resist higher velocity relative rotational movements.
Claims11
In a fluid flow regulating apparatus for controlling a flow of fluid between a pair of fluid containing spaces which are connected by a fluid flow path, said fluid flow regulating apparatus comprising:
- a pair of flow regulating assemblies adapted to be disposed in series relationship with respect to each other in such a fluid flow path with each said flow regulating assembly forming a part of such a fluid flow path;
- each said flow regulating assembly having a restricted flow orifice means adapted to restrict fluid flow through such a fluid flow path between such fluid containing spaces;
- each said flow regulating assembly further having check valve means adapted to limit unrestricted fluid flow within the respective said flow regulating assembly to flow in only one direction;
- pressure relief means adapted to relieve the pressure of fluid within such a fluid flow path between such fluid containing spaces when the pressure differential between such fluid containing spaces exceeds a given pressure;
- and said pressure relief means comprising a single relief valve means communicating in fluid pressure relief relation between such pair of fluid containing spaces and such fluid flow path intermediate said pair of flow regulating assemblies.
In a fluid flow regulating apparatus for controlling a flow of fluid between a pair of fluid containing spaces defined on axially opposed sides of a piston which is slidably disposed within a cylinder, and which spaces are connected by a fluid flow path, said fluid flow regulating apparatus being carried entirely by said piston and comprising:
- a pair of flow regulating assemblies adapted to be disposed in series relationship with respect to each other in such a fluid flow path with each said flow regulating assembly forming a part of such a fluid flow path;
- each said flow regulating assembly having a restricted flow orifice means adapted to restrict fluid flow through such a fluid flow path between such fluid containing spaces;
- each said flow regulating assembly further having check valve means adapted to limit unrestricted fluid flow within the respective said flow regulating assembly to flow in only one direction;
- and
- pressure relief means adapted to relieve the pressure of fluid within such a fluid flow path between such fluid containing spaces when the pressure differential between such fluid containing spaces exceeds a given pressure.
Dependencies are inferred from the claim text.