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US 3,995,720 AGranted
Truck damping
AssigneeA. Stuck, Company
InventorDonald Wiebe
Life of this patent
Estimating the term…
Abstract
A method of damping relative movement between components of a railway car and more particularly a method of damping such movement which is operable only when the railway car is normally operating in a loaded condition.
Claims10
A method of damping relative movement between components of a railway car which is selectively operable in a loaded and unloaded condition and wherein a closed hydraulic damping system having relatively movable portions is located within a spring group normally supporting such components, comprising the steps of:
- maintaining at least one of said portions out of operative engagement with the adjacent one of said components such that said hydraulic damping system is in standby to damp said relative movement when said railway car is normally operating in said unloaded condition;
- and damping said relative movement by maintaining operative engagement of both of said portions with respective adjacent ones of said components when said railway car is normally operating in said loaded condition.
Dependencies are inferred from the claim text.