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US 4,135,456 AGranted
Powered railway car steering assembly
AssigneePullman Incorporated
InventorPatrick G. Welsh
Life of this patent
Estimating the term…
Abstract
A railway car includes a central steering axle transversely movable on the car body in response to track curvature. Actuating members connected to the transversely movable axle include longitudinally extensible and retractable elements which steer end axle assemblies about vertical pivot axes, the actuating members and associated elements including helical gearing.
Claims12
A railway car having a body,
- a drive motor means to power said car, a pair of first axles including flanged drive wheels mounted on said first axles,
- means connected said first axles at opposite ends of said body for pivotal steering movement of said first axles about vertical axis,
- a second axle having flanged wheels positioned on said body between said first axles,
- means connecting said second axle to said body for relative transverse guiding movement;
- the improvement of a steering arrangement for said first axles comprising:
- two pairs of longitudinally extending and laterally spaced telescoping actuating members,
- means pivotally connecting first ends of each of said pairs of actuating members to said second axle,
- means connecting the other ends of said respective pairs of actuating members to said first axles, and
- each actuating member being operatively inter-reactive with the others whereupon transverse guiding movement of said second axle urges extension of one of said pairs and corresponding retraction of the other in response to track curvature to provide relative steering movement to said first axles and drive wheels in relation to the curve.
6 more elements
Dependencies are inferred from the claim text.