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Underfriction

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This is an old revision of this page, as edited by JlACEer (talk | contribs) at 01:54, 28 June 2018 (Undid revision 491084491 by 173.213.128.215 (talk) Patent was issued in 1919). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

A roller coaster wheel assembly. The underfriction wheels are on the bottom. The three sets of wheels clamp onto the track.

On a roller coaster train, the underfriction, up-lift, or up-stop wheels are a device to keep the train from jumping off the track under intense movement. The design was patented in 1919 by John Miller.[1]

References

  1. ^ US patent 1319888, John Miller, "Pleasure railway structure", issued 1919-10-28 
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