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Wheel position control for railway maintenance vehicle

  • US 4,534,297 A
  • Filed: 12/02/1982
  • Issued: 08/13/1985
  • Est. Priority Date: 12/02/1982
  • Status: Expired due to Fees
First Claim
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1. In a railway maintenance vehicle of the character adapted to be moved along a pair of underlying railway rails and including vehicle frame means, drivable tire means mounted on said frame means for moving said vehicle relative to ground, flanged rail engaging wheel means laterally between said tire means and supported on said frame means for displacement between first and second positions relative to said frame means, said wheel means in said first position engaging said pair of rails and supporting said vehicle for said tire means to be spaced above ground and supported in suspension from said frame means, whereby the entire weight of said vehicle is supported on said rails by said wheel means, said wheel means in said second position being elevated from said pair of rails for said tire means to engage ground laterally outwardly of each rail of said pair, whereby the entire weight of said vehicle is supported by said tire means, and means to displace said wheel means between said first and second positions, the improvement comprising:

  • means to displace said wheel means to a third position in which said vehicle is supported for maintenance operation, said third position being between said first and second positions and providing for said tire means to engage ground laterally outwardly of each rail of said pair of rails to provide primary lateral support for said maintenance vehicle laterally outwardly of each of said rails and in which third position said wheel means engage said pair of rails to provide a stabilizing force for said maintenance vehicle laterally inwardly of said tire means.

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