Railcar mover having negative cambered rail wheels
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United States of America Patent
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Jul 20, 2004
Grant Date -
May 20, 2004
app pub date -
Nov 15, 2002
filing date -
Nov 15, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A dual use roadway or railroad travel vehicle such as a railcar mover (10) which includes an inner set (24) of wheel assemblies (28, 30) designed for alternate roadway or rail travel, together with fore and aft rail wheel assemblies (32, 34) which may be alternately retracted for roadway travel or lowered for rail travel. The wheel assemblies (32, 34) each have a pair of rail wheels (36, 38) mounted spindles (48) so that the rotational axes A of the wheels (36, 38) are oriented at an oblique angle .alpha. of less than 6.degree. relative to the horizontal H; this wheel orientation, together with a rail wheel geometry including a rim surface (40, 42) parallel with the associated rotational axis A and a reduced radius of curvature R between the rim surface (40, 42) and the flange (44, 46), significantly decreases the problem of rail wheel climb encountered with conventional movers (10), while also reducing flange wear.
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