US PATENT SUBCLASS 246 / 455
.~ Outer-tread-supported wheel

Current as of: June, 1999
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246 /   HD   RAILWAY SWITCHES AND SIGNALS

454  DF  CROSSINGS, FROGS, AND MATES {11}
455.~ Outer-tread-supported wheel

DEFINITION

Classification: 246/455

(under subclass 454) Subject matter having crossings, frogs and mates in which an outer rail member with riser ends is employed, upon which the unguttered or rim portion of the wheel-tread runs, thereby obviating the jolting due to guttered wheels.

SEE OR SEARCH THIS CLASS, SUBCLASS:

421, 432 and 469, for switch and crossing risers.