US PATENT SUBCLASS 411 / 94
.~.~.~.~ Special fishplate engaging inwardly facing surface

Current as of: June, 1999
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411 /   HD   EXPANDED, THREADED, DRIVEN, HEADED, TOOL-DEFORMED, OR LOCKED-THREADED FASTENER

81  DF  THREADED FASTENER LOCKED TO A DISCREET STRUCTURE (E.G., PLATE, RAIL, WHEEL) {13}
90  DF  .~ Member extending between and engaging flat formed on side of each of a plurality of bolts or nuts (e.g., side lock) {5}
92  DF  .~.~ Having plural openings or notches engaging a bolt or nut on two sides {3}
93  DF  .~.~.~ Having plural parts, one of which engages the inwardly facing surface of a bolt head or nut {2}
94.~.~.~.~ Special fishplate engaging inwardly facing surface

DEFINITION

Classification: 411/94

Special fishplate engaging inwardly facing surface:

(under subclass 93) Device wherein that one of the pieces which has an area contacted by the inwardly facing surface comprises a fishplate associated with a joint between two railroad rails, which fishplate has been modified as to become, itself, one of the coacting pieces.

(1) Note. This subclass notes that a fishplate is treated as comprising only substructure, because the fishplate modifications found herein could not be ignored.

(2) Note. On the other hand, "modified" is not intended to include such commonly occurring fishplate features as (a) a cavity extending longitudinally of the rail-facing side of the fishplate or (b) a notch or equivalent provision, located along a tie-confronting lower lip of a fishplate, for receiving a hold-down spike.

(3) Note. The alteration to the fishplate occasionally is merely the provision therein of a tapped opening for receiving a bolt which retains another one of the pieces to the fishplate.