(under subclass 185) Apparatus in which a complete track tread is formed in one piece.
(1) Note. To be classified under this definition the complete tread as finally assembled to form the track must be made in one piece, either cast, molded, machined or bent into shape from a single piece of sheet metal.
SEE OR SEARCH THIS CLASS, SUBCLASS:
47+, for one-piece treads provided with means to prevent track sag.
50, for one-piece treads which are adapted to be secured to each other without the use of separate fasteners.
