(under subclass 159) Apparatus including a bridging member bridging the gap between the adjacent track links or including means consisting of parallel spaced tubularly formed pivot bearing sleeves extending transversely of the track for rigidly connecting the track shoes to the frame members.
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41+, for a resilient connector between treads.
59, for a metallic noncylindrical or hollow connector pin.
SEE OR SEARCH CLASS
59, Chain, Staple, and Horseshoe Making,
5+, for a sprocket chain making; subclasses 84+ for chain links making; and subclass 900 for a plastic chain or link making. [figure] [caption]A - Pivot bearing sleeves; B - Pivot pins; C - Rubber bushings; D - Connecting web; E, F - Rubber block with wheel contacting face; G, H - Bottom tread shoe with a metal plate "H"; J - Grouser or cleat; K - Fastening means for recurring metal plate with tread block
