CARRIER TRACK ASSEMBLY FOR EXTENSIBLE AND RETRACTABLE BOOM MACHINES

摘要

CARRIER TRACK ASSEMBLY FOR EXTENSIBLE AND RETRACTABLE BOOM MACHINES A carrier track assembly for extensible and retractable boom machines wherein the carrier track assembly is positioned within the telescopic boom sections and has one end connected to the extension and retraction fluid cylinder in the base boom section and the opposite end connected to the inner end of the next adjacent extensible and retractable boom section, the carrier track assembly being supported by the extension and retraction fluid cylinder when the boom section are fully extended. An elevated support member is secured to the fluid cylinder at a position between the inner end of the base boom section and the end connection of the carrier track assembly on the fluid cylinder, the carrier track assembly being reversely bent upon itself and supported by the elevated support member when the boom sections are fully retracted.