Title: Color coded boom and chart system

Abstract: A color coding system for correlating the stages of a multiple stage, telescoping boom with the corresponding sections of a load chart and boom extension chart. The charts are arranged in separate sections which indicate, for various positions of the boom, the angle of the boom with respect to horizontal, its effective horizontal moment arm, and the maximum load that it can safely handle. The boom stages are each provided with a different exterior color, and the chart sections are colored such that each section is correlated with the boom stage to which it corresponds. Since the colors of the boom stages that are extended are readily visible, the color coding system facilitates reference to the proper sections of the charts and decreases the possibility of human error in reading of the charts.

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Inventors: Pitman, Raymond F. (Johnson County, KS, US)

Application Number: 892948
Filing Date: 1978-04-03
Publication_date: 1980-07-08
Assignee: R O Corporation (Olathe, KS)
Primary Class(es): 212/282 116/284, 116/305, 182/18, 414/698
Other Classes:
US Patent Ref:

1773589	Aug, 1930	Lichtenberg	212/39.
2117442	May, 1938	McWeeny	116/247.
2589896	Mar, 1952	Toland	116/285.
2808017	Oct, 1957	Killibrew	116/28.
3011261	Dec, 1961	Riley	116/299.
3389678	Jun, 1968	Fenwick	116/335.
3824947	Jul, 1974	Honkaranta et al.	116/335.

Other Refs: 20329681347580

Jan, 1972	DE
Feb, 1974	GB

Primary Examiner: Yasich, Daniel M.
Assistant Examiner:
Attorney: Lowe, Kokjer, Kircher, Wharton & Bowman