Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent
1975-06-27
1977-01-18
Faw, Jr., Price C.
Static structures (e.g., buildings)
Mechanism operated relatively movable shaft assembly
Tilts relative to base
52731, D12 57, D12 60, B66T 1100, E04H 1234
Patent
active
040031683
ABSTRACT:
To reduce the weight of a construction crane boom without materially lessening the lifting capacity thereof where the boom sections have an inverted trapezoidal cross sectional shape, a series of openings is formed in the two side plates of each boom section and such openings are provided with internal reinforcing rings or braces. The bottoms of the reinforcing rings are arranged in stress-transferring relation to the boom section side plates and adjacent longitudinal vertical reinforcing plates or stiffeners provided in the structure. Cooperating side plate brace bars arranged between the reinforced side plate openings have their lower ends attached to the longitudinal side plate stiffeners.
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Braun Leslie
Faw Jr. Price C.
Walter Kidde & Company, Inc.
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