Crane boom and telescopic section for it

Details Crane boom and telescopic section for it Crane boom and telescopic section for it

1978-06-07

1979-10-23

Braun, Leslie

Static structures (e.g., buildings)

Mechanism operated relatively movable shaft assembly

Tilts relative to base

52632, 52731, 212144, E04H 1234

Patent

active

041715977

ABSTRACT:
A section for a telescopically extensible crane is octagonal in cross-section. The section has relatively thick upper and lower parallel plates, and side members each having a part inclined outwardly for each of the upper and lower plates and a central part generally perpendicular to the upper and lower plates. The central part of each side member may extend over more than half the height of the boom section and the inclined sections may be of differing lengths and thus inclined at different angles to the respective upper and lower plates. Preferably, the lower inclined sections are shorter than the upper inclined sections. The boom section may be reinforced by external belts, or by internal support plates.

REFERENCES:
patent: 2031549 (1936-02-01), Ruff
patent: 2763342 (1956-09-01), French
patent: 2920725 (1960-01-01), Emmons
patent: 3196990 (1965-07-01), Handley
patent: 3571991 (1971-03-01), Dooey et al.
patent: 3610433 (1971-10-01), Milner
patent: 3690408 (1972-09-01), Reske et al.
patent: 3708937 (1973-01-01), Sterner
patent: 3802136 (1974-04-01), Eiler et al.
patent: 3952466 (1976-04-01), Spain
patent: 3985234 (1976-10-01), Jouffray
patent: 4003168 (1977-01-01), Brady
patent: 4038794 (1977-08-01), Young

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