Booms for cranes or the like

Details Booms for cranes or the like Booms for cranes or the like

1982-08-18

1985-01-22

Murtagh, John E.

Static structures (e.g., buildings)

Openwork; e.g., truss, trellis, grille, screen, frame, or...

Side-by-side terminus shafts; e.g., truss

52731, E04C 332

Patent

active

044943512

ABSTRACT:
A boom for a crane or the like which comprises four longitudinal stiffening members interconnected with four substantially flat longitudinal plates in such a way that the boom has a substantially diamond shaped cross-section. Such a construction has considerable advantages as compared with normal rectangular section booms, e.g., reduction of stress at the corners, elimination of internal fillets, reduction of distortion and easier and better construction of the boom.

REFERENCES:
patent: 1392496 (1921-10-01), Hain
patent: 1431521 (1922-10-01), Hall
patent: 1691818 (1928-11-01), Krass
patent: 3066394 (1962-12-01), Litzka
patent: 4003168 (1977-01-01), Brady
patent: 4109440 (1978-08-01), Bill
patent: 4171597 (1979-10-01), Lester et al.
patent: 4171598 (1979-10-01), Holmes

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