Modular section mast

Details Modular section mast Modular section mast

1977-07-18

1979-01-16

Perham, Alfred C.

Static structures (e.g., buildings)

Mechanism operated relatively movable shaft assembly

Tilts relative to base

52632, 52745, E04H 1234

Patent

active

041342372

ABSTRACT:
A multiple section mast having telescoping modular sections adapted to be erected at remote land sites or on offshore platforms by small capacity cranes. A separate lower mast section having an open side is first placed in vertical position on a substructure. A separate upper mast section is moved horizontally into the lower mast section then elevated vertically to extend above the lower mast section. A separate intermediate mast section having at least part of one side open is then moved horizontally into the lower mast section and fastened to the lower end of the upper mast section. The upper and intermediate mast sections are then simultaneously elevated until the lower end of the intermediate mast section can be fastened to the upper end of the lower mast section. Retainer means removably attached to the lower mast section extend into the open side engaging the upper and intermediate sections as they are telescoped.

REFERENCES:
patent: 2331558 (1957-08-01), McEwen et al.
patent: 2508835 (1950-05-01), Moon et al.
patent: 2565777 (1951-08-01), Moon
patent: 2690268 (1954-09-01), Woolslayer et al.
patent: 3016992 (1962-01-01), Wilson

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