Telescopic boom

Details Telescopic boom Telescopic boom

1977-08-29

1979-10-02

Braun, Leslie

Static structures (e.g., buildings)

Mechanism operated relatively movable shaft assembly

Tilts relative to base

74 25, 212 55, 212144, E04H 1234, B66C 2306

Patent

active

041693388

ABSTRACT:
A telescopic boom includes three or more sections which may be pivoted if desired. The innermost section is incapable of moving in the longitudinal direction, whereas the other sections are adapted to be concurrently dislocated in the longitudinal direction relative to each other. Only a drive mechanism on the innermost section is adapted to be actuated from an outside source, whereas the other sections are driven by the relative motion of the sections movable in the longitudinal direction.

REFERENCES:
patent: 301019 (1884-06-01), Teal
patent: 1611326 (1926-12-01), Abbe
patent: 2896750 (1959-07-01), Eitel
patent: 2903949 (1959-09-01), Simmonds
patent: 3097721 (1963-07-01), Thym
patent: 3319803 (1967-05-01), Northcott
patent: 3369670 (1968-02-01), Tourneau
patent: 3722154 (1973-03-01), Sakamoto
patent: 3749254 (1973-07-01), Grider
patent: 3800965 (1974-04-01), Barron et al.
patent: 3807108 (1974-04-01), Johnston
patent: 3889818 (1975-06-01), Wennerstrom
patent: 3913756 (1975-10-01), Barron et al.
patent: 4004695 (1977-01-01), Hockensmith et al.

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