Extendable structures

Details Extendable structures Extendable structures

1982-06-17

1984-11-06

Murtagh, John E.

Static structures (e.g., buildings)

Striplike unit, reversibly flexible and rigid

52121, 52632, 52645, 244159, E04H 1218

Patent

active

044804156

ABSTRACT:
An extendable open frame boom structure 10 includes three longerons 11 which when the boom is extended lie in spaced parallel relationship to define three planes, A, B, C and a series of frame elements 12, arranged at intervals along the length of the boom interconnecting the longerons. Between each pair of adjacent frame elements 12, each longeron comprises a pair of foldable rod members 13, hinged at each end to a frame element. The hinges are arranged so that on movement to a stowed condition, each pair of rod members moves within one of the three planes, A, B or C. A boom system is also disclosed which includes a boom structure 10, housing 18 and a drive mechanism for moving the frame elements 12 one after another between stowed and elongate conditions.

REFERENCES:
patent: 3593481 (1971-07-01), Mikulin
patent: 3611652 (1971-10-01), Rabenhorst
patent: 3751863 (1973-08-01), Lyons
patent: 4446662 (1984-05-01), Humphries

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