Hollow structural member

Details Hollow structural member Hollow structural member

1994-10-17

1998-02-17

Dye, Rena

Stock material or miscellaneous articles

Hollow or container type article

428 369, 428178, 428188, 138 28, 138 30, 138119, 138148, 180 78, 180311, 244117R, 137383, F16L 1100, F16L 1115

Patent

active

057189528

ABSTRACT:
A stiff elongated hollow structural member has a double-walled structure in the shape of a tube made of an interior tube which has an annular cross-section and an exterior tube which has a different cross-section, in a concentric arrangement. The interior and exterior tubes bound a hollow space filled with an incompressible liquid. Responsive to pressure increases in the liquid, the exterior tube in the elastic material range is bendingly deformable in the direction of a ring-circular cross-section or to a ring-circular cross-section. This hollow structural member can be used as an adjustable stiffness torsion member such as a vehicle steering shaft. Another disclosed adjustable stiffness hollow structural member includes a flat plate facing a corrugated plate to form a hollow space for the incompressible liquid. Increases in pressure of the liquid forces the corrugated member to a more flattened configuration.

REFERENCES:
patent: 3201861 (1965-08-01), Fromson et al.
patent: 3720235 (1973-03-01), Schrock
patent: 3880193 (1975-04-01), Lewis
patent: 4427033 (1984-01-01), Ege
patent: 4650471 (1987-03-01), Tamari
patent: 4651781 (1987-03-01), Kandelman
patent: 4823844 (1989-04-01), Bartholomew
patent: 5054185 (1991-10-01), Usui et al.

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