Neutrally buoyant submerged system using lesser density...

Details Neutrally buoyant submerged system using lesser density... Neutrally buoyant submerged system using lesser density...

2011-08-02

2011-08-02

Olson, Lars A (Department: 3617)

Ships

Submersible device

Having attitude control

C114S121000

Reexamination Certificate

active

07987805

ABSTRACT:
The invention provides a means by which the attitude or orientation of a submerged object can be changed or altered using a fixed quantity of transferable ballast fluid which has a density less than that of the surrounding fluid in which the object is submerged. In one embodiment, the process utilizes a static negatively buoyant material (which could be a lead weight) to offset the net negative buoyancy of the transferable ballast fluid. In this way, the total overall buoyancy of the system does not change, but by transferring ballast fluid into expandable reservoirs which are physically separated from the static negatively buoyant material, the separation between the center of buoyancy and the center of mass of the object can be changed, and thus the attitude or orientation of the object, if it is unrestrained, may be changed.

REFERENCES:
patent: 2887977 (1959-05-01), Piry
patent: 3343511 (1967-09-01), Hinton et al.
patent: 3379156 (1968-04-01), Keays
patent: 3437065 (1969-04-01), Robbins, Jr.
patent: 4448145 (1984-05-01), Hervieu
patent: 5309857 (1994-05-01), Brosseuk

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