Variable buoyancy buoy

Details Variable buoyancy buoy Variable buoyancy buoy

1993-12-30

1995-10-24

Avila, Stephen

Buoys, rafts, and aquatic devices

Buoy

With means to call buoy to surface

441 21, 441 32, B63B 2206

Patent

active

054605563

ABSTRACT:
A variable buoyancy buoy includes a shell and expansion apparatus. The two are combined in a manner to provide a watertight structure with an internal region wherein a constant pressure is maintained that is substantially equal to the pressure at a predetermined depth below the water surface. At depths above the predetermined depth the internal pressure is greater than the external water pressure. This differential pressure causes the buoy to expand, thereby increasing its buoyancy.

REFERENCES:
patent: 2718016 (1955-09-01), Henke
patent: 3189922 (1965-06-01), Margot et al.
patent: 3257672 (1966-06-01), Meyer et al.
patent: 3520263 (1970-07-01), Berry et al.
patent: 3631551 (1972-01-01), Miller
patent: 3680160 (1972-08-01), Heikki
patent: 5073136 (1991-12-01), De Witt et al.

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