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Browse by Category: Main > Transportation & Automotive
Class Information
Number: 441/29
Name: Buoys, rafts, and aquatic devices > Buoy > Having means to control attitude or position > Having ballast means > Variable ballast
Description: Buoy wherein the ratio of heavy material to buoyancy producing agent may be varied.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8647014 Buoy systems and methods for minimizing beach erosion and other applications for attenuating water surface activity Feb. 11, 2014
8387703 Tube buoyancy can system Mar. 5, 2013
8381672 Systems and methods for compensating for compressibility and thermal expansion coefficient mismatch in buoyancy controlled underwater vehicles Feb. 26, 2013
8340844 Undersea position and velocity measuring system and process Dec. 25, 2012
8047297 System for and method of restraining a subsurface exploration and production system Nov. 1, 2011
7841917 Floatation device Nov. 30, 2010
7837525 Autonomous data relay buoy Nov. 23, 2010
7699677 Profiling float and usage of the profiling float Apr. 20, 2010
7455561 Sinkable buoy system for use with a water sports course Nov. 25, 2008
7244156 Lightweight marine buoy and method of handling the same Jul. 17, 2007
7112111 Closed loop buoyancy system Sep. 26, 2006
6971934 Autonomous liquid filled buoy Dec. 6, 2005
6916219 Remote sampling system Jul. 12, 2005
6824289 Beverage accessory device Nov. 30, 2004
6592416 Target for naval gunfire Jul. 15, 2003
6463800 Energy conserving moored buoyant ocean profiler Oct. 15, 2002
6406624 Flocculation apparatus and apparatus for floating upwardly in a liquid and for moving downwardly in the liquid under the influence of gravity Jun. 18, 2002
6142092 Depth control device Nov. 7, 2000
5911542 Unsinkable floating dock system Jun. 15, 1999
5887538 Sailboard for a wind powered sailing apparatus Mar. 30, 1999
5865663 Toy submarine ballast system Feb. 2, 1999
5816874 Remote underwater sensing station Oct. 6, 1998
5655938 Variable buoyancy ballast and flotation unit for submerged objects or structures Aug. 12, 1997
5516317 System to sink and float buoys May. 14, 1996
5320568 Swimming pool animal escape device Jun. 14, 1994
5283767 Autonomous oceanographic profiler Feb. 1, 1994
5273468 Marker buoy Dec. 28, 1993
5257954 Rescue buoy package Nov. 2, 1993
5251571 Submersible cage system for culturing aquatic animals Oct. 12, 1993
5228406 Subsea exploration apparatus Jul. 20, 1993
5197826 Offshore gas flare system Mar. 30, 1993
5129848 Controllable variable depth mooring system and method Jul. 14, 1992
4860487 Multi-cycle sea bed traversing system Aug. 29, 1989
4692906 Ocean bottom seisometer Sep. 8, 1987
4662301 Floating platform for decorative articles May. 5, 1987
4498491 Thermo-electric valve Feb. 12, 1985
4464131 Water ballast compartment for buoyant marine devices Aug. 7, 1984
4443203 Floating marker Apr. 17, 1984
4434650 Hydrocarbon sensor float Mar. 6, 1984
4364325 Passive controlled buoyancy apparatus Dec. 21, 1982
4319372 Submarine rescue cable reel Mar. 16, 1982
4301761 Depth and hover control system for unmanned underwater vehicle Nov. 24, 1981
4266500 Hover control system for a submersible buoy May. 12, 1981
4207828 Stabilizing system for a crane vessel Jun. 17, 1980
4202036 Buoyancy control for ocean characteristic measurement system May. 6, 1980
4202034 Adaptive controller for ocean characteristic measurement system May. 6, 1980
4193057 Automatic deployment of horizontal linear sensor array Mar. 11, 1980
4183316 Variable volume depth control Jan. 15, 1980
4176986 Subsea riser and flotation means therefor Dec. 4, 1979
4170954 Semi-submersible vessel Oct. 16, 1979

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