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Class Information
Number: 417/337
Name: Pumps > Motor driven > Buoyant motor
Description: Apparatus in which the motor has a buoyant movable working member which member is positioned in a container for liquid, said container being alternately filled and emptied so as to move the buoyant member up and down or said buoyant member being alternately filled and emptied so as to move up and down.

Patents under this class:

Patent Number Title Of Patent Date Issued
8628303 Wave energy converter Jan. 14, 2014
8308449 Wave energy converter Nov. 13, 2012
8148840 Ocean wind water pump for de-energizing a storm Apr. 3, 2012
8102068 Buoyant in-stream hydro turbine Jan. 24, 2012
7980832 Wave energy converter Jul. 19, 2011
7963750 Hydraulic pump Jun. 21, 2011
7464546 Water-powered generator Dec. 16, 2008
4726188 Motor utilizing buoyancy forces Feb. 23, 1988
4720976 Method of power generation and its apparatus utilizing gravitation force and buoyancy Jan. 26, 1988
4691513 Rotary power transducer system Sep. 8, 1987
4599857 Method of power generation and its apparatus utilizing gravitation force and buoyancy Jul. 15, 1986
4497173 Power transducer system Feb. 5, 1985
4415314 Metering pump Nov. 15, 1983
4309154 Pumps operated by the rise and fall of water Jan. 5, 1982
4265599 Hydropneumatic energy system May. 5, 1981
4218192 Pressure source Aug. 19, 1980
4208875 Apparatus for obtaining useful work from wave energy Jun. 24, 1980
4207741 Power source using cyclically variable liquid level Jun. 17, 1980
4184807 Reversible hydraulic engine Jan. 22, 1980
4158780 Power generation systems in buoyant structures Jun. 19, 1979
4081962 Dynamic wave energy extraction system Apr. 4, 1978
4074526 Pressure source and systems incorporating it Feb. 21, 1978
4048512 System for generating power from wave motions of the sea Sep. 13, 1977
3961480 Pressure source and systems incorporating it Jun. 8, 1976
3952517 Buoyant ram motor and pumping system Apr. 27, 1976
3934964 Gravity-actuated fluid displacement power generator Jan. 27, 1976

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