Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7317260 | Wind flow estimation and tracking using tower dynamics A turbine control system for a variable speed electrical generator in a wind turbine mounted atop a support tower. The wind turbine converts wind energy into a driving torque applied to the generator. The control system includes a turbine support tower position sens... | 01/08/2008 |
| 7291936 | Submersible electrical power generating plant A self-supporting, submersible generating plant for producing electricity from ocean currents, consisting of two counter-rotating, rear-facing turbines with a plurality of rotor blades extending radially outward from two separate horizontal axis that convey the kine... | 11/06/2007 |
| 7199484 | Water current generator The underwater electrical generator includes a stator core and counter-rotating turbine blades with permanent magnets in the hubs and windings in the core housing. When tethered by the nose of the housing, the water current rotates the turbine blades generating elec... | 04/03/2007 |
| 7105942 | Plant, generator and propeller element for generating energy from watercurrents A plant, generator and rotating member for the production of power from currents in a body of water, comprising a fixedly mounted of floating structure, and a plurality of replaceable generator units (750) supported by the structure and which are driven by th... | 09/12/2006 |
| 7042113 | Hydroelectric generator A hydroelectric generator having a fixed axle, at least one transmission axle parallel to the fixed axle, and a transmission system configured to rotate the transmission axle about the fixed axle and to apply a force to at least one driven member of a device for gen... | 05/09/2006 |
| 7011501 | Energy generating system A system (1) designed to generate energy with the aid of, primarily, sea currents, comprising a rotation body (4) having a front inlet side (2) and a rear outlet side (3), and at least one transfer member (6) connected between the ... | 03/14/2006 |
| 6935832 | Portable power generating devices Portable power generating devices are provided for converting potential energy from flowing water, water current, blowing air or air current to mechanical and/or electrical energy. The potential energy is converted to a rotational movement, and the rotational energy... | 08/30/2005 |
| 6616403 | Floating electric generator A device for obtaining electric power from moving water, made up of a floating cylindrical body having a first end extending to a second end along a cylindrical surface having at least two blades. Each end of the floating cylindrical body is fixedly conne... | 09/09/2003 |
| 6168373 | Dual hydroturbine unit An environmentally non-intrusive multiple turbine unit for adjustable deployment in water. The turbines are captured in a shroud having an integrally formed augmentor ring and ballasting member to improve efficiency. The multiple turbine arrangement effec... | 01/02/2001 |
| 5471098 | Device for connecting flow energy of water into electrical energy A device is located in a body of flowing water and includes a bridge supporting an electrical generator and anchors for holding the bridge stationary with respect to water flowing past that bridge. The device includes a water wheel submerged in the water ... | 11/28/1995 |
| 4897062 | Water walker's propulsion pole The subject pole is used to help propel a person on ski floats or water walkers. Each pole comprises a shaft with a hand grip at the top end and, in order from the bottom end: a small float, a propulsion apparatus and a larger float. The floats are bodies... | 01/30/1990 |
| 4872805 | Water powered device A number of embodiments of water powered devices that are adapted to be positioned in a stream of moving water and which carry water wheels for driving a driven device. The driven device may comprise a generator and a number of embodiments are illustrated... | 10/10/1989 |
| 4820134 | Loop pump A loop pump (1) for pumping liquid, i.e. a pump comprising a pipe (3) or the like embodied in a plurality of turns/loops. The pipe is rotated by a drive source to introduce alternately air and liquid into an inlet (4) and to pump the liquid to a drawing p... | 04/11/1989 |
| 4748808 | Fluid powered motor-generator apparatus A fluid powered motor-generator apparatus includes a generator having a power output and a mechanically driven input. A generally streamlined motor body is rotatably mounted to drive the generator input and includes a plurality of radially extending gener... | 06/07/1988 |
| 4748338 | Ocean wave energy extracting erosion reversal and power generation system An ocean wave energy extracting beach sand erosion reversal and electric power generation system. Moored seaward of the breaker zone it serves the function of beach sand accretion by extracting energy from the waves prior to their breaking thereby lesseni... | 05/31/1988 |
| 4737070 | Water powered device A number of embodiments of water powered devices that are adapted to be positioned in a stream of moving water and which carry water wheels for driving a driven device. The driven device may comprise a generator and a number of embodiments are illustrated... | 04/12/1988 |
| 4636141 | Hydroelectric device A hydroelectric device wherein a water wheel having radial paddle boards is partially submerged in a moving stream of water, and driven by the water current to operate an electric generator. The water wheel has end discs at its respective sides to block e... | 01/13/1987 |
| 4547124 | Impeller for a wind motor An impeller for a windmotor consists of a rigid hub attached to a rotatingly mounted shaft, an outer rim concentric with the hub and a number of radial vanes of a flexible material, such as fabric, stretched between the hub and the rim, whereby their angl... | 10/15/1985 |
| 4491739 | Airship-floated wind turbine A wind turbine, by use of a tethered airship for support, may be designed for the economical recovery of power at heights of 2,000 feet or more above ground, at which height power density in the wind is typically three times the power density available to... | 01/01/1985 |
| 4482110 | Cyclorotor composite aircraft A composite aircraft comprising a system of airfoils rotating about a horizontal axis providing lift and thrust in combination with a lighter-than-air gas containment bag providing bouyant lift; said aircraft being capable of lifting and transporting a lo... | 11/13/1984 |
| 4467218 | Current-driven power generating apparatus A current-driven power generating apparatus including a water wheel having a transversely extending axle on which are fixedly mounted a plurality of paddles. Also mounted on the axially outer ends of this axle are gears. The water wheel is anchored agains... | 08/21/1984 |
| 4317047 | Energy harnessing apparatus An apparatus for harnessing the energy derived from the undulatory motion of a body of water includes an assembly having a buoyancy sufficient for maintaining it afloat in the water, a first structure substantially following multidirectional undulatory mo... | 02/23/1982 |
| 4279603 | Flexible paddle wheel structure A flexible paddle wheel structure comprises a pair of axially spaced wheels, having flexible rims, such as, for example, pneumatic tires, with pairs of radially spaced, transverse, flexible members extending between, and attached to, the rims. A flexible ... | 07/21/1981 |
| 4264276 | Water wheel for exerting flotation and propelling forces A water wheel for providing both flotation and propelling forces. The water wheel includes a disc made up of a pair of side walls spaced apart in their center area and joined at their peripheries to define a cavity. Paddle members are fixed to the outside... | 04/28/1981 |
| 4207026 | Tethered lighter than air turbine The disclosure relates to a wind turbine comprising a lighter than air body affixed to a drive line. Vanes or fins are attached about the body and turn the body in response to air currents acting thereon. This turns the drive line to supply rotational ene... | 06/10/1980 |
| 4205943 | Hydro-electric generator The efficiency of a hydro-electric generator is improved by providing open-ended hollow tubes having influx ends proximate the axis and efflux ends proximate the periphery of a fan-bladed turbine. The jets of water developed by rotation of the fan-bladed ... | 06/03/1980 |
| 4151424 | Apparatus for utilization of energy from fluids Improved apparatus for withdrawing useful energy from a fluent medium, the apparatus comprising supports with tension members spanning the distance between them, foils distributed along the tension member spans, and circular members capable of rotating fr... | 04/24/1979 |
