Class / Patent application number | Description | Number of patent applications / Date published |
405081000 | Fishway | 15 |
20080213045 | Structure and method for facilitating safe downstream passage of migrating fish around hydroelectric projects - Structure and method for safe downstream passage of juvenile fish of any species around hydroelectric dam projects using a combination of deeply submerged extended turbine intakes and surface-oriented bypass flows near the dam structure. The turbine intakes are extended upstream from the dam face. | 09-04-2008 |
20090317191 | FISH WAY OF TURBINE STRUCTURE AND GATE STRUCTURE FOR TIDAL POWER PLANT - Fishways of turbine structures and gate structures for environmentally-friendly tidal power plant through which fish can pass through are provided. The fishway comprises of sea side fishways and lake side fishways to allow fish to move between the sea side and the lake side by forming inside stuffing space filled with seawater for shorter construction period and concrete reduced placing quantity in a certain section of the vertical middle walls installed on the base of which the bottom part is on the marine rock to form blocks of turbine structures and gate structures in a tidal power plant, and seawater on the sea side and the lake side is flown through the front and rear of such inside stuffing space. | 12-24-2009 |
20100086357 | Fish passes - A fish pass comprises material ( | 04-08-2010 |
20110280661 | FISH PASSAGE APPARATUS WITH VARIABLE INLETS AND METHOD - An improved fish passage apparatus is combined with hydroelectric power generation to facilitate migration of fish between water bodies of different heights with minimal injury or trauma to fish. It may also be optimized for power generation when fish are not moving through it. The fish passage apparatus comprises a variable inlet connected to a connecting tube providing fluid communication between upper and lower water bodies, an upper valve in the connecting tube adapted to control flow of water to or from an upper water body, a lower valve in the connecting tube adapted to control flow of water to or from a lower water body, and a working tube opening into the connecting tube between the upper and lower valves a working portion of which extends functionally vertical to above a water level of the upper body of water and to below a water level of the lower body and is vented at its top such that water can flow freely in and out of the working portion. | 11-17-2011 |
20110280662 | PARALLEL FISH PASSAGE APPARATUSES WITH HYDROELECTRIC POWER GENERATOR AND METHOD - An improved fish passage apparatus is combined with hydroelectric power generation to facilitate migration of fish between water bodies of different heights with minimal injury or trauma to fish. It may also be optimized for power generation when fish are not moving through it. The fish passage apparatus comprises parallel connecting tubes providing fluid communication between upper and lower water bodies, upper valves in each connecting tube adapted to control flow of water to or from an upper water body, lower valves in each connecting tube adapted to control flow of water to or from a lower water body, and working tubes opening into each connecting tube between the upper and lower valves a working portion of which extends functionally vertical to above a water level of the upper body of water and to below a water level of the lower body and is vented at its top such that water can flow freely in and out of the working portion. | 11-17-2011 |
20110280663 | FISH PASSAGE APPARATUS WITH FLOW RESTRICTION AND METHOD - An improved fish passage apparatus is combined with hydroelectric power generation to facilitate migration of fish between water bodies of different heights with minimal injury or trauma to fish. It may also be optimized for power generation when fish are not moving through it. The fish passage apparatus comprises a connecting tube providing fluid communication between upper and lower water bodies, an upper valve in the connecting tube adapted to control flow of water to or from an upper water body, a lower valve in the connecting tube adapted to control flow of water to or from a lower water body, and a working tube opening into the connecting tube between the upper and lower valves a working portion of which extends functionally vertical to above a water level of the upper body of water and to below a water level of the lower body and is vented at its top such that water can flow freely in and out of the working portion. The working tube contains a means for restricting flow thereby increasing the safety to fish passing through the connecting tubes. | 11-17-2011 |
20120003046 | Fish Guidance and Exclusion Barrier - One embodiment of a fish guidance and exclusion barrier having an upper reticulated section ( | 01-05-2012 |
20120009018 | CULVERT LINER - A liner for repairing a culvert includes a substantially semi-cylindrical body having an inside surface and an outside surface. The liner is configured for attachment to an inside surface of a culvert and has a shape corresponding to the inside surface of the culvert. | 01-12-2012 |
20120148344 | Safety Fish Way - A safe fish guide path structure includes a horizontal tube having an intake and exhaust valve for controlling levels of air having lower viscosity than water. The horizontal tube is equipped with a transparent window at both sides about the intake and exhaust valve. The horizontal tube is installed at a weir or a bank. An inclined tube extends horizontally from both sides of the horizontal tube. An extended tube extends horizontally from an end portion of the inclined tube. An inlet tube extends from an end portion of the extended tube toward an upper side, while communicating with the extended tube, with water flowing through the inlet tube. A cover has an insertion groove at one side into which the extended tube is inserted, and a cut-away groove at the other side for water to flow through the cutaway groove. | 06-14-2012 |
20130236249 | SYSTEM AND METHODS FOR BYPASSING AN AQUATIC OBSTRUCTION - The system and methods of the present invention selectively permit aquatic organisms to bypass an obstruction, such as a lock or a dam. Certain embodiments of the system include a container through which aquatic organisms and water may flow, a container pressurizer for pressurizing the container, and a pressure control mechanism. | 09-12-2013 |
20160017558 | Aquatic Animal Passage With Counter - A device for counting animal traffic in an aquatic animal passage system includes chutes positioned across the aquatic animal passage system and a sensor positioned to sense an animal moving through or in the aquatic animal passage system. The chutes and the aquatic animal passage system are formed with precast concrete segments and may include a protective liner or coating coupled to their outer surface to protect animals from contacting the outer surface of the precast concrete segments. The sensors may be integrated with the precast concrete segments forming the chutes. Smart concrete segments may be employed as transducers to create an electric field in the chutes, with impedance sensors coupled to the transducers being responsive to changes to the electric field in the chutes caused by passing animals. | 01-21-2016 |
20160024735 | Helical eel ramp - A helical eel ramp spirals vertically with a plurality of turns and has a ramp surface with a ramp entrance on a bottom portion of the helical ramp, a ramp exit on a top portion of the helical ramp, a radial inner edge, and a radial outer edge. An outer barrier is connected along the radial outer edge of the helical and extends upward from the radial outer edge to retain liquid flow on the ramp surface. An inner barrier connected along the radial inner edge of the helical ramp also extends upward from the radial inner edge to retain liquid flow on the ramp surface. The ramp surface, outer barrier, and inner barrier define a channel configured to direct a liquid to flow from the ramp exit to the ramp entrance. | 01-28-2016 |
405082000 | Elevator | 1 |
20160201283 | TRANSPORTER AND FISH LOCK | 07-14-2016 |
405083000 | Closed channel | 2 |
20140356070 | Fish Levitation System - A levitation system communicates fish mutually exclusively upstream and downstream, with minimal trauma to fish, in harmony with their homing instinct and natural levitation process, in discrete micro-steps aggregated in macro steps, with optimally adjusted water flows, through capsules of stations differing in elevation by 50 to 100 feet, connected through inclined conduits in series and in parallel. The process starts with electricity from a utility to pump water from the forebay to the dam crest. Water moves slowly in controlled cascades through stations from crest to the afterbay. Surplus electricity is generated as pressure is adjusted at each station. Cooler water drawn from below the surface of the forebay is blended at stations along the passageway and spent water is flushed. Energy losses are attributable mainly to attraction flow at the station a few feet above the afterbay and are mitigated by a moderate negative pressure to control flow. | 12-04-2014 |
20160076212 | Arrangement on Flowing Bodies of Water - An arrangement on flowing bodies of water in the area of a transverse structure and/or water structure, in the form of a fish migration bypass ( | 03-17-2016 |