Class 415/24 - Responsive to liquid level or weight

Subclass of Class 415 - Rotary kinetic fluid motors or pumps
Definition: Apparatus in which the condition sensed is the level of
No. of patents: 32
Last issue date: 01/29/2008

Number	Title	Issue Date
7322189	Wide bandwidth farms for capturing wave energy Disclosed herein is a system comprising a central controller; and a plurality of devices for capturing wave energy and converting into another form of energy; wherein the central controller is in operative communication with the plurality of devices to adjust an ene...	01/29/2008
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
6533536	Hydro-turbine runner A turbine installation comprising a turbine in combination with an electrical closed-loop control system. The turbine is disposed in a flow of water for producing electrical energy. The turbine includes a hollow hub and a plurality of runner blades pivota...	03/18/2003
6402477	Adjustable blade turbines A turbine, adaptable to improve the survivability of fish present in water flowing therethrough, includes a hub and associated runner blades. Each blade comprises an inner edge and a distal outer edge, a leading edge and a trailing edge separated by a wat...	06/11/2002
6398484	Centrifugal compressor and shaft seal A shaft seal system prevents working gas in a centrifugal compressor from leaking outside from the compressor. The shaft seal system is of an oil film seal type and located in the compressor in which a plurality of centrifugal impellers are fitted on a si...	06/04/2002
6042331	Pump-turbine An upper reservoir-side conduit or a lower reservoir-side conduit is branched in the vicinity of pump-turbine ends and at least a first pump-turbine out of a plurality of pump-turbines which share the conduit portions located farther than the branch point...	03/28/2000
5984626	Evacuation means for pumps The present invention is for an evacuation system which preferrably in its entirety is connected to and operates at the outlet side of a pump. The evacuation system is connected to the socket 5 by the connector 9 and one of the valves 15 or 16. In the eva...	11/16/1999
5954474	Hydro-turbine runner A turbine, disposed in water flowing therethrough, includes a hub and associated runner blades. Each blade comprises an inner surface and a distal outer surface, a leading edge and a trailing edge separated by a water directing surface. Each blade is rota...	09/21/1999
5947679	Adjustable blade turbines A turbine, adaptable to improve the survivability of fish present in water flowing therethrough, includes a hub and associated runner blades. Each blade comprises an inner edge and a distal outer edge, a leading edge and a trailing edge separated by a wat...	09/07/1999
5868550	Pump assembly A pump assembly, comprising a pump with a chamber having a vacuum region therein, a priming fluid reservoir, a suction line for fluid communication between the vacuum region and a fluid source, and a priming suction line for fluid communication between th...	02/09/1999
5520510	Mechanism for preventing back-flow for pump discharge pipes A mechanism for preventing back-flow for a discharge pipe of a pump. The discharge pipe terminates in a container and essentially runs vertically upward. A bell-shaped hood is turned over the exit opening of the discharge pipe so as to form a low-loss sip...	05/28/1996
5472312	Water level regulating system A water level regulating system controlling the water level of a head tank of each of a plurality of hydroelectric plant installed in cascade along a stream by using an opening of guide vanes of a hydraulic turbine as a manipulated variable, and the water...	12/05/1995
5252025	Drainage pump A drainage pump (10) in which the portion near the entrance of the impeller (12) in the suction tube (11) is open to the set lowest suction water level (L.W.L.) through an air intake pipe (15), so that air is introduced into the portion near the entrance ...	10/12/1993
5154741	Deep-water oil and gas production and transportation system A deep-water oil and gas production and transportation system including a wet Christmas tree, a 2-phase oil/gas vertical separator, a gas cooler, a vertical tubular scrubber and a motor-pump, and a platform which includes a velocity variator for the motor...	10/13/1992
5154570	Vertical shaft pump A vertical shaft pump to be disposed in a pump pit comprises a pump casing having a suction opening, and an impeller disposed in the pump casing below a position corresponding to the lowest water level in the pump pit below which the pump starts to suck a...	10/13/1992
5145314	Low drag pitot pump and method of operating same A method of operating a pitot pump that pressurizes a first fluid of a first viscosity and first density wherein the pump includes a rotatable housing and a stationary probe disposed within the housing includes the steps of providing a source of a second ...	09/08/1992
5087171	Paper pulp centrifugal pump with gas separation The invention relates to a centrifugal pump particularly adapted for pumping fibrous suspensions from within a reservoir, wherein the pump includes a rotor arranged wholly within the reservoir for cooperation with the bottom wall thereof to effect fluidiz...	02/11/1992
5074746	Constant speed vertical pump with aeration According to the vertical pump of the present invention, a reverse U-shape air suction passage is connected to a suction casing which communicates with the impeller chamber, and a U-shape branch passage is branched from a hanging portion of the air suctio...	12/24/1991
4936744	Centrifugal pump The invention relates to a centrifugal pump of the type adapted for use in pumping multiple phase liquids, i.e. liquids having entrained gas and liquids having both entrained gas and solids. The pump includes means for effecting an initial separation of g...	06/26/1990
4889468	Submerged type pump There is disclosed a submerged type pump which is vertically seated on the seating face arranged on the bottom of the fluid lifting column and is comprised of a motor section and a pump section with a casing in which the treating fluid may pass, wherein a...	12/26/1989
4688986	Bulb turbine emergency counterweight system A fluid container associated with the wicket gate operating ring to receive fluid from a source so as to add an emergency counterweight to the gate operating ring upon failure of the gate operating ring servomotors....	08/25/1987
4683718	Method and apparatus for monitoring hydro turbine plants A method and a device for monitoring hydro turbine plants. The device comprises one or several hydro turbines, at least one of them having adjustable vanes. For optimum utilization of the available amount of water, the vane angles in the turbine are autom...	08/04/1987
4679980	Gravity insensitive inventory control device for a two-phase flow system An inventory control device for a pitot pump used in a two-phase flow system, such as a closed-cycle Rankine system or a two-phase cooling loop for space vehicles. In these systems, there is a change of phase between liquid and vapor, dependent upon a cha...	07/14/1987
4674279	Control system for run-of-river hydroelectric plant A control system for a hydroelectric power plant of the run-of-river type wherein the load on the turbine-generator units is matched to the flow of the river so that the units operate at the maximum head available for existing flow conditions to produce t...	06/23/1987
4629393	Method of operating multistage hydraulic machinery In a water level depressing operation of a multistage hydraulic machine, first, the guide vane in the maximum-pressure stage is totally closed. Then, the respective guide vanes in the remaining stages are left opened more or less, and compressed air is su...	12/16/1986
4547123	Multi-stage hydraulic machine and method of operating same A multi-stage hydraulic machine which includes a plurality of runner housings or chambers each having a runner positioned therein, a head cover and an intermediate speed ring, movable guide vanes at an outside portion of the runner housing or chamber of t...	10/15/1985
4472105	Rotary type pumping machine A rotary type pumping machine such as a pump turbine in a pumped storage hydro-electric plant, wherein, when the pumping operation of the runner of the machine is started, compressed air is introduced into the runner chamber to depress the water surface i...	09/18/1984
4461614	Through flow sump pump An improved sump pump apparatus of submersible nature of the type in which a pump impeller is located above an intake opening for drawing sump water through the intake opening and expelling the same through a pump discharge connection. The pump impeller i...	07/24/1984
4344735	Method of controlling two-stage hydraulic pump-turbines A method of controlling a two-stage hydraulic pump-turbine, rotating at a constant speed under a steady condition, in which high and low pressure stages are connected through a return passage. The variable degrees of openings of movable guide vanes of the...	08/17/1982
4137005	Oceanic wave powered prime mover A prime mover has a number of bladed rotors supported on a drive shaft over the surface of a wave-generating body of water for rotating the shafts by action of waves against the rotors. Unique planetary gearing assemblies coupling each rotor to the shaft ...	01/30/1979
4130373	Erosion suppression for liquid-cooled gas turbines By maintaining a circumferentially-continuous, rotating film of water on the housing of a water-cooled gas turbine, kinetic energy imparted to the cooling water droplets by rotational velocity of the turbine bucket shrouds is partially absorbed in the fil...	12/19/1978
3945754	Hydraulic machines and operating method thereof A hydraulic machine, such as a reversible pump-turbine, is provided with an automatic air vent valve disposed in the casing area and a conduit having a valve for providing direct fluid communication between the casing area and the draft tube, in addition ...	03/23/1976

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Class 415/24 - Responsive to liquid level or weight