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Class 417/41 - Controlling motive fluid or drive motor


Subclass of Class 417 - Pumps
Definition: Subject matter in which the pump is driven by a fluid motor
No. of patents: 42
Last issue date: 06/03/2008


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NumberTitleIssue Date
7380566Dewatering system and method for a subsurface vault
A system and method for dewatering a subsurface vault housing a portion of a pipeline is provided. The dewatering system includes a fluid inlet pipe adapted for fluidly communicating with the pipeline and redirecting fluid being transported by the pipeline to a flui...
06/03/2008
7281903Device for varying the pressure of the fluid delivered by a jet washer
Device for varying the delivery pressure of a jet washer comprising a positive-displacement pump operated by a single-phase electric motor powered by alternating current and having a delivery nozzle of predetermined cross-section, and electronic means for controllin...
10/16/2007
7204143Liquid level controller
An apparatus and methods of using the apparatus are disclosed. Preferably, the apparatus includes at least a fluid level detection portion communicating with a fulcrum that provides at least a first lobe and a second lobe, and a control portion responsive to the fir...
04/17/2007
7134486Control of electrolysis gases in electroosmotic pump systems
Apparatus and methods according to the present invention preferably utilize electroosmotic pumps that are capable of generating high pressure and flow without moving mechanical parts and the associated generation of unacceptable electrical and acoustic noise, as wel...
11/14/2006
7123679Counter having improved counting speed
A counter having enhanced counting speed is provided. The counter includes first through N-th output signal generators. The first output signal generator responds to a clock signal and outputs a first output signal in which a low level and a high level are output on...
10/17/2006
6722855Oil pumping device
A manual/pneumatic oil pumping device having a housing defining therein an oil reserving space and an upper cover. A floating board is disposed in the oil reserving space. The upper cover is equipped with a manual air sucking mechanism, a pneumatic air sucking mecha...
04/20/2004
6375430Sump pump alarm
A sump pump has a float operated alarm switch mounted on the top end of the pump housing for activating an alarm when water rises above a normal operating level. The alarm is in a remote enclosure with the pump power plug so that plugging in the unit auto...
04/23/2002
6341944Motor start and float switch assembly
An electrical circuit connects an electric motor of a sump pump to a power source and controls the energization of a sump pump assembly. The assembly includes a motor circuit having a sump pump motor actuation switch and a main winding switch combined int...
01/29/2002
6254350Automatic sub-floor pumping system
Hydrostatic pressure, which builds up from gravity and forces water into a basement through the floor or lower walls, is relieved by sensing the water under the floor and pumping out the water to a drain or area away from the house. Thus, the water is pre...
07/03/2001
5813838Optimum electrolyte level sensing method and the automatic topping up apparatus for storage wet cell
The optimum electrolyte level sensing method and the automatic topping up apparatus for storage wet cell are disclosed. The difference in the conductivities between the distilled water and the electrolyte is utilized. An injection outlet portion(15), an a...
09/29/1998
5775877Submersible motor-driven pump with float switch
An electric submersible motor-driven pump includes a pump housing (2) in which is located a pump motor (3) and an associated impeller (4). A separate detachable float and switch housing (6) is detachably connected to the pump housing (2) and defines a sub...
07/07/1998
5718269Safety tank apparatus for liquid storage
A safety tank apparatus is provided for installation to receive and store a liquid hydrocarbon or hydrocarbons, or the like, and from which the liquid may be withdrawn. It comprises tank structure including an inner metallic tank; an outer metallic tank p...
02/17/1998
5667362Pump system and method for operating the same
A pump system comprising a pump having a centrifugal impeller driven by an electric motor, a pair of upper and lower float switches for detecting a high water level HWL and a low water level LWL, respectively, a controller for outputting a control signal ...
09/16/1997
5501577Gas operated pump leak preventer
A technique for detecting and containing liquid leaks in a liquid pumping, gas-operated diaphragm pump, and for stopping the pump operation when such leaks occur. If there is a leak in such a pump, the exhaust air gets contaminated with the liquid. With t...
03/26/1996
5449274Sump system having timed switching of plural pumps
An electronic pump selector system uses a programmable processor to select one of a plurality of pumps to be energized in response to an appropriate feedback signal from the selected pump. A current limited feedback circuit is incorporated which provides ...
09/12/1995
5432830High speed counter for alternative up/down counting of pulse trains and method therefor
An asynchronous counter includes a plurality of flip-flops, cascade connected to one another, the plurality of flip-flops serially receiving successive pulse trains having varying numbers of pulses per pulse train. Switching circuitry, coupled to the plur...
07/11/1995
5406993Safety tank apparatus for liquid storage
A safety tank apparatus is provided for installation to receive and store a liquid hydrocarbon or hydrocarbons, or the like, and from which the liquid may be withdrawn. It comprises tank structure including an inner metallic tank; an outer metallic tank p...
04/18/1995
5309939Safety device for water-conducting household appliances
A water-conducting household appliance includes a liquid container having a static content level, a fill control device, a cycle control unit, an inflow valve to be opened by the cycle control unit and closed by at least one of the fill control device and...
05/10/1994
5284191Safety tank apparatus for liquid storage
A safety tank apparatus is provided for installation to receive and store a liquid hydrocarbon or hydrocarbons, or the like, and from which the liquid may be withdrawn. It comprises tank structure including an inner metallic tank; an outer metallic tank p...
02/08/1994
5265656Safety tank apparatus for liquid storage having fire resistant construction
A safety apparatus for installation to receive and store a liquid hydrocarbon or hydrocarbons, or the like, and from which the liquid may be withdrawn comprising a structure including first and second inner metallic tanks, and an outer metallic housing pr...
11/30/1993
5261791Method and apparatus for recovering pollutants from an aquifer
Pumping apparatus for recovering a first liquid, such as a pollutant, floating on a second liquid, such as ground water. A pump immersed in the second liquid, or ground water, operates to produce a cone of depression and discharge the second liquid into a...
11/16/1993
5210886Dual outlet bathtub drain valve for water conservation system
A system for recycling water used in a bathtub/shower is disclosed. The system alternatively directs water drained from the shower or bathtub to either a recycled water storage tank or a sewer line. The water in the recyclable water tank is subsequently p...
05/18/1993
5184939Above-ground storage system
An above-ground storage system, especially for use with hazardous materials is disclosed. The system includes a first inner tank and a second outer tank. An air-operated diaphragm pump is used to fill the tank. In order to prevent overfilling of the tank ...
02/09/1993
5169291Water heater with shut-off valve
A water heater (10) has a pressure-transfer module (20) interposed between an external pressurized-water circuit and the water inside the water-heater vessel (12) so that the water is at atmospheric pressure and can thus have a free upper surface. A shut-...
12/08/1992
5137064Safety tank apparatus for liquid storage
Safety tank apparatus for installation to receive and store a liquid hydrocarbon or hydrocarbons, or the like, and from which liquid may be withdrawn, including: tank structure including an inner metallic tank, and an outer metallic tank protectively rece...
08/11/1992
5053120Arrangement for draining water collecting in the container of a water separator of an internal-combustion engine
The invention relates to an arrangement for the automatic removal of water collecting in a fuel filter having a water separator. The evacuation takes place by means of a piston acted upon by a pressure medium, preferably a fuel pressurized by the pressure...
10/01/1991
5035581Fluid level monitoring and control system
A system for monitoring and controlling the level of a fluid in a vessel, particularly applicable to controlling the pump operation at an oil well. The system includes a fluid level sensing unit having a plurality of sensors positioned at selected levels ...
07/30/1991
5016689Safety tank apparatus for liquid storage
A safety tank apparatus is provided for installation to receive and store a liquid hydrocarbon or hydrocarbons, or the like, and from which the liquid may be withdrawn. It comprises tank structure including an inner metallic tank; an outer metallic tank p...
05/21/1991
5007450Add-on liquid overflow shut-off valve for tank
An add-on liquid overflow shut-off valve including a valve body, a float and an arm connecting the float to the body that is insertable in fully assembled form through a standard tank lid opening, and further including a flanged end on the valve body for ...
04/16/1991
5007451Sump protection system
A simple and inexpensive sump protection system comprises a retainer that is placed on a building floor over a sump and a hose that leads from the retainer. The protector is formed as a short tube with an annular flange extending from one end thereof. A s...
04/16/1991
5005615Safety tank apparatus for liquid storage
A safety tank apparatus is provided for installation to receive and store a liquid hydrocarbon or hydrocarbons, or the like, and from which the liquid may be withdrawn. It comprises tank structure including an inner metallic tank; an outer metallic tank p...
04/09/1991
4948340Above-ground storage system
An above-ground storage system, especially for use with hazardous materials is disclosed. The system includes a first inner tank and a second outer tank. An air-operated diaphragm pump is used to fill the tank. In order to prevent overfilling of the tank ...
08/14/1990
4934458Small diameter dual pump pollutant recovery system
A groundwater pollutant recovery system using the cone of depression approach, in which a sensing probe having liquid level sensors responsive to both water and pollutant levels and having attached to it the pollutant intake is deployed in a recovery well...
06/19/1990
4912587Protective circuit for an electrically driven liquid vacuum cleaner
In connection with a protective circuit for an electrically driven liquid or water vacuum cleaner it is proposed to utilize the abrupt rise of the vacuum, which is encountered when a blocking element interrupts the connection between the receptacle for th...
03/27/1990
4890983Above-ground storage system
An above-ground storage system, especially for use with hazardous materials is disclosed. The system includes a first inner tank and a second outer tank. An air-operated diaphragm pump is used to fill the tank. In order to preent overfilling of the tank a...
01/02/1990
4762201Dry sump scavenging system with independent head source
A scavenging system (10 or 110) for hydraulic circulation installations. A pump (25) delivers the hydraulic fluid (19) which is thereafter collected in a sump (18 or 18A) that is to be maintained essentially dry. A reservoir (28), independent of the sump ...
08/09/1988
4560323Apparatus for controlling the flow of a fluid
An apparatus for controlling flow of a fluid having two speed-controlled positive displacement devices for supplying a load with fluid under pressure from a supply at a different pressure with interposed variable-volume buffer containers....
12/24/1985
4552512Standby water-powered basement sump pump
A water-powered positive displacement auxiliary sump pump has a drive water inlet connected to the municipal water supply via a float actuated pilot valve. The pump is designed to be constructed chiefly of molded plastic supported by an exit manifold conn...
11/12/1985
4480469Adjustable differential fluid level float indicator
The invention contemplates a float-operated electrical switching system with two fluid-level indications and with provision for mechanical adjustment of the difference in elevation between the two indicating points. The switches are magnetically actuated ...
11/06/1984
4371316Control for a bilge pump
To commence and maintain the operation of a bilge pump until the bilge area is sufficiently evacuated of excess bilge water, an electrically conductive ball is deposited in spanning relation across, and thus closes, a pair of circuit switch contacts, and ...
02/01/1983
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