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| Number | Title | Issue Date |
| 7491035 | Cyclic condensate pump having a three-way valve A condensate pump includes a condensate reservoir, a liquid level float sensor operable to sense a liquid level within the condensate reservoir, and a pressure/vent valve including a pressure source, a pressure vent, and a primary piston slidably supported in a prim... | 02/17/2009 |
| 7360545 | Dishwasher A dishwasher having an improved valve assembly is disclosed. The dishwasher includes a housing, a tub provided in the housing, an injector assembly for injecting water onto tableware positioned in the tub, and an inlet valve assembly. The inlet valve assembly includ... | 04/22/2008 |
| 7198469 | Wind generator of the type with automatic power regulation The invention relates to a wind generator of the type with automatic power regulation, comprising at least one propeller having at least two blades (21), whereby the efficiency of one propeller varies inversely to a variation in the wind energy, from a lower ... | 04/03/2007 |
| 7070394 | Gas pressure driven fluid pump having pilot valve controlling disc-type motive and exhaust valves A gas pressure driven fluid pump comprising a pump tank having a liquid inlet and a liquid outlet. A float, carried within the interior of the pump tank, is operable to move between a low level position and a high level position. A snap-acting valve is operatively c... | 07/04/2006 |
| 7007456 | Dual chamber pump and method Disclosed is a pneumatically powered high-pressure and lightweight fluid pump. The pump is useful for pumping fuel for liquid rocket engines and for pumping water, such as for fire suppression. During operation of the pump, liquid is drained from a tank into a pump ... | 03/07/2006 |
| 6808370 | Gas pressure driven tank fluid pump having float and snap-acting rotary valve A gas pressure driven fluid pump comprising a pump tank having a liquid inlet and a liquid outlet. A float, carried within the interior of the pump tank, is operable to move between a low level position and a high level position. A snap-acting valve is operatively c... | 10/26/2004 |
| 6599096 | Steam driven pump A pump includes a valve mechanism having an opened position and a closed position. The pump further includes a spring assisted mechanism for selectively moving the valve mechanism between the opened position and the closed position, and a fluid detector f... | 07/29/2003 |
| 6572340 | Pressure motive pump assembly comprising a float, an over center linkage mechanism, and a pair of positive stop or abutment means for ensuring over center tripping action A motive pump assembly comprising a hollow housing having an inlet valve and outlet valve for a fluid to be pumped, an inlet valve for a motive fluid operatively between open and closed positions, a vent valve and means for simultaneously opening and clos... | 06/03/2003 |
| 6450784 | Air-operated pumps with removable cartridges and improved manifold attachment mechanisms An air-operated pump for groundwater sampling and other applications includes a removable cartridge coupled to a manifold configured to receive air-inlet and fluid-discharge tubes from an above-ground location. The removable cartridge may be in the form o... | 09/17/2002 |
| 6234762 | Reversible venturi-effect pump A pump for both filling and emptying containers with liquids, flowable solids, etc. has a body which is screwed into a bung hole in the top wall of the container. According to the state of evacuation or pressurization produced in the container by the pump... | 05/22/2001 |
| 6224343 | Automated, air-operated bellows pumps for groundwater sampling and other applications An air-operated pump for groundwater sampling features a corrugated bellows as opposed to the traditional bladder used for fluid collection. The preferred embodiment includes an air-supply line and a fluid-discharge line, each coupled to the pump body thr... | 05/01/2001 |
| 6186745 | Gas pressurized liquid pump with intermediate chamber The multi-chamber liquid pump of the present invention includes an input chamber, an intermediate chamber and a liquid output chamber. Pressurized gas provides the motive force for outputting liquid from the pump, such that liquid is output at a constant ... | 02/13/2001 |
| 6146104 | Groundwater recovery system incorporating a combination of pressure and vacuum to accomplish removal of groundwater fluids from a downhole pump A well and method for using the well for removing lighter than water pollutants (e.g. hydrocarbons and other organics) from a water table. The well includes a pneumatic pump having an air exhaust port to which a vacuum hose is attached for applying a vacu... | 11/14/2000 |
| 6095759 | Submersible pump having float actuated valve A submersible pump is disclosed for use in a body of liquid such as a well or sump. The pump has an air intake port and an air outlet port, as well as a liquid intake port and a liquid discharge tube. A valve mounted within the pump selectively permits th... | 08/01/2000 |
| 6045336 | Pump and valve for leachate extraction of heavier than water fluids In combination with a pump, a valve for operation at the interface between underlying heavier liquid and overlying lighter liquid is disclosed. The valve includes an inlet within the heavier liquid communicated from a valve seat to a conduit which typical... | 04/04/2000 |
| 6039546 | Float operated pneumatic pump to separate hydrocarbon from water A float operated pneumatic pump which separates water from hydrocarbons within a well at the pump in accordance with the density or specific gravity of the water and hydrocarbon fluid. The pump includes a displaceable fluid inlet for allowing fluid to ent... | 03/21/2000 |
| 6027314 | Pneumatically powered submersible fluids pump with casing activator A pump, submerged in a fluid in a pump or well, has a buoyant outer, enclosing casing. Communicated to the casing are a conduit to supplying compressed air to the casing, a conduit for carrying the exhausted air away from the casing, an inlet and check va... | 02/22/2000 |
| 5971715 | Pneumatic pump having radial ball check valve array In a pneumatic pump of the float actuated variety, a radial check valve array is utilized for minimizing the trigger point of the pump relative to the bottom of the leachate and/or groundwater table. The pump includes a fluid-tight casing from which fluid... | 10/26/1999 |
| 5944490 | Pneumatically operated submersible pump with float control A submersible pump is disclosed for use in a body of liquid such as a well or sump. The pump has an air intake port and an air outlet port, as well as a liquid intake port and a liquid discharge tube. A valve mounted within the pump selectively permits th... | 08/31/1999 |
| 5941691 | Overcenter mechanism for a pressure powered pump A pressure powered pump has valve members 18, 20 operated by a float acting through an overcenter mechanism 24. The overcenter mechanism has a valve actuating lever 36, on which are provided actuating pins 46, 48 for engagement with the respective valve m... | 08/24/1999 |
| 5938408 | Magnetically controlled liquid transfer system A compressed air-actuated pump includes a venturi nozzle (24) to create a vacuum condition within a fluid-tight pump body or chamber (8) to pump in a liquid or slurry from a remote location. When a given level of liquid is pumped in, a float mechanism (69... | 08/17/1999 |
| 5938409 | Gas powered fluid pump with exhaust assist valve A gas powered pump tank is alternately filled with liquid such as water at low pressure, and then emptied by gas pressure such as from pressurized steam. An auxiliary exhaust assist valve opens at a threshold pressure after switching from the pumping phas... | 08/17/1999 |
| 5662460 | Downhole pneumatic pump with variable bouyant actuator A pneumatic pump having a variable buoyant actuator to substantially reduce the volume of a float, thereby increasing the fluid capacity for any pump of a given size. The pump includes an elongated housing, a sealable fluid entry aperture and a pipe commu... | 09/02/1997 |
| 5641272 | Enhanced lever mechanism for controllerless pneumatic pump In float actuated pump having a rod and lever actuation from the float, an improved connect between the rod and lever is disclosed enabling valve opening substantially free of constraint by the rod and attached fittings. Such arrangement also enabling exh... | 06/24/1997 |
| 5641271 | Float operated pump including diaphragm valve assembly with bleed passage Pump (1) includes a pneumatic valve assembly (98) having a chamber (105) which is supplied by compressed air via an inlet pipe. Included within chamber (105) is a valve (109) with a chamber (111) divided into two separate compartments (112,113) by a plian... | 06/24/1997 |
| 5611672 | Pumping chamber movement activated downhole pneumatic pump A floatless pneumatic pump having an elongated housing including a sealable fluid entry aperture and a pipe communicating between an interior and an exterior of the housing, with the housing movably attached to the pipe for axial displacement therewith. T... | 03/18/1997 |
| 5495890 | Float operated pneumatic pump A float operated, top fill, recovery unit floats in a body of contaminated groundwater to recover a layer of liquid hydrocarbons residing on top of the groundwater. The recovery unit has an upper end fitted with a discharge check valve assembly and a lowe... | 03/05/1996 |
| 5487647 | Pneumatically powered submersible fluids pump with casing activator and biasing means A pump, submerged in a fluid in a pump or well, has a buoyant outer, enclosing casing. Communicated to the casing are a conduit to supplying compressed air to the casing, a conduit for carrying the exhausted air away from the casing, an inlet and check va... | 01/30/1996 |
| 5470206 | Pneumatically powered submersible fluids pump with casing activator A pump, submerged in a fluid in a pump or well, has a buoyant outer, enclosing casing. Communicated to the casing are a conduit to supplying compressed air to the casing, a conduit for carrying the exhausted air away from the casing, an inlet and check va... | 11/28/1995 |
| 5451144 | Air-operated pump An air-operated pump includes a pair of poppet valves affixed to a vertical valve shaft and arranged so that the upper valve is closed when the lower valve is open, and vice versa. When a connected displacer is immersed in tank fluid, its buoyancy in comb... | 09/19/1995 |
| 5358037 | Float operated pneumatic pump A float operated pneumatic pump has an outer pump body forming an outer chamber and a dip tube forming an inner chamber therein. The inner chamber of the dip tube is in communication with the outer chamber of the pump body through a back flow discharge ch... | 10/25/1994 |
| 5358038 | Float operated pneumatic pump A float operated, top fill, recovery unit floats in a body of contaminated groundwater to recover a layer of liquid hydrocarbons residing on top of the groundwater. The recovery unit has an upper end fitted with a discharge check valve assembly and a lowe... | 10/25/1994 |
| 5092743 | Pneumatically controlled pump A pump of extremely simple manufacture, requiring no maintenance, is made up of a tubular body (1) closed at each end by end pieces (10a and 10b), orifices (15a and 15b) of which are respectively connected to a pneumatic control circuit (4) and to the cir... | 03/03/1992 |
| 5004405 | Pneumatically powered submersible fluids pump with integrated controls Apparatus for the pumping of fluids from a source without the need of external controls. The pump will continue to fill and empty itself as long as there is fluid filling the pump and compressed air of sufficient pressure to overcome the head against whic... | 04/02/1991 |
| 4671742 | Water supply system, energy conversion system and their combination Water supply system comprising a unit for converting the wind energy into kinetic energy, a unit for converting the kinetic energy into another usable form of energy and a unit for supplying water driven by that usable form of energy. According to the imp... | 06/09/1987 |
| 4467831 | Fluid-logic thyristor A hybrid gate-controlled three-way valving device that because of its regenerative-feedback-induced bistable action is a fluid-logic analogue of the electronic thyristor. The device is more particularly analogous to a common electronic thyristor known as ... | 08/28/1984 |
| 4439110 | Controlling and regulating device for pumps with constant volume A device for controlling the performance of pumps, having a constant volume such as pneumatic pumps having a constant volume, comprises liquid level detectors, such as magnetic microswitches that cooperate with a magnetized float, and the detectors are ad... | 03/27/1984 |
| 4415314 | Metering pump A fluid pump for location within a reservoir and which is operable with rise and fall of liquid within the reservoir. The pump comprises a tube of a resiliently deformable material, an abutment surface which is engaged by the tube and a float device which... | 11/15/1983 |
| 4395200 | Downhole oil well pump An automatic gas operated downhole fluid pump having an elongated cylindrical chamber for receiving fluid and having a concentrically mounted cylindrical float which is connected to a valve having an actuator biased and retained in either an opened or clo... | 07/26/1983 |
| 4265599 | Hydropneumatic energy system A system for converting a constant pressure head of water into compressed air which may be utilized to transfer the potential energy of the pressure head to remote work sites.... | 05/05/1981 |
