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| Number | Title | Issue Date |
| RE41861 | Decoupled check-relief valve A decouple check-relief valve for use in a hydraulic fluid circuit is provided that has a cylinder guide housing which travels during the check function of the valve. The cylindrical guide housing has a clearance parameter, allowing for the selection of an optimal c... | 10/26/2010 |
| 7270145 | unloading/venting valve having integrated therewith a high-pressure protection valve The invention relates to valves for air compressors, and more particularly, to an unloading/venting valve having integrated therewith a high-pressure protection valve where a pressure reducing valve has a discharge port in communication with the air system and a ven... | 09/18/2007 |
| 7077160 | Water pressure pump An apparatus for boosting residential water pressure. To attain this, a conduit receives water supplied to a residence and routes the water through and inlet on/off valve and a first check valve to a pump, where said pump provides water to the residence as well as t... | 07/18/2006 |
| 7059345 | Pump bypass system A system for injecting water into a well boosts pressure in a flowline leading to the injection well. A bypass flowline is connected into and forms part of the main flowline. A bypass valve is located in the bypass flowline for opening and closing the bypass flowlin... | 06/13/2006 |
| 7044157 | By-pass valve unit for a high pressure liquid delivery unit The unit of the invention comprises a motor-driven high pressure pump (11) having a delivery side (13) and a suction side (14), and a delivery gun (15) connected to the pump delivery side (13) by a delivery conduit (16) havi... | 05/16/2006 |
| 6945755 | Fluid controlled pumping system and method A fluid level controlled pumping system includes a pumping unit disposed within a fluid cavity. The pumping unit includes an inlet operable to receive a fluid to be pumped from the fluid cavity. The system also includes a valve slidably coupled to the pumping unit. ... | 09/20/2005 |
| 6920897 | Potable water circulation system The present invention relates to systems for circulating water in a potable water piping network to prevent the stagnation of water in this piping network. Several systems are disclosed wherein partitioned pipes, pumps, partitioned headers, check valves, and scoop i... | 07/26/2005 |
| 6910502 | Decoupled check-relief valve A decoupled check-relief valve for use in a hydraulic fluid circuit is provided that has a cylindrical guide housing which travels during the check function of the valve. The cylindrical guide housing has a clearance parameter, allowing for the selection of an optim... | 06/28/2005 |
| 6871661 | Combination fitting A combination fitting for flow control devices in an automotive power steering system having channels disposed in the fluid receiving end of the fitting. ... | 03/29/2005 |
| 6799602 | Combination fitting A combination fitting for flow control devices in an automotive power steering system having channels disposed in the fluid receiving in of the fitting. ... | 10/05/2004 |
| 6705344 | Potable water circulation system The present invention relates to systems for circulating water in a potable water piping network to prevent the stagnation of water in this piping network. Several systems are disclosed wherein partitioned pipes, pumps, partitioned headers, check valves, and scoop i... | 03/16/2004 |
| 6543476 | Relief valve for an oil pump A relief valve for regulating discharged oil pressure of an oil pump at a predetermined level comprises a cylinder including a bore therein and relief grooves formed symmetrically relatively to an axial center of the bore, while each of the relief grooves... | 04/08/2003 |
| 6497556 | Fluid level control for a downhole well pumping system A fluid level controlled pumping system includes a pumping unit disposed within a fluid cavity. The pumping unit includes an inlet operable to receive a fluid to be pumped from the fluid cavity. The system also includes a valve slidably coupled to the pum... | 12/24/2002 |
| 6276395 | Processing installation for rinsing water having an independent recycling filtering device The processing installation comprises a processing machine 12 provided with a tank 14 and a recycling device 22 linked to the tank 14 by a feeding pipe 26 enabling a first pump 24 firmly attached to the recycling device 22 to take the liquid from the tank... | 08/21/2001 |
| 6123509 | Pressure valve device for a cleaning apparatus A pressure valve used in a cleaning apparatus. The pressure valve is provided between a pump motor and a cleaning injector. The pressure valve includes a valve body, a floating valve rod, a ball valve, a compression spring, and an adjusting screw. The val... | 09/26/2000 |
| 6029688 | Water wheel for pumping chemical treatment into water stream The invention is a water wheel supplying energy to a pump. The pump will typically be used to apply chemical treatments to the water stream. Some examples of chemicals to be added are acids or bases to bring the pH to an acceptable level, precipitation ai... | 02/29/2000 |
| 5921274 | Internal relief and bypass valve for pumps and piping systems A pressure relief or fluid bypass valve is provided which includes a valve body comprising a first piston, a second piston and a seating land disposed between the first and second pistons. The first piston is directed toward the discharge side of the flui... | 07/13/1999 |
| 5603344 | Apparatus for recovering and saving chilled water in hot water lines having adjustable thermostatic control A water saving device for use with domestic hot water systems of the noncirculating storage tank heater type uses a hydraulic motor to drive a water pump to pump water from the hot water pipe to a cold water pipe. Pumping begins when a hot water tap conne... | 02/18/1997 |
| 5564317 | One-piece pressure relief valve for transmission cooling system A one-piece relief valve is incorporated into a transmission cooling system. The one-piece relief valve replaces the prior art systems which have used plural T-connections to achieve the relief valve function. The one-piece relief valve reduces the number... | 10/15/1996 |
| 5421362 | System of plumbing for an over-the-road vehicle The invention provides an improved system of plumbing for over-the-road, domestic vehicles. The system includes a compact, unitary water distribution manifold for distributing water from an external supply of water. The manifold defines a system of condui... | 06/06/1995 |
| 5375619 | Protective circuit for pressure and return A protective circuit (40) for pressure and return connections of a hydraulic system. The protective circuit includes a four-way, two-position on/off valve (65) having a first (66), second (68), and third (70) port. In its "off" position, valve (65) connec... | 12/27/1994 |
| 5318070 | Electric faucet valve operator adapter A portable electric adapter unit is installed by removing the operating knobs or levers of an existing household faucet and locking the unit to the exposed valve stems. Switches on the unit control motors which drive a gear chain which, In turn, rotate th... | 06/07/1994 |
| 5285759 | Fuel system A fuel system of an internal combustion engine comprises a fuel tank for storing fuel, a fuel injection valve disposed on the internal combustion engine, a fuel supply pipeline connecting between the fuel tank and the fuel injection valve, a fuel pump for... | 02/15/1994 |
| 5156177 | Flow loading unloader valve A flow loading unloader valve wherein the operating force for moving the valve from the unloaded condition to the loaded condition is supplied by the flow through the valve itself. The valve, which may be interposed between a fluid supply and a high press... | 10/20/1992 |
| 5154202 | Low forward pressure burst-high backpressure resistant rupture disc A fluid pressure relief assembly for a system operating under an elevated pressure includes a support structure having means defining a bore therethrough of desired cross-sectional configuration, the support structure being provided with a shoulder extend... | 10/13/1992 |
| 5148792 | Pressure-responsive fuel delivery system A fuel delivery system for an internal combustion engine that includes a fuel supply with a pump responsive to application of electrical power for supplying fuel under pressure. A fuel injector is coupled to the supply for controlled delivery of fuel from... | 09/22/1992 |
| 5145328 | Fuel supply unit for an oil burner A gear pump receives fuel oil from an intake line leading from a storage tank and supplies pressurized fuel to a regulating valve which selectively opens and closes to control the flow of fuel to an oil burner. When the pump first starts but before the re... | 09/08/1992 |
| 5099871 | Low friction proportional unloading valve A low friction proportional unloading valve mechanism for pressurized fluid circuits incorporating a valve housing forming primary and bypass fluid circuits. A normally closed unloading valve normally prevents the flow of incoming fluid to the bypass flui... | 03/31/1992 |
| 5097857 | Electro-hydraulic valve-actuator system An electro-hydraulic valve-actuator system (30) includes an electric motor (58) for driving a hydraulic pump (60), with an electrical control circuit (68) energizing the electric motor to thereby furnish hydraulic fluid to a valve actuator (16). A timer (... | 03/24/1992 |
| 4981154 | Fluid flow control device A fluid flow control device operable in a gas purge mode, liquid flow mode or backflow restriction mode for use with a fluid circulating system to selectively control the direction of fluid flow through the fluid circulating system, the fluid flow control... | 01/01/1991 |
| 4953582 | Combined pressure regulator and relief valve having a single biasing means A pressure regulator and relief valve including a valve body, a first regulating valve moveable between first and second positions in response to a predetermined gallery pressure for regulating the pressure of a fluid, a second relief valve moveable betwe... | 09/04/1990 |
| 4941502 | Low pressure recirculation valve A low pressure recirculation valve for cooling a centrifugal pump. The invention comprises a unitary valve casing divided into a first valve chamber and a second valve chamber, the casing having a first port for introducing fluids into said first chamber,... | 07/17/1990 |
| 4917570 | Turbine shaft axial load protection system An axial thrust limiting system for a steam turbine including a rotor having a shaft, the turbine containing a plurality of chambers each defining a pressure zone containing a fluid which, during operation of the turbine, is at a pressure which influences... | 04/17/1990 |
| 4838311 | Control system for a programmed spraying device In the sequential coating of motor-vehicle bodies using a preprogrammed painter-robot, the paint is switched on and off by an automatically controlled pilot needle-valve (FNV) at predetermined times as a function of the relative positions of the robot and... | 06/13/1989 |
| 4833880 | Fluidic set point amplifier apparatus and method, and uses thereof A fluidic set point amplifier provides an output signal which is strongly linear with respect to pressure of fluid supply, free of hysteresis, and has a zero crossing (set point) at a determined value of supply pressure. Uses of the set point amplifier in... | 05/30/1989 |
| 4735225 | Method and apparatus for drawing and regulating the output and pressure of a liquid additive The invention provides a method and an apparatus for drawing a liquid from a reservoir and regulating the output and pressure of the liquid in order to inject it in precise proportions into another liquid flowing in a distribution system with a predetermi... | 04/05/1988 |
| 4569483 | Apparatus for cleaning objects by spraying The apparatus uses a low pressure water stream, from a tap source, into which chemicals can be selectively introduced, and a high pressure water stream produced by a pump, into which chemicals can be selectively introduced, and an air stream into which ch... | 02/11/1986 |
| 4503885 | Engine fuel supply system In association with a vehicle engine, a fuel system including a fuel tank with an inlet pickup for discharging fuel from the tank, pump means to transport fuel from the tank pickup to the engine in a quantity normally in excess of the quantity needed for ... | 03/12/1985 |
| 4487224 | Air switch and filter combination An air switch comprises a switch body having a recess thereon and a switching member having an output connection port. The recess is connected to vacuum and pressure outlets through passages in the switch body. The vacuum passage is connected to a port on... | 12/11/1984 |
| 4139019 | Method and system for transporting natural gas to a pipeline Natural gas from one or more wells is gathered, dehydrated, compressed to a relatively high pressure, and loaded into pressure vessel means mounted for transporting at ambient temperatures by a transport vehicle. The pressure vessel means is then driven t... | 02/13/1979 |
