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| Number | Title | Issue Date |
| 7918655 | Fixed and variable compressor system capacity control A compressor control system includes at least one variable compressor, at least one fixed-capacity compressor, and a controller. The controller modulates the variable compressor based on a suction pressure reading of the variable compressor. In addition, the control... | 04/05/2011 |
| 7409849 | Oil filtration system for plural phase power equipment tanks Insulating oil in electric power generation, transmission and distribution equipment such as circuit breakers, regulators, phase shifters, tank diverter switches and capacitor banks for respectively separated phases of a plural phase transmission or distribution lin... | 08/12/2008 |
| 7387498 | System and method for noise attenuation of screw compressors A system is provided for attenuating noise in at least two positive displacement compressors proximately located from each other for use with at least one heating or cooling system. A lead compressor and a lag compressor have a selectably controllable rotational spe... | 06/17/2008 |
| 7384183 | Mobile decontamination unit An apparatus capable of mixing and dispensing a decontaminant foam that is useful in strategic and tactical decontamination comprises in one embodiment a plurality of tanks 11, a pump assembly that is capable of mixing binary or multi-component decontaminant ... | 06/10/2008 |
| 7201016 | Refrigerant supply apparatus A refrigerant supply apparatus for supplying a refrigerant to a cooling target. The apparatus includes a refrigerant supply channel through which pure water as the refrigerant is supplied to the cooling target, an impurity removing unit disposed in an impurity remov... | 04/10/2007 |
| 7189320 | Pump, pump for liquid chromatography, and liquid chromatography apparatus The invention provides a pump for liquid chromatography excellent in feeding liquid stably at an extremely low flow rate and in discharging bubbles at startup. In a pump for liquid chromatography including a cylinder and a plunger that reciprocates in the cyl... | 03/13/2007 |
| 7186099 | Inclined scroll machine having a special oil sump A scroll-type compressor is provided in an inclined or inverted position with an oil sump disposed adjacent to a gas inlet of the scroll wraps to allow droplets of oil to be entrained in the gas being compressed so that the oil droplets in the gas can cool the scrol... | 03/06/2007 |
| 7179046 | Fan array fan section in air-handling systems A fan array fan section in an air-handling system includes a plurality of fan units arranged in a fan array and positioned within an air-handling compartment. One preferred embodiment may include an array controller programmed to operate the plurality of fan units a... | 02/20/2007 |
| 7162948 | Variable stroke assembly balancing An assembly includes a piston and a transition arm coupled to the piston. The position of the transition arm is adjustable to vary a stroke of the piston. A balance member is adjustable relative to the transition arm to counterbalance the transition arm in varying p... | 01/16/2007 |
| 7152618 | Vacuum station and the method for operating the same A vacuum station is used for storing sewage from a vacuum sewage pipe and then delivering the sewage to a sewage treatment plant or the like. The vacuum station includes a collection tank for collecting sewage, a plurality of vacuum pumps for depressurizing and pres... | 12/26/2006 |
| 7137775 | Fan array fan section in air-handling systems A fan array fan section in an air-handling system includes a plurality of fan units arranged in a fan array and positioned within an air-handling compartment. One preferred embodiment may include an array controller programmed to operate the plurality of fan units a... | 11/21/2006 |
| 7090475 | Hydraulic control circuit for a hydraulic engine with at least two speeds A hydraulic control circuit for a radial piston engine with two speeds. The changeover between the speeds takes place through the alteration of the absorption volume, the delivery side being connected to the discharge side with a bypass connection by a valve arrange... | 08/15/2006 |
| 7090473 | Multiple stage pump with multiple external control valves A multiple stage pump having valves downstream from each respective pump in a same line thereof. The respective lines then merge into a common line. The multiple stage pump prevents pressure variations and shot to shot fuel variations. ... | 08/15/2006 |
| 7063785 | Pump for liquid chromatography The invention provides a pump for liquid chromatography excellent in feeding liquid stably at an extremely low flow rate with high accuracy and in discharging bubbles at startup. At startup, a first plunger feeds solvent at a large flow rate to discharge bubb... | 06/20/2006 |
| 7063513 | Liquid chromatograph pump with dual cylinders and dual plungers In a pump for feeding a liquid for chromatography, first and second plungers form first and second volumes respectively together with first and second chambers, the first plunger is prevented from changing the first volume sufficiently for feeding the liquid between... | 06/20/2006 |
| 6978746 | Method and apparatus to control a variable valve control device The present invention provides an improvement over conventional engine control systems for variable valve control devices for the valvetrain in that it provides a substantially closed-circuit hydrostatic fluid control system and accompanying method to improve respon... | 12/27/2005 |
| 6933687 | Dual motor configuration with primary brushless motor and secondary integrated speed control motor A dual motor configuration 10 is provided for driving two fans for moving air to cool an engine. The dual motor configuration includes a primary brushless motor 18 constructed and arranged to be electronically controlled to drive a first fan 16 ... | 08/23/2005 |
| 6932583 | Multiple stage pump with multiple external control valves A multiple stage pump having valves downstream from each respective pump in a same line thereof. The respective lines then merge into a common line. The multiple stage pump prevents pressure variations. The multiple stage pump includes a first pump in a first stage ... | 08/23/2005 |
| 6913447 | Metering pump with varying piston cylinders, and with independently adjustable piston strokes A metering pump includes an actuating mechanism, and a plurality of piston cylinders coupled to the actuating mechanism. A first of the cylinders has a working volume that differs from a second of the cylinders. The actuating member is centrally located and the cyli... | 07/05/2005 |
| 6890157 | Matching or not matching flow rates in two fluidly-unconnected flow paths A flow rate of unconnected first and second fluid flows is matched or not matched, such as, but not limited to, matching or not matching the flow rate of the replacement water stream with the waste water stream in kidney dialysis. First and second flow paths are int... | 05/10/2005 |
| 6874326 | Air conditioning system with two compressors and method for operating the same Disclosed are an air conditioning system with two compressors and a method for operating the same, so as to variably change a compression capacity of a refrigerant according to the variation of cooling load. Herein, when a full operation order is inputted to the two... | 04/05/2005 |
| 6869274 | Method of reducing pressure peaks in a fuel injector A multiple stage pump having valves upstream from each respective pump in a same line thereof. The respective lines then merge into a common line. The multiple stage pump prevents pressure variations. The multiple stage pump includes a first pump in a first stage an... | 03/22/2005 |
| 6824364 | Master/slave pump assembly employing diaphragm pump A master/slave pump assembly employs a dual diaphragm pump as the master pump. An abrasive fluid, such as a resin containing abrasive particles, can be pumped by the dual diaphragm pump without the damage that would result from exposure of seals to the abrasive flui... | 11/30/2004 |
| 6814546 | Multifan-equipped apparatus for cooling objects mounted at local interior regions and provided with fan-unit assembly and operation monitoring means having an error detector A multifan-equipped apparatus in which a plurality of objects mounted are controllably cooled by blowing air using a fan-unit assembly composed of a plurality of fan units. The plural fan units are divided into a plurality of groups; the fan units in the same group ... | 11/09/2004 |
| 6811382 | Integrated pumping system for use in pumping a variety of fluids An integrated pumping system for use in environments, such as subterranean environments, to move a desired fluid from one location to another. The integrated pumping system comprises one or more stages that each have an integrated pump and motor. A controller may be... | 11/02/2004 |
| 6804971 | Apparatus and method for controlling compressors of air conditioner Disclosed are an apparatus and a method for controlling a plurality of compressors of an air conditioner. The apparatus comprises a counter, a timer, and a controller. The counter serves to count the number of times of operations/stoppages of the plural compressors ... | 10/19/2004 |
| 6783331 | System and method of multiple-phase pumping A pump system for multi-phase fluids that includes a drive-shaft (11), mechanical differential units (12, 22, 23, 23′, D1 . . . Dn) and pumps (14, 14′, 25, 25′, 25″, 25′″, B1 . . . Bn) wher... | 08/31/2004 |
| 6672846 | Capacity modulation for plural compressors A compressor system includes a pair of compressors located in a common shell. A common drive shaft drives both compressors and the drive shaft is powered by a single motor. One or both of the compressors can be equipped with a pulse width modulated capaci... | 01/06/2004 |
| 6659726 | Variable speed control of multiple motors A system for variable speed control of a plurality of motors under variable load demand is provided. The system includes a constant power source and a plurality of motors having electrical circuits with switches to connect with the constant power source. ... | 12/09/2003 |
| 6644930 | Method and arrangement for pumping a material using a dual chamber pump system A pumping method and arrangement, in which at least two chamber pumps (A, B) are operated in order to achieve a constant output flow. In the pumping procedure and arrangement, the entry chamber (110, 130) of the chamber pump is pre-pressurised close to th... | 11/11/2003 |
| 6579067 | Variable speed control of multiple compressors A system for variable speed control of a plurality of compressors under variable load demand. The system includes a constant power source and a plurality of compressor motors having switches to connect with the constant power source. The system further in... | 06/17/2003 |
| 6537019 | Fan assembly and method A fan assembly includes a first fan and a second fan. The first fan has a first housing and a first blade assembly. The first blade assembly includes a plurality of blades attached to a hub, and is configured to rotate about a first axis of rotation in a ... | 03/25/2003 |
| 6508308 | Progressive production methods and system Methods for staged production from a wellbore include pumps sequentially operated during the life of the well. In described embodiments, production assemblies are used for progressive staged production process in which the production tubing is bifurcated ... | 01/21/2003 |
| 6478550 | Multi-stage capacity-controlled scroll compressor A first bypass valve (27) that sets discharge capacity to 60% is provided in a first scroll 21 of an asymmetrical spiral-type scroll compressor. Also, a second bypass valve (40) that makes suction side and discharge side communicated with each other so th... | 11/12/2002 |
| 6453881 | Method of and system for controlling fuel supply aggregates in motor vehicles and a vehicle provided therewith In a fuel supply system for an internal combustion engine of a motor vehicle with at least two fuel feeding aggregates arranged in a fuel tank, a control unit controls the fuel feeding aggregates, so that in dependence on determined data for longitudinal ... | 09/24/2002 |
| 6419841 | Fluid dispensing system A fluid dispensing system is provided which has a first diaphragm pump, a filter connected to receive the discharge of said first pump, and an accumulator/second diaphragm pump connected to receive the discharge of said filter. Hydraulic fluids pumped by ... | 07/16/2002 |
| 6419455 | System for regulating pressure in a vacuum chamber, vacuum pumping unit equipped with same The invention relates to a system for regulating the pressure in an enclosure (1) that is to contain processed gas for manufacturing semiconductor components or micro- or nano-technology devices, the enclosure being connected by pipework (2) to a pump uni... | 07/16/2002 |
| 6269872 | System and method for regulating coolant flow rate to a heat exchanger A method for regulating coolant flow rate to a heat exchanger in an automotive vehicle is described. The method includes the steps of providing a main fluid pump for providing a source of fluid under pressure to the vehicle engine and the heat exchanger a... | 08/07/2001 |
| 6244838 | Fluid pumping process and system using a pump with a constant intake or delivery rate The invention is a system and process for pumping fluids in lines, comprising using, on the lines, a pump with at least two alternating fluid pumping units. Each pumping unit (PU1, PU2) comprises a cylinder (2) and a piston (1) alternately displaceable in... | 06/12/2001 |
| 6241432 | Machine tool accessory high pressure fluid distribution system A machine tool accessory fluid distribution apparatus comprising a booster pump, a fluid distribution system, and a controller. The booster pump is adapted for discharging, from a discharge end of the pump, fluid at a different pressure than a fluid press... | 06/05/2001 |
