Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 8062001 | Method for controlling pump transitions in a multi-mode hybrid transmission A method of pressure control for transmissions having a hydraulic circuit selectively communicating with first and second pumps via first and second regulators includes commanding communication to the hydraulic circuit to transition from the first to the second pump... | 11/22/2011 |
| 7722331 | Control system for air-compressing apparatus An air-compressing apparatus has four compressors individually supplying compressed air to a tank having a pressure sensor. The pressure sensor is connected to control circuits of the compressors. The control circuits compute times needed for the tank pressure to re... | 05/25/2010 |
| 7600981 | Method for optimizing the operation of a plurality of compressor assemblies of a natural-gas compression station A method for optimizing the operation of several compressor units in a natural gas compression station. After a second or further compressor unit is started, the speeds of the running compressor units are set according to a fixed speed ratio in relation to character... | 10/13/2009 |
| 7320370 | Automatic downlink system A downlink system that includes at least one mud pump for pumping drilling fluid from a drilling fluid storage tank to a drilling system, a standpipe in fluid communication with the mud pump and in fluid communication with the drilling system, and a return line in f... | 01/22/2008 |
| 7252483 | Method of managing time, at which maintenance in a gas compressor multiple system should be carried out The method of managing time M, at which maintenance of a gas compressor multiple system incorporating therein a plurality of gas compressors should be carried out, involves making a comparison between a value of M and a predetermined time N for necessary maintenance... | 08/07/2007 |
| 7198102 | Automatic downlink system A downlink system that includes at least one mud pump for pumping drilling fluid from a drilling fluid storage tank to a drilling system, a standpipe in fluid communication with the mud pump and in fluid communication with the drilling system, and a return line in f... | 04/03/2007 |
| 7100632 | Sump liner A sump liner comprising a liner wall joined with a base member, the liner wall extending about the periphery of the base member, the liner wall comprising a primary reservoir portion and a secondary reservoir portion, with a weir extending from the base member and t... | 09/05/2006 |
| 7021902 | Hybrid compressor A hybrid compressor includes a first compression mechanism, which is driven by a first drive source, and a second compression mechanism, which is driven by a second drive source. A first discharge port of the first compression mechanism and a second discharge port o... | 04/04/2006 |
| 7010393 | Controlling multiple pumps operating in parallel or series Often, an application or process calls for multiple pumps operating within a piping network. Pump load, such as flow rate or pressure, is shared between these multiple pumps. The present disclosure relates to effective means of distributing the pumping load in a man... | 03/07/2006 |
| 6973798 | Air conditioning system for vehicle An air conditioning system 1 includes a primary compressor (an engine-driven compressor 6) driven by a primary driving source (an engine 2) and a secondary compressor (a motor-driven compressor 7) driven by a secondary driving source (a m... | 12/13/2005 |
| 6929447 | Steam line closing valve and steam turbine plant comprising such a steam line closing valve The invention relates to a steam line closing valve for closing a steam line, especially in a steam turbine plant between a first partial turbine and at least one second partial turbine that is operated at a lower pressure than the first partial turbine. According t... | 08/16/2005 |
| 6908289 | Fuel pump with automatic shutoff A pressure sensor subsystem measures the pressure within a fuel pump and outputs an under-pressure signal when the measured pressure is below a predetermined threshold pressure value. A temperature sensor subsystem measures the temperature within the fuel pump and o... | 06/21/2005 |
| 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 |
| 6854479 | Sump liner A sump liner comprising a liner wall joined with a base member, the liner wall extending about the periphery of the base member, the liner wall comprising a primary reservoir portion and a secondary reservoir portion, with a weir extending from the base member and t... | 02/15/2005 |
| 6840743 | Plural fan installation for a cooling system for a motor vehicle, with a control unit, for controlling plural fan motors, mounted within one motor housing The present invention provides a fan installation for a cooling system of a motor vehicle, comprising at least two fans which respectively have an electric fan motor arranged in a separate housing and a fan wheel which can be driven by the fan motor. The fan install... | 01/11/2005 |
| 6453927 | Method and apparatus for precisely dispensing liquids A method and apparatus are provided for continuously dispensing precise quantities of a liquid from a dispenser holding tank into a receiving tank. A first elastic tube permits fluid flow between the holding tank and the receiving tank and a first perista... | 09/24/2002 |
| 6419454 | Air compressor control sequencer A controller for managing a plurality of compressors in an efficient manner such that the system uses less energy, has lower maintenance cost and experiences less wear. For a system with multiple compressors the controller has the minimum number of compre... | 07/16/2002 |
| 6378554 | Controlled sewage sump network system A sewage system comprising a network of sewage sumps that temporarily store sewage produced in a dwelling or other structure, each of said sumps preferably comprising a computer controller for operating a pump in the sump such that the sewage collected in... | 04/30/2002 |
| 6368064 | Apparatus and method of providing redundant power and redundant fan speed control to a plurality of fans An apparatus and method for providing redundant power and redundant fan speed control to a plurality of fans is provided. A first power supply input is electrically connected to a second power supply input to provide a combined power supply input. First a... | 04/09/2002 |
| 6325093 | Water distributing installation controllers A water distributing installation controller includes water pumps for supplying clear water from a filtration plant to a distributing reservoir, a level gauge for measuring the water level of the distributing reservoir, a first flow meter for measuring th... | 12/04/2001 |
| 6266952 | Process for controlling compressors A process for controlling a system for generating electricity which contains at least two compressors and two microturbines. Compressed gas from a pressure vessel is supplied to the first microturbine, and thereafter the pressure within the pressure vesse... | 07/31/2001 |
| 6257833 | Redundant, dedicated variable speed drive system A redundant, modular pump system includes a plurality of substantially identical pump modules. Each module includes constant speed drive circuitry, variable speed drive circuitry and a pump. Expansion is accomplished by adding modules. Reliability is enha... | 07/10/2001 |
| 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 |
| 6047902 | Road marking machine with a pump combination driven in proportion with the traveling speed A road marking machine comprising a spray gun and a combination of two displacement pumps for supplying the marking substance to the spray gun, wherein the combination is driven in proportion with the traveling speed and wherein the pumps, each after star... | 04/11/2000 |
| 6045332 | Control system for multi-pump operation A control system, particularly adaptable to multiple-pump operations in process units, is disclosed. A measured variable, such as pressure, is sensed by a master controller. The master controller, in turn, sends a signal to the driver of the individual pu... | 04/04/2000 |
| 5979478 | Apparatus and method for treating water in a water supply system Apparatus for delivering a water treatment chemical to a water intake in a water system is disclosed. The water system has a water inlet and a pump for withdrawing water from a natural body of water, such as an underground aquifer, a river, a lake or the ... | 11/09/1999 |
| 5974345 | Dairy chemical dispensing system A dairy chemical dispensing system for supplying an amount of at least one chemical to a utilization point in a dairy wash system, comprising: (a) an operator input controller for receiving operator input comprising input of a given amount of chemical to ... | 10/26/1999 |
| 5925220 | Suction roll of a paper machine having a noise damping chamber A suction roll for a paper machine or the like including a perforated annular roll shell which is rotatable. A stationary suction box inside the roll shell with respect to which the shell rotates. The suction box is defined between two circumferentially s... | 07/20/1999 |
| 5845509 | Variable speed parallel centrifugal compressors for HVAC and refrigeration systems A plurality of variable speed centrifugal compressors operated in parallel form an HVAC or refrigeration system. The compressors are operated at proportionally synchronized speeds throughout their range of operation.... | 12/08/1998 |
| 5743714 | Method and apparatus for minimum work control optimization of multicompressor stations A method and apparatus are disclosed for controlling a multicompressor station so that the overall work requirement of the station is minimized while maintaining the compressors in a non-surge conditions. The apparatus includes interconnected control loop... | 04/28/1998 |
| 5743715 | Method and apparatus for load balancing among multiple compressors Balancing the load between compressors is not trivial. An approach is disclosed to balance loads for compression systems which have the characteristic that the surge parameters, S, change in the same direction with rotational speed during the balancing pr... | 04/28/1998 |
| 5636971 | Regulation of fluid conditioning stations An arrangement for regulating fluid conditioning stations including a plurality of pumping devices, at least one fluid storage reservoir, at least one pressure transducer and regulating mechanism, the conditioning station providing a fluid at a certain pr... | 06/10/1997 |
| 5586444 | Control for commercial refrigeration system A compressor control system for a commercial refrigeration system includes a variable speed compressor and multiple fixed speed compressors. The control system calculates a variable which fluctuates according to the desired capacity of the system and is c... | 12/24/1996 |
| 5586574 | Air system control Control system for maintaining selected pressure in a gas distribution system including a header and multiple takeoffs from the header including a compressor to supply gas to the header at selected pressure range, a control valve in the header upstream of... | 12/24/1996 |
| 5503533 | Fluid level control panel structure for multi-pump system A multiple pump, multiple tank fluid control system incorporates a programmable processor which communicates with an operator input/output control panel which can be switched between each member of the plurality of tanks. Pump on and off levels for a sele... | 04/02/1996 |
| 5494112 | System for introduction of concentrated liquid chemical foamant into a water stream for fighting fires A fire fighting system introduces a liquid chemical foam concentrate into a water stream. The system may incorporate either or both of a hydraulic motor driven pump under control of a microprocessor-based hydraulic valve driver and an electric motor drive... | 02/27/1996 |
| 5484012 | Electronic apparatus having cooling system An electronic apparatus having a housing in which at least a heat source is housed, the housing being provided with an intake port and an exhaust port, the electronic apparatus comprising a cooling fan mounted in the exhaust port, an auxiliary cooling fan... | 01/16/1996 |
| 5425502 | VAV air conditioning system with a by-pass air supply fan A VAV air conditioning system has a micro-computer control device, a main fan motor, a by-pass fan motor, a heat exchange pipe assembly. The micro-computer control device has a function setting unit, temperature detecting units, a central processing unit ... | 06/20/1995 |
| 5417649 | Fluid transfusing device and method of control therefor A fluid transfusing device and method of control therefor includes a plurality of pump driving portions and a microprocessor. Each pump driving portion is for driving a pump, and the microprocessor controls the pump driving portions. The microprocessor ex... | 05/23/1995 |
| 5370799 | Elevated temperature-pressure flow simulator An apparatus and process for simulation of field fluid flow conditions under elevated temperature and pressure conditions of oil and gas production, refining, cooling towers, desalinization. The process involves evaluating inhibitor action in reduction of... | 12/06/1994 |
