Famous Patents
The ice cream cone was invented at the St. Louis Worlds Fair by Ernest Hamwi in 1904. His waffle booth was next to an ice cream vendor who ran short of dishes. Hamwi rolled a waffle to hold ice cream and the cone was born.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7358700 | Induction motor controller An induction motor controller that may include three phase paths leading from a power input to a power output, a solid-state switching device interposed between the power input and the power output on each of the three phase paths, a voltage sensor coupled to two of... | 04/15/2008 |
| 7339487 | Structure of meter An improved structure of meter, comprising a casing, a circuit board provided in the casing and having a connecting unit for connecting to an external machine, a central processor provided on the circuit board for transmitting the signals among individual unit and m... | 03/04/2008 |
| 7335334 | Active air removal from an extracorporeal blood circuit A disposable, integrated extracorporeal blood circuit employed during cardiopulmonary bypass surgery performs gas exchange, heat transfer, and microemboli filtering functions in a way as to conserve volume, to reduce setup and change out times, to eliminate a venous... | 02/26/2008 |
| 7326186 | Injector system and fluid control device providing sharp bolus injection An injector system includes a source of injection fluid, a pump device, a fluid path set disposed between the source of injection fluid and the pump device, and a fluid control device operatively associated with the fluid path set. The fluid control device is adapte... | 02/05/2008 |
| 7276870 | Arrangement for overload protection and method for reducing the current consumption in the event of mains voltage fluctuations The arrangement as overload protection for the mains voltage (U) comprises an electric motor (1), a compression unit having a compressor (2), a mains voltage-monitoring unit (3), a device for reducing the load on the motor (1) and a contr... | 10/02/2007 |
| 7270744 | Automated low-volume tangential flow filtration process development device An automated process development device providing flexibility and accuracy for the investigative development of tangential flow filtration (tff) processes and used for evaluating the process parameters of a laboratory scale tff process with an eye towards developing... | 09/18/2007 |
| 7217360 | Multi column chromatography system The present invention relates to a method and apparatus for chromatographically analyzing each of a plurality of samples in detector, comprising an autosampler to contain a plurality of samples for chromatographic analysis and a plurality of chromatographic systems,... | 05/15/2007 |
| 7204958 | Extracorporeal blood circuit air removal system and method A disposable, integrated extracorporeal blood circuit employed during cardiopulmonary bypass surgery performs gas exchange, heat transfer, and microemboli filtering functions in a way as to conserve volume, to reduce setup and change out times, to eliminate a blood ... | 04/17/2007 |
| 7201870 | Active air removal system operating modes of an extracorporeal blood circuit A disposable, integrated extracorporeal blood circuit employed during cardiopulmonary bypass surgery performs gas exchange, heat transfer, and microemboli filtering functions in a way as to conserve volume, to reduce setup and change out times, to eliminate a venous... | 04/10/2007 |
| 7198751 | Disposable, integrated, extracorporeal blood circuit A disposable, integrated extracorporeal blood circuit employed during cardiopulmonary bypass surgery performs gas exchange, heat transfer, and microemboli filtering functions in a way as to conserve volume, to reduce setup and change out times, to eliminate a venous... | 04/03/2007 |
| 7189352 | Extracorporeal blood circuit priming system and method A disposable, integrated extracorporeal blood circuit employed during cardiopulmonary bypass surgery performs gas exchange, heat transfer, and microemboli filtering functions in a way as to conserve volume, to reduce setup and change out times, to eliminate a venous... | 03/13/2007 |
| 7150711 | Method for controlling an assist pump for fluid delivery systems with pulsatile pressure Method for controlling an assist pump for fluid delivery systems with pulsatile pressure. If for example a heart assist pump is driven with a constant number of revolutions, it is achieved, that the blood is also delivered through the assist pump, even when the hear... | 12/19/2006 |
| 7145262 | Wind turbine generator system A wind turbine generator system is equipped with a three phase generator connected to a shaft of a windmill, a converter connected to a stator of the generator, and an inverter connected to the converter and also to an electric power system. The system extracts a to... | 12/05/2006 |
| 7117120 | Control system for centrifugal pumps A control system for the operation of a centrifugal pump which may be used for production of gas and/or oil from a well. The control system includes vector feedback model to derive values of torque and speed from signals indicative of instantaneous current and volta... | 10/03/2006 |
| 7095132 | Wind turbine generator system An object of the present invention is to minimize the torsional vibration caused on the shafting of the wind turbine genarator system so as to operate the windmill stably. A wind turbine genarator system according to the present invention, equipped with a syn... | 08/22/2006 |
| 7018540 | Multi column chromatography system The present invention relates to a method and apparatus for chromatographically analyzing each of a plurality of samples in detector, comprising an autosampler to contain a plurality of samples for chromatographic analysis and a plurality of chromatographic systems,... | 03/28/2006 |
| 7004924 | Methods, systems, and kits for the extracorporeal processing of blood Methods, systems, and kits for extracorporeally circulating and processing blood are described. The systems include a pump, a processing unit, and blood drawn return lines for accessing a patient's vasculature. Blood flow through the return line is measured and pump... | 02/28/2006 |
| 6997683 | High pressure reciprocating pump and control of the same Pumping for chromatograph applications calls for constant flow at high pressures and for accurate control of liquid composition. A two-cylinder pump, and associated controls provide an accurate, fixed flow rate. During the initial portion of the pumping stroke of a ... | 02/14/2006 |
| 6966759 | Compressor diagnostic and recording system A compressor diagnostic system incorporates a control which receives a plurality of data streams about various operational features of the compressor. As an example, both temperature and pressure of the suction and discharge refrigerant are taken and sent to the con... | 11/22/2005 |
| 6964558 | Compressor utilizing low volt power tapped from high volt power Low voltage electrical power is supplied to a diagnostic control device in a sealed compressor. Electrical power is tapped from a high voltage power line and transformed to low voltage power that in turn operates the diagnostic control device. The diagnostic control... | 11/15/2005 |
| 6965814 | Pool cleaning apparatus A system for determining the effectiveness of the filtering and maneuverability of a robot for cleaning swimming pools, the robot includes a robot propelling motor, at least one water pump having an impeller and an impeller motor, a pool water inlet leading to a fil... | 11/15/2005 |
| 6758655 | Process for determining a reference characteristic for controlling a pump In the process according to the invention for determining a nominal values curve of an installation (Hinstallation(Q), Pinstallation(Q)) for controlling the pump capacity of a pump (6) driven by an electric motor (10) with speed c... | 07/06/2004 |
| 6564627 | Determining centrifugal pump suction conditions using non-traditional method A method for determining the suction pressure of a centrifugal pump including the steps of determining pump torque and pump discharge pressure at at least two different speeds, forming a first order wave curve as a straight line using said pump torque and... | 05/20/2003 |
| 6464464 | Apparatus and method for controlling a pump system A controller for controlling operating parameters associated with fluid flow, speed or pressure for a centrifugal pump for pumping fluid, wherein at least one sensor is coupled to the pump for generating a signal indicative of a sensed operating condition... | 10/15/2002 |
| 6406265 | Compressor diagnostic and recording system A compressor diagnostic system incorporates a control which receives a plurality of data streams about various operational features of the compressor. As an example, both temperature and pressure of the suction and discharge refrigerant are taken and sent... | 06/18/2002 |
| 6264431 | Variable-speed motor drive controller for a pump-motor assembly A liquid pump system for providing liquid to a tank includes a variable-speed motor drive and a control circuit coupling the variable-speed motor drive to a power source. The control circuit has a switch that may be disposed in a state according to the am... | 07/24/2001 |
| 6238188 | Compressor control at voltage and frequency extremes of power supply A method is presented to prevent compressor damage by reducing compressor load when operating speed either is too low or too high as can be the case at extremes of line frequency and voltage. The speed of the compressor is deduced from the knowledge of co... | 05/29/2001 |
| 6210119 | Reverse rotation detection compressors with a preferential direction of rotation A method is disclosed for identifying when a compressor is being run in reverse due to improper wiring. In a preferred embodiment, sensors sense the condition of a refrigerant at the inlet line and a refrigerant at the outlet line. If an expected pressure... | 04/03/2001 |
| 6193470 | Method of operating a radial compressor set with intake and discharge flow control A method of operating a radial compressor wherein the output pressure and the throughput m through a radial compressor are measured and the working point A in the operational characteristic diagram of the compressor is determined. For predetermined settin... | 02/27/2001 |
| 6056510 | Multistage vacuum pump unit A multistage vacuum pump unit having a plurality of separate single-stage pumps connected in series with each other by exhaust pipes, the exhaust pipes each connecting a suction port of one of the adjacent single-stage pumps with an exhaust port of anothe... | 05/02/2000 |
| 5947689 | Automated, quantitative, system for filtration of liquids having a pump controller A system is provided for proceeding with automated filtration of liquids in a manner which allows for quantitative collection of desired filtrates or permeates. The system, as well as its associated method, monitors various parameters which are fed to a p... | 09/07/1999 |
| 5923102 | Automatic sub-floor pumping system An automatic sub-floor pumping system, having a controller box, sensor wires, suction hose and pump. Two or three sensor probes are used--the lowest, or ground, probe can be omitted, and the circuit referenced to earth or wiring ground. The pump evacuates... | 07/13/1999 |
| 5791880 | Infusion pump having power-saving modes An infusion apparatus includes a pump powered by a source of battery power and capable of operating in a plurality of infusion modes and operating in a power savings mode. The infusion apparatus further includes sensors which sense various conditions of t... | 08/11/1998 |
| 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 |
| 5553997 | Control method and apparatus for a centrifugal chiller using a variable speed impeller motor drive A method of controlling the operation of a centrifugal compressor in a water chiller system. The compressor's capacity is variable by modulating its speed of rotation or by modulating its inlet guide vane's position. The water chiller includes an evaporat... | 09/10/1996 |
| 5538396 | Water pumping system A hydraulic pressure booster device suited for increasing in-line fluid pressures comprises the assembly of a vertically oriented, tubular, closed end, housing for a submersible fluid pump. The pump is secured to a cap flange which closes the top of the t... | 07/23/1996 |
| 5392539 | Hydraulic drive system for construction machine In a hydraulic drive system for a construction machine, first flow control mechanism includes first and second flow control valves (11a, 11b) and first interlock mechanism (54, 55) for interlocking the first and second flow control valves with first direc... | 02/28/1995 |
| 5393202 | Process and device for optimizing the transfer by pumping of multiphase effluents Transfer by pumping of effluents containing at least one gas phase and at least one liquid phase in a transfer line connecting a source of effluents is optimized by interposing on the line, between the source and the point of designation, a multiphase pum... | 02/28/1995 |
| 5355691 | Control method and apparatus for a centrifugal chiller using a variable speed impeller motor drive A controller for controlling the capacity of a centrifugal chiller compressor. The compressor is driven by an electric motor and has variable inlet guide vanes that control the flow of refrigerant to the compressor. The controller establishes a dimensionl... | 10/18/1994 |
| 5336051 | Inline non-invasive pressure monitoring system for pumps The invention is a pressure sensitive valve that in different forms can be used to provide: an adjustable resistance to flow, adjustable positive or negative pressure relief, negative pressure isolation, isolation of pressure sensitive devices (e.g. press... | 08/09/1994 |
