Famous Patents
The first commercial microwave oven was nearly 6 feet tall and weighed in at 750 pounds.
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 |
| 7918238 | Flow controller and its regulation method A mass flow controller arranged to perform mass flow test operation in the controller itself by incorporating a test tank. The mass flow controller is provided, in a channel (6) for feeding fluid, with a means (8) for detecting the mass flow rate of fl... | 04/05/2011 |
| 7753066 | Single system for low or high pressure gases control and high or low pressure gases control valve “SINGLE SYSTEM FOR CONTROL OF HIGH OR LOW PRESSURE GASES FLOW RATE AND VALVE FOR CONTROL OF HIGH OR LOW PRESSURE GASES”, consists essentially in a system (S), which has active control of the movement of the valve (1) ram (P) solely by the concept of measu... | 07/13/2010 |
| 7321846 | Two-wire process control loop diagnostics A diagnostic device for coupling to a process control loop includes digital communication circuitry configured to receive a digital communication signal from the process control loop. The digital communication signal is a digitally modulated analog signal on the pro... | 01/22/2008 |
| 7290450 | Process diagnostics A diagnostic device for use in a industrial process includes monitoring electronics or diagnostic circuitry configured to diagnose or identify a condition or other occurrence in the industrial process. The system can be implemented in a process device such as a flow... | 11/06/2007 |
| 7268859 | Liquid measuring system Systems and methods for measuring the flow of a liquid along a conduit are disclosed. A heat source applies thermal energy to a portion of a liquid flowing along a conduit thereby elevating its temperature. A light source generates a first beam that passes through t... | 09/11/2007 |
| 7255012 | Process fluid flow device with variable orifice A process device providing total fluid flow control is provided. The device includes a closure mechanism disposed in a flow conduit. The closure mechanism, which is preferably an iris-type diaphragm, provides a variable internal diameter. The device includes a diffe... | 08/14/2007 |
| 7254518 | Pressure transmitter with diagnostics In one embodiment, a pressure transmitter is provided which diagnoses the condition of a primary element and/or an impulse line which connects to a pressure sensor. A difference circuit coupled to the pressure sensor has a difference output which represents the sens... | 08/07/2007 |
| 7243035 | System and method for mass flow detection device calibration Systems and methods for correcting measurements of fluid flow using device-specific information to compensate for differences between individual devices of the same design. In one embodiment, a method includes providing device-specific calibration data; sensing a fl... | 07/10/2007 |
| 7210495 | Gas line safety valve system A safety valve system includes a control valve connected to a gas meter and intersecting a gas flow path downstream of the gas meter and upstream of an entry point of a building. The control valve is adaptable between open and closed positions based upon received st... | 05/01/2007 |
| 7201066 | System for automatic tire inflation An apparatus and method for measuring gas flow rates and an improved automatic vehicle tire inflation system which utilizes the inventive gas flow measurement apparatus and method. The gas flow measuring apparatus and method utilize a porous media material effective... | 04/10/2007 |
| 7148796 | Environmental monitoring device The disclosure is directed to a sensor device including processing circuitry, at least one sensor coupled to the processing circuitry, a serial data interface coupled to the processing circuitry and memory responsive to the processing circuitry. The memory includes ... | 12/12/2006 |
| 7136767 | Apparatus and method for calibration of mass flow controller A mass flow sensor calibrator employs a variable-flow fluid source, a receptacle of known volume, and a pressure differentiator. The variable-flow fluid source supplies gas at varying rates to the mass flow sensor being calibrated and at proportional rates to a rece... | 11/14/2006 |
| 7125228 | Pressure washer having oilless high pressure pump An oilless high pressure pump suitable for use in devices such as pressure washers and the like is described. The pump includes an eccentric assembly suitable for converting rotary motion of a rotating shaft to rectilinear motion. One or more straps couple the eccen... | 10/24/2006 |
| 7114404 | System and method for detecting flow in a mass flow controller Systems and methods are provided for detecting flow in a mass flow controller (MFC). The position of a gate in the MFC is sensed or otherwise determined to monitor flow through the MFC and to immediately or nearly immediately detect a flow failure. In one embodiment... | 10/03/2006 |
| 7085610 | Root cause diagnostics An industrial process diagnostic apparatus is provided which can identify a source, or “root cause”, of an aberration in an industrial process. A plurality of process configuration models are provided which each represent a physical (or actual) implementation of... | 08/01/2006 |
| 7066022 | Airspeed sensor and method for operating an airspeed sensor In an air-velocity sensor and a method for operating an air-velocity sensor, the air-velocity sensor includes a temperature sensor arranged in an air flow and sequential electronics. The sequential electronics are used to cyclically impinge upon the temperature sens... | 06/27/2006 |
| 7054766 | Fluid properties evaluation Fluid flow properties often dictate the performance of processing operations. The present invention relates to a system for evaluating properties of a fluid flowing in a pipe. A test cell (20) which includes two parallel surfaces (5, 6) which are posit... | 05/30/2006 |
| 7046180 | Analog-to-digital converter with range error detection A circuit includes a multiplexer, an analog-to-digital converter, and a processor that compares a sequence of digital outputs from the analog-to-digital converter to a sequence of normal ranges that correspond with the digital outputs in order to provide an error ou... | 05/16/2006 |
| 7044229 | Downhole valve device A downhole valve device (1) in a drill string (14) in a petroleum well (2) and method for maintaining optimal annular fluid velocity and wellbore pressure. The device comprises a valve housing (20) connected between adjacent segments (... | 05/16/2006 |
| 7018800 | Process device with quiescent current diagnostics A process device for use on an industrial process control system includes a quiescent current sensor configured to sense quiescent current draw of the process device. Diagnostic circuitry determines a diagnostic condition of the process device as a function of the s... | 03/28/2006 |
| 7010459 | Process device diagnostics using process variable sensor signal A diagnostic device for use in a process control system receives a sensor signal related to a process variable of a process sensed by a process variable sensor. A signal preprocessor provides a sensor power signal output as a function of a frequency distribution of ... | 03/07/2006 |
| 7004191 | Apparatus and method for mass flow controller with embedded web server A mass flow controller includes an electronic controller that provides a web server that allows access to the web server through such interworking networks as the Internet. ... | 02/28/2006 |
| 6948508 | Apparatus and method for self-calibration of mass flow controller A mass flow controller includes a mass flow sensor and a calibrator configured to perform a self-calibration on the mass flow controller. The calibrator generates flow measurements that are used as “standards” and flow measurements from the mass flow sensor are ... | 09/27/2005 |
| 6940409 | Fluid flow detector A method and apparatus for monitoring fluid flow in a pipe or at an exit of the pipe and detecting a fault. The system includes an acoustic generator which is activated by the fluid flowing in the pipe or at the exit of the pipe. The acoustic generator sends an acou... | 09/06/2005 |
| 6920799 | Magnetic flow meter with reference electrode An magnetic flow meter is provided which includes a reference electrode configured to electrically couple process fluid flowing within a flowtube of the flow meter. The reference electrode is adapted to measure potential of the process fluid. A current limiter is co... | 07/26/2005 |
| 6913031 | Pulse shot type flow controller and pulse shot type flow controlling method A flow controller and a flow controlling method are adapted to be released from conventional restrictions by using a novel type called a pulse shot type. A pulse shot (opening/closing operation of a first cutoff valve (12) and, after that, opening/closing ope... | 07/05/2005 |
| 6907383 | Flow diagnostic system A flow diagnostic system for a flow sensing element and impulse lines. A pressure transmitter coupled to the impulse lines provides digital pressure data to a control system. The control system provides the pressure data and real time clock readings to a diagnostic ... | 06/14/2005 |
| 6827236 | Dual piston/poppet flow switch A dual piston/poppet valve in a fuel dispenser works with a two-stage valve to help eliminate errors from an inferential flow meter. When the two-stage valve opens partially, a secondary fuel path is opened in the dual piston/poppet valve. A sensor detects the openi... | 12/07/2004 |
| 6789558 | Digitally controlled direct drive valve and system and method for manufacturing the same An electrical command signal to a direct drive valve is compensated by a digital signal processor to cause the output hydraulic fluid flow from the valve to conform to a desired predetermined flow. The compensation is accomplished by measuring flow from the valve us... | 09/14/2004 |
| 6782906 | Time based mass flow controller and method for controlling flow rate using it A time based mass flow controller controls the volume flow and mass flow accurately based on time. The time based mass flow controller includes at least one reservoir 1, at least one inlet valve 13, each inlet valve 13 opening/closing an inlet o... | 08/31/2004 |
| 6752928 | Flow matching method and system using two transducers A property of unconnected first and second fluid flows is matched, such as, but not limited to, matching the flow rate of the replacement water stream with the waste water stream in kidney dialysis. The first and second flow paths are interconnected so substantially... | 06/22/2004 |
| 6746606 | Method and system for matching flow rate A flow rate of unconnected first and second fluid flows is matched, such as, but not limited to, matching the flow rate of the replacement water stream with the waste water stream in kidney dialysis. The first and second flow paths are interconnected so substantiall... | 06/08/2004 |
| 6736881 | Method and arrangement for cleaning pipe-shaped filter elements In a method and apparatus for cleaning pipe-shaped filter elements arranged in a housing including a separation wall dividing the housing into a clean gas space and a raw gas space into which the filter elements extend from the clean gas space through the separation... | 05/18/2004 |
| 6681787 | System and method of operation of a digital mass flow controller The mass flow controller of the present invention includes a sensor. This sensor is used to detect a mass flow within a gas line. Additionally, this sensor provides an output to an electronic control system coupled to the sensor. The electronic control sy... | 01/27/2004 |
| 6655408 | Tunable ramp rate circuit for a mass flow controller A method and apparatus for stabilizing startup gas flow through an MFC supplying reactant gases to a semiconductor system, wherein the method includes receiving a gas setpoint in a tunable activation circuit, determining a desired valve control voltage co... | 12/02/2003 |
| 6640822 | System and method of operation of a digital mass flow controller The mass flow controller of the present invention includes a sensor. This sensor is used to detect a mass flow within a gas line. Additionally, this sensor provides an output to an electronic control system coupled to the sensor. The electronic control sy... | 11/04/2003 |
| 6543466 | Mass flow controller and method of operation of mass flow controller A mass flow controller has a sensor section that generates an electrical signal, dependent on the measured flow rate. The controller sends a control signal to a magnetic field generating unit, dependent upon the actual flow rate and the desired flow rate,... | 04/08/2003 |
| 6539968 | Fluid flow controller and method of operation A fluid mass flow controller, particularly adapted for controlling mass flow rates of toxic and reactive gases used in semiconductor device fabrication, includes a control circuit connected to pressure sensors for sensing the differential pressure across ... | 04/01/2003 |
| 6443174 | Fluid mass flow control valve and method of operation A fluid mass flow control apparatus, particularly adapted for use in controlling fluid flow to semiconductor fabrication processes, comprises a tubular body part having inlet and outlet fittings and a bore extending therethrough and supporting a valve sea... | 09/03/2002 |
| 6439254 | Mass flow controller automation method and related system An MFC controlling device automation method and related system. The method mainly comprises the steps of automatically controlled algorithmic obtaining of MFC open loop system parameters by an identification technique; automatically controlled algorithmic... | 08/27/2002 |
