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| Number | Title | Issue Date |
| 7266986 | Portable system for measuring dynamic pressure in situ and method of employment therefor A dynamic pressure testing or calibration system packaged as a portable unit for characterizing pressure sensors, such as transducers. Embodiments are packaged for carry on the body, are battery-operated, compatible with existing transducer mounts, and quickly learn... | 09/11/2007 |
| 7249487 | Device for calibrating a pressure detector Device for calibrating a pressure detector, particularly an infrasonic pressure detector. This device includes measurement means for applying to this detector a reference pressure which varies depending on time and all of whose spectrum components covering a predete... | 07/31/2007 |
| 7101277 | Control system and method for controlling aircraft cabin altitude during aircraft operations above maximum certified aircraft altitude A cabin pressure control system and method extends the cabin pressure control logic beyond the original maximum certified altitude of the aircraft, without having to update the control logic. Thus, the control system provides an independent means of limiting cabin-t... | 09/05/2006 |
| 7086271 | Vacuum generating method and device A test device and method for drawing a vacuum relative to an ambient environment. The device includes a member defining a passage, a valve, and a fluid communication conduit. The passage extends between a first end and a second end, and includes a constriction defin... | 08/08/2006 |
| 7013702 | Dynamic pressure generator A device, system, and method for determining the sensing performance of pressure-sensing devices. The device generates dynamic pressure waveforms that enable researchers and medical personnel to accurately assess the characteristics and performance of a particular p... | 03/21/2006 |
| 6955184 | Pneumatic generator system for simulating operating conditions of an aircraft A pneumatic function generator system for maintaining a desired pressure and/or a desired rate of pressure change with respect to time. The pneumatic function generator system may include a servo valve for controlling the amount of fluid traveling therethrough, a pr... | 10/18/2005 |
| 6938456 | Vacuum generating method and device including a charge valve and electronic control A vacuum generating device and method include a member that defines a passage, a first valve, a second valve, a fluid communication conduit, a transducer, and a processor. The passage extends between a first end and a second end, and includes a constriction that def... | 09/06/2005 |
| 6895799 | Pressure generator for portable instrument A compact, portable and NIST traceable pressure source dynamically generates very low pressures includes at least one adjustable valves in-line with a fluid, such as air, flowing through the valve. A differential pressure is created across a pressure control device ... | 05/24/2005 |
| 6651481 | Method and apparatus for characterizing pressure sensors using modulated light beam pressure Embodiments of apparatuses and methods are provided that use light sources instead of sound sources for characterizing and calibrating sensors for measuring small pressures to mitigate many of the problems with using sound sources. In one embodiment an ap... | 11/25/2003 |
| 5800359 | NIBP playback system A data playback device which records, stores, and plays back actual patient oscillometric blood pressure data to create a more realistic NIBP simulation for testing of an NIBP monitor. The system is made up of two units, a computer and a converter. The co... | 09/01/1998 |
| 5257640 | Fine pressure control system for high pressure gas A system for precisely controlling gas under high pressure produces an initial gas pressure in a pressure chamber while applying a predetermined amount of power to a heating element located in the pressure chamber and then applies a computed change of pow... | 11/02/1993 |
| 5027641 | Oscillometric non-invasive blood pressure simulator An apparatus for evaluating the performance characteristics of an oscillometric blood pressure monitor is presented. In accordance with the present invention, a novel closed-loop system is used to synthesize physiologically-correct pneumatic pulse wavefor... | 07/02/1991 |
| 5016466 | Test apparatus and method for blood pressure measuring equipment The present invention discloses apparatus and method for testing and verifying the accuracy of non-invasive and invasive blood pressure measuring equipment. The apparatus includes pneumatic and electronic components that simulate the delivery of systolic ... | 05/21/1991 |
| 4856317 | Vacuum calibration system and method for fiberoptic pressure transducer A system and method for initializing and calibrating a fiber optic pressure transducer so that a measured intensity of light which varies as a function of pressure can be accurately translated to the value of pressure which produces that value of light in... | 08/15/1989 |
| 4811252 | Leakage test equipment Leak test equipment which includes a master side pneumatic system and a work side pneumatic system executes a leakage test sequence basically including pressurizing, balancing and detecting steps under control of a microcomputer. A nonvolatile read/write ... | 03/07/1989 |
| 4698997 | Oscillation pressure device for dynamic calibration of pressure transducers Method and apparatus for obtaining dynamic calibrations of pressure transducers. A calibration head (15), a flexible tubing (23) and a bellows (20) enclose a volume of air at atmospheric pressure with a transducer (11) to be calibrated subject to the pres... | 10/13/1987 |
| 4664635 | Simulation device A test device for electronic pressure gauges used by underwater divers is described. The device, comprised of a pressure transmitter which is capable of being connected to the electronic pressure gauge's sensor, is used to simulate the pressure encountere... | 05/12/1987 |
| 4658829 | Method and apparatus for pressure transducer calibration and simulation A method and apparatus for verifying the calibration of a pressure transducer in a pressure monitoring system and for isolating defective electrical components of the monitoring system. The apparatus includes a manually operable pressure cylinder for gene... | 04/21/1987 |
| 4552011 | Establishing a differential pressure across a core sample or calibrating a differential pressure transducer Transmission and reception of sonic waves and the adjustment of the water level in columns are utilized to establish a desired differential pressure across a core sample. The technique utilized to establish a desired differential pressure across a core sa... | 11/12/1985 |
| 4476707 | Gas flow measurement with detented chopper valve A gas flow measuring system employs an oscillating chopper valve alternately to deliver a flow head-generated pressure and a reference pressure to a pressure transducer. The chopper valve is driven by a stepping motor under the control of a microcomputer.... | 10/16/1984 |
| 4471646 | Blood pressure cuff calibration system An apparatus for measuring the pressure-transmitting characteristics of a blood pressure cuff in terms of delivered cuff pressure. It consists of a somewhat flexible cylindrical supporting tube containing a non-compressible liquid, connected to a pressure... | 09/18/1984 |
| 4349885 | Set pressure measuring system A device for measuring the set pressure of a safety valve coupled to a pressure line, where the valve includes a springloaded closure element which is normally biased to close a port of the pressure line. The device includes a position transducer which ge... | 09/14/1982 |
| 4102175 | Response time verification of in situ hydraulic pressure sensors in a nuclear reactor Method and apparatus for verifying response time in situ of hydraulic pressure and pressure differential sensing instrumentation in a nuclear fluid circuit is disclosed. Hydraulic pressure at a reference sensor and at an in situ process sensor under test ... | 07/25/1978 |
| 4086804 | Precision pneumatic pressure supply system A dual closed loop, precision pneumatic pressure selection, control and display system for use in testing pneumatic apparatus provides precision digital high response analog control of a precision pneumatic valve for establishing, maintaining, and display... | 05/02/1978 |
