Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7290433 | Method and device for checking a sensor In an industrial installation equipped with a sensor, a method is provided for checking the sensor and providing a measurement sequence associated with the sensor. Monitoring occurs for a thermodynamic parameter of a monitored fluid circulating in the industrial ins... | 11/06/2007 |
| 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 |
| 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 |
| 6813925 | Calibration method and system for a dynamic combustor sensor In one embodiment, the invention is a pressure sensor calibration system comprising a pressure chamber in fluid communication with a pressure sensor to be calibrated, the chamber is pressurized to a static pressure level. An oscillating surface on a wall of the cham... | 11/09/2004 |
| 6672130 | 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 cont... | 01/06/2004 |
| 6640614 | Package burst pressure simulator An apparatus and method for simulating a package pressure burst condition for calibrating a package pressure burst detector, where the package pressure burst detector is connected to a pressure tank, and the detector applies an air flow into the tank to g... | 11/04/2003 |
| 6038912 | Failure detection system of pressure sensor A determination as to whether or not the absolute value PCHK of the deviation between a detection value PTANK of a pressure sensor and its average value PTANKAVE exceeds a predetermined pressure DLEAKCHK is repeated within a predetermined time TINTVAL. Th... | 03/21/2000 |
| 5837881 | Pressure gauge calibrating device The invention relates to a pressure source calibrator which allows testing and calibrating of a pressure gauge or other device mounted in a particularly difficult-to-access area. The calibrator is lightweight, portable and operates with an external source... | 11/17/1998 |
| 5620005 | Calibration apparatus for the pressure gauges of a whole-body plethysmograph A whole-body plethysmograph having a calibration of the pressure gauge is provided, which includes an air tight, lockable cubicle for the reception of a person to be examined, a cubicle-pressure pressure gauge that responds to the interior pressure of the... | 04/15/1997 |
| 5554801 | Diagnosis apparatus and method for a cylinder pressure sensor Conditions where there is inertial rotation of an engine after switching off an ignition switch, and an opening of a throttle valve disposed in an intake system of the engine is constant, are made diagnosis conditions. When these diagnosis conditions are ... | 09/10/1996 |
| 5553481 | Pressure detecting apparatus of injection molding machine A pressure detecting apparatus of an injection molding machine is utilized for always keeping an accurate zero adjustment point and accurately and precisely detecting pressure without being influenced by temperature drift. The pressure detecting apparatus... | 09/10/1996 |
| 5402669 | Sensor matching through source modeling and output compensation A method for matching the second output of a second sensor to the first output of a first sensor wherein a source transducer is driven by a reference analog or digital electrical signal to produce the physical quantity (e.g., acoustic pressure) the sensor... | 04/04/1995 |
| 5046352 | Displacement cube calibrator device A device for calibrating cubes which are used in the determination of the magnitude and pressure of an air blast having a base, a pedestal mounted on the base, a pendulum pivotally attached near the top of the pedestal, a box end for holding the cube at t... | 09/10/1991 |
| 4506539 | Dynamic pressure comparator A dynamic pressure comparator for calibrating high frequency pressure transducers used for the measurement of rocket motor combustion instability and other transient phenomena includes an acoustic cylindrical cavity through which a jet stream of nitrogen ... | 03/26/1985 |
| 4464123 | Arm simulator for an oscillometric blood pressure monitor A device for simulating the pressure readings obtained from the arm of a living subject whose blood pressure levels are being determined by an oscillometric blood pressure monitor, includes a pulse pressure chamber for generating pressure pulses at a rate... | 08/07/1984 |
| 4372148 | Generating apparatus for a variable fluid pressure A device for generating a variable frequency, variable pressure in a blood pressure measuring system to test the system for resonance or damping. The device includes within a container an opening for connection to a source of constant pressure, an exit op... | 02/08/1983 |
| 4347410 | Microphone droop and sensitivity measurement device A device for measuring microphone sensitivity and droop by subjecting the microphone to a negative step function input and recording the microphone electrical response thereto. The microphone is surrounded by an inflated thin, flexible, expandable membran... | 08/31/1982 |
| 4189936 | Pressure generator A variable volume pressure wave generator including a drive magnet; a low mass, drive coil for energization by an electrical analog of a pressure wave to be simulated and driven by interaction with a magnet; a low mass, high compliance drive coil suspensi... | 02/26/1980 |
| 4009604 | Pressure converter for calibrating gauges Pressure converter for use between a hydraulic load sensing element and a gauge or other device to indicate a property of the load directly in desired units. The pressure converter comprises a first force-pressure transducer connected hydraulically to the... | 03/01/1977 |
