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"That the automobile has practically reached the limit of its development is suggested by the fact that during the past year no improvements of a radical nature have been introduced."
Scientific American ; Jan. 2 edition, 1909
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| Number | Title | Issue Date |
| 7347099 | Pressure transducer with external heater An improved pressure transducer is disclosed. The transducer includes a connector, an enclosure, a sensor portion, and an external heater disposed to heat the sensor portion. In some aspects, the sensor portion includes a sensor constructed from a brittle material a... | 03/25/2008 |
| 7340967 | Device for measuring a mass flow rate of a particulate material A device for measuring a mass flow rate of a flow of particulate material which moves in a predetermined direction. The device includes a weighing cell, a first apparatus, a second apparatus, and a third apparatus. The weighing cell includes a tubular wall and is di... | 03/11/2008 |
| 7328609 | Wireless pressure sensing Schrader valve A wireless tire pressure sensing system based upon a Schrader valve design is provided. The system includes a valve body, a valve pin and a compression element for sealing engaging the valve body and the valve pin to maintain tire pressure. A pressure sensing device... | 02/12/2008 |
| 7313973 | Flow sensor and fire detection system utilizing same In a fire sprinkler system, flow sensors are used having strain gauges mounted on supports which project into the sprinkler pipes. When water flow occurs, the supports bend, changing the strain gauge resistance and producing a signal which can be analyzed to indicat... | 01/01/2008 |
| 7313945 | Cantilevers for sensing fluid properties A system for sensing a property of a fluid comprises a fluid channel operable to receive the fluid therein, a flexible arm having a free end positioned within at least a portion of the fluid channel, a fluid actuator disposed sufficiently close to the flexible arm s... | 01/01/2008 |
| 7293466 | Bolt with function of measuring strain A bolt with a function of measuring strain, comprising a Wheatstone bridge circuit comprising a strain sensor and a dummy resistor, a translate circuit that amplifies a signal from the Wheatstone bridge circuit to convert the same into a digital signal, a transmitti... | 11/13/2007 |
| 7168330 | Multi-parametric media transducer A multi-parametric transducer is provided. In one aspect of the invention, the multi-parametric transducer includes an enclosure having an inner bore that defines a port, an inner chamber coaxial with the inner bore and disposed in the enclosure, and a sensing tube ... | 01/30/2007 |
| 7152469 | Fluid flow sensor, method and system A fluid flow sensor, a method of detecting flow/no flow and flow systems employing same are provided. In one embodiment, an infrared light emitting diode (“LED”), phototransistor, rigid housing and a flexible opaque diaphragm are used. The diaphragm opens upon a... | 12/26/2006 |
| 7140261 | Acoustic wave flow sensor An acoustic wave flow sensor is disclosed, which includes a sensor substrate and an acoustic wave diaphragm etched upon the sensor substrate, wherein mechanical stress or strain is concentrated in the acoustic wave diaphragm. One or more interdigital transducers can... | 11/28/2006 |
| 7127953 | Target flow meters A target flow meter has a target with a broad face attached to the free end of a rigid stalk. A fixed end of the stalk is attached to a rigid support secured in the system to be measured with the broad face of the target disposed transverse to the fluid flow. The su... | 10/31/2006 |
| 7121299 | Regulator valve with flow indicator for a hot-water heating system The valve includes an intake duct (13) for conveying water into the valve, an externally projecting tubular body (20) of a transparent with an internal cavity (21) and a flow indicator rod (40), slidable inside the valve, with a lower por... | 10/17/2006 |
| 7121146 | MEMS pressure sensing device A pressure sensing system formed in a monolithic semiconductor substrate. The pressure sensing system comprises a pressure sensing device formed on the monolithic semiconductor substrate. Pressure sensing device is adapted to be disposed in an environment for develo... | 10/17/2006 |
| 7121147 | Force detection device Forces and moments are detected in a distinguishing manner by a simple structure. A supporting member (20) is positioned below a force receiving member (10), which receives forces to be detected, and between these components, at least two columnar forc... | 10/17/2006 |
| 7107184 | Strategies for analyzing pump test results Strategies are described for analyzing test data received from tests performed on a fire pump, and then automatically computing an overall grade (e.g., excellent, good, fair, or poor) which reflects how the analyzed test data compares with reference data. A standard... | 09/12/2006 |
| 7091628 | System for harvesting rotational energy from fluid flow in a pressurized system A predetermined portion of the energy available in a flowing fluid within a pipe is converted to torque in a rotating system outside the pipe. The rotational energy thus obtained is available to other uses at the end-user's discretion. A preferred embodiment compris... | 08/15/2006 |
| 7024945 | Flow sensing apparatus A flow sensing apparatus for detecting fluid flow rate and direction is described. The flow sensing apparatus includes a flow-responsive element projecting into the fluid flow path, and a position sensor which detects the degree and direction of any change in positi... | 04/11/2006 |
| 7021151 | MEMS pressure sensing array with leaking sensor A pressure sensing system formed in a monolithic semiconductor substrate. The pressure sensing system comprises a pressure sensing device formed on the monolithic semiconductor substrate. Pressure sensing device is adapted to be disposed in an environment for develo... | 04/04/2006 |
| 7017425 | Bucket wheel assembly for fluid flow meters An improved bucket wheel assembly with a center frame, having a plurality of fingers extending therefrom. In each of the fingers a slot is formed. The assembly also includes a plurality of conically shaped hollow cups. The hollow cups each have a wall that forms an ... | 03/28/2006 |
| 7004038 | Fiber optic flow meter A metering module, or a system employing such, for monitoring fluid flow with a laser light source, a light detector and a processor, wherein the fluid may be a gas or liquid. A valve section and a grating section including a fiber Bragg grating (FBG) are provided. ... | 02/28/2006 |
| 6959611 | Flow meter having a rebounding plate with a filter assembly A flow meter, particularly for warm water heating systems, includes a measuring element and an indicator element. The indicator element has a basic component with a cylindrical attachment extending into the collector pipe. An indicator rod with a rebounding plate ex... | 11/01/2005 |
| 6681645 | Moving target flow meter A target-type flow meter uses a target in a flowing fluid and selectively changes the orientation of the target with respect to the direction of flow of the fluid between two or mote orientations, where the target provides a different flow impedance in ea... | 01/27/2004 |
| 6631648 | Microfluidic flow sensing method and apparatus Sensing of microfluidic flow is carried out by confining and directing a fluid along a surface in a primary direction of flow past a cantilever beam which is mounted at one end of the beam to the surface. The cantilever beam has opposite beam surfaces tha... | 10/14/2003 |
| 6591697 | Method for determining pump flow rates using motor torque measurements A method and system for determining fluid flow rates through a motor driven pump controlled by a variable speed drive is disclosed. The variable speed motor drive is used to characterize a pump fluid flow for a plurality of motor torque values at a plural... | 07/15/2003 |
| 6584863 | Device for measuring fluid flow through a pipe or open channel An assembly for measuring fluid flow is provided having a base plate with an upstanding wall and a cut-out opening. A pivot shaft extends from the wall and a swinging arm is attached to the pivot shaft. At the lower end of the arm is a barrel shaft which ... | 07/01/2003 |
| 6435040 | Inertial flow sensor and method A transmitting electro-mechanical transducer is energized by electric pulses at a low frequency (typically several hertz to several kilohertz) to provide corresponding pulses of movement in the fluid. The fluid movement displaces a volume of the fluid in ... | 08/20/2002 |
| 6345540 | Fluid flow meter A fluid flow meter has a semi-conducting substrate and a number of integral flexible tines orientated across an aperture in the substrate to deflect in the direction of the fluid flow by an amount dependent on that fluid flow. Piezo-resistive regions are ... | 02/12/2002 |
| 6295810 | Hydrostatic drive system A hydrostatic drive system with an adjustable pump in the delivery flow has at least one consuming device connected to the pump. Associated with each consuming device are actuation devices that specify the direction of movement and the speed of movement. ... | 10/02/2001 |
| 6256986 | Hydrostatic drive system A hydrostatic drive system with a pump and at least one consuming device that is connected to the pump can be actuated by a control valve. The control valve can be actuated as a function of an actuator that specifies a desired speed of movement and a dire... | 07/10/2001 |
| 6253625 | Target flow meters with immersed strain gauges A target flow meter has a target with a broad face attached to the free end of an elastic stalk. The stalk has at least a portion with an oblong cross section. A fixed end of the stalk is attached to a rigid support secured in the system to be measured wi... | 07/03/2001 |
| 6239446 | Fluid flow detector The indication that water is flowing in a fire protection sprinkler riser is often used as an initial indication that a fire has occurred in the protected building. The subject invention is an improved water flow switch, that uses a paddle with a reflecti... | 05/29/2001 |
| 6212958 | Flow sensing assembly and method A flow sensing assembly for detecting the presence of fluid flow includes a sensor body having a flow passage therethrough and a resilient blade having an end which is fixed relative to the sensor body and an end which is freely movable. The blade extends... | 04/10/2001 |
| 6055869 | Lift force fluid flow sensor for measuring fluid flow velocities A fluid flow sensor uses lift forces exerted on a plate-like airfoil member to determine the velocity of a fluid flowing past the sensor. The member has a pair of spaced, low aspect ratio airfoil elements. A central portion of the airfoil member is couple... | 05/02/2000 |
| 6009762 | Fluid flow detector A system and method for determining a volume rate fluid, particularly liquid such as sewage, comprises a conduit for passage of sewage, a freely pivotable flap valve mounted at an outlet of the conduit and carrying a sensor. This sensor monitors the angul... | 01/04/2000 |
| 5970802 | Relating to mass flow measuring apparatuses In the field of mass flow measuring apparatuses, it is known to provide a sensor member for the establishment thereon of streamline flow of bulk material, in which the sensor member design is optimised in order to minimise the effects of changes in the co... | 10/26/1999 |
| 5959218 | Method and device for measuring the flow of bulk materials The disclosure relates to improved methods of designing surfaces whereby to minimize the effects of changes in the coefficients of friction between so-called bulk fluids and the surfaces. The disclosure also relates to surfaces designed in accordance with... | 09/28/1999 |
| 5945608 | Hall effect fluid flow switch and flow meter A fluid flow monitoring system comprised of a permanent magnet mounted on a bendable spring blade that provide an output from a Hall effect transducer as the permanent magnet is deflected toward or away from the transducer. The permanent magnet can be mou... | 08/31/1999 |
| 5663508 | Silicon flow sensor A silicon flow sensor is provided having an uncomplicated design and construction, while also exhibiting a desirable level of sensitivity for use in automotive applications. The primary sensing component is preferably formed by a single silicon chip on wh... | 09/02/1997 |
| 5526695 | Pulsed flow meter A movable magnet is captured in and biased toward one end of a passage. A pulse of flow moves this magnet and this movement is sensed by a sensor which sends a signal. A range adjusting channel with a valve therein permits adjustment of the flow which act... | 06/18/1996 |
| 5513526 | Hydrofoil force balance The present invention relates to measuring device for measuring a component f a force acting on a test body, such as a hydrofoil, positioned within a testing apparatus. The measuring device has a test body formed by a foil shaped center section and two adj... | 05/07/1996 |
| 5483840 | System for measuring flow A system for measuring a flow parameter of a fluid, comprising a conduit defining a flow passage for said fluid, said flow passage having a central axis means located in said flow passage for measuring a differential between a first resultant drag exerted... | 01/16/1996 |
