Class 73/707 - With fluid pulsation dampener

Subclass of Class 73 - Measuring and testing
Definition: Subject matter having means to suppress pulsations of the
No. of patents: 39
Last issue date: 11/27/2007

Number	Title	Issue Date
7299700	Methods and apparatus for sensing pressure Methods and apparatus for sensing pressure in a hostile environment are described. In one example embodiment, a microwave radar based sensor is provided. The sensor is coupled to a signal conditioning unit. The signal conditioning unit includes at least one of a pro...	11/27/2007
7260496	Pressure detector and method of diagnosing blockage of impulse lines A pressure detector for detecting a high side pressure from a high pressure side impulse line and a low side pressure from a low pressure side impulse line includes a high side pressure variance calculating section for calculating a high side pressure variance from ...	08/21/2007
7243550	Relative pressure sensor having an atmosphere-side damper A relative pressure sensor comprises two chambers and two separating membranes respectively provided for a process pressure and an ambient pressure. The chambers are separated by a pressure-sensitive element and are filled with a transmission medium. In order to att...	07/17/2007
6681636	Pressure sensing apparatus having pressure pulse dampener An apparatus and method for pressure sensing includes a Bourdon tube connected to a source of fluid pressure for sensing pressure changes therein, the Bourdon tube containing a pressure sensitive medium, a socket having a bore therethrough and positioned ...	01/27/2004
6550336	Probe for measuring pressure oscillations A probe for measuring pressure oscillations includes an inner tube functioning as a measuring tube, an outer tube positioned so as to envelop the measuring tube, a toroidal space open to one side being defined between an outer wall of the measuring tube a...	04/22/2003
6092426	High-pressure sensor A high-pressure sensor specially for monitoring pulsating hydraulic pressure impulses, as for example in injection systems of combustion engines is provided with a pressure space shaped balloon-like before the diaphragm part, enabling optimal measuring si...	07/25/2000
6053048	Pressure-measuring device In a pressure-measuring device (10) for measuring pressure fluctuations in a space (15) which is filled with hot gases at a first temperature (T1) and is delimited by at least one wall (12, 14) from an outer space (28) which is at a lower second temperatu...	04/25/2000
5419182	Pressure difference detector, a method for judging an abnormality of the detector, and a fuel vapor emission preventing employing the detector A pressure difference detector for detecting a pressure difference between atmospheric pressure and a fuel system vapor pressure to be measured, includes a pressure dampening member 17a for dampening the flow of atmospheric air between an introducing inle...	05/30/1995
5367998	Fuel injection system for an engine A fuel injection and control system for a V-type, two cycle, crankcase compression, internal combustion engine. The fuel injection system includes fuel injectors positioned in the valley of the engine and which are supplied with fuel under pressure from a...	11/29/1994
5343754	Pressure transducer A pressure transducer is shown having a pressure responsive movable diaphragm which effectively forms a wall of a pressure chamber; the diaphragm upon sensing fluid pressure thereagainst is effective for accordingly varying an electrical resistance; a pas...	09/06/1994
5284060	Pressure/control gage A pressure/control gage (12) includes a housing (4) defining an elongate, generally funnel shaped fluid chamber (6) having an open end (8) at the base of the fluid chamber. The open end is sealed by a diaphragm (10). The sealed fluid chamber includes a li...	02/08/1994
5235859	Control console for gas die cylinder systems A control console for a gas die cylinder system which includes a plurality of gas die cylinders to which gas under pressure is provided wherein the control console comprises a body including an inlet for gas, a pressure chamber communicating with said inl...	08/17/1993
5234027	Fluid flow inhibitor for use in a static flow system device A flow restricting device is described which includes a conduit with a flow inhibitor therein. A plug stem is placed inside a passage in the inhibitor such that it can slide axially, while the head of the plug, which has a larger cross-sectional area than...	08/10/1993
5231874	Buffer arrangement with back flushing of a quartz pressure transducer in a formation testing device This disclosure sets forth a fluid flow line which extends at one end from a fluid source at a pressure to be measured comprised of fluids contained within a well borehole, and the fluid flow line has a "J" shaped component to trap debris and trash to pre...	08/03/1993
5228334	Pressure transducer A pressure transducer is shown having a pressure responsive movable diaphragm which effectively forms a wall of a pressure chamber; the diaphragm upon sensing fluid pressure thereagainst is effective for accordingly varying an electrical resistance; a pas...	07/20/1993
5185002	Transducer apparatus having water hammer dampening means An improvement to a flow control system is disclosed which comprises a transducer apparatus having dampening means to prevent or reduce the destructive effect of water hammers in such fluid control systems. This is especially useful in surgical irrigation...	02/09/1993
5076280	Device for correcting blood pressure waveform The waveform of a blood pressure of a patient is corrected by a pressure correcting mechanism having an air chamber having a volume ranging from 1 to 150 μl and a resistance passage having one end communicating with the air chamber and the other end with...	12/31/1991
4934903	Oil discharge detecting device for marine engine A lubricating system for an internal combustion engine including a separate lubricating pump that operates with cyclically operating pressure. Detecting means are incorporated for damping the output pressure of the pump and sensing the damped pressure to ...	06/19/1990
4901761	Closure apparatus with pressure test device A drilling fluid saver valve apparatus incorporating a pressure test device. The apparatus includes a tubular body having a valve seat and a closure check valve moveably mounted in spring loaded relation within the body to be normally seated in closed rel...	02/20/1990
4779625	Damping device for circulatory pressure measuring apparatus A damping device for use in conjunction with a circulatory pressure measuring system to attenuate resonant pressure waves therein includes a series connector for connection to the pressure measuring system. An integrally connected parallel portion include...	10/25/1988
4777497	Ink jet printing head having a flexible film covered ink supply chamber An ink jet printing device including a printing head having a nozzle through which ink can be ejected. The head includes an internal chamber ink and ink ejection is caused by internal pressure pulses. The internal chamber is formed in part by a deformable...	10/11/1988
4733563	Fluid pressure transmitter for use in potentially explosive atmospheres A fluid pressure transmitter suitable for use in potentially explosive atmospheres of the type comprising a measuring transducer provided with inductive, capacitive or resistive sensor means, the transducer having at least one measuring chamber in which e...	03/29/1988
4713969	Differential pressure transmission apparatus A differential pressure transmitter has a body wherein a pressure transmission passage filled with a pressure transmission medium is formed. A differential-pressure/displacement converting element is disposed in the body to partition the passage into a hi...	12/22/1987
4674335	Oil pressure sensor A low oil pressure sensor (32) is provided for direct mounting to a lubrication pump (4) for direct sensing of differential pump pressure. An internal sensor body portion (40) is exposed to the internal pump environment and has a magnetically permeable pi...	06/23/1987
4668889	Static overpressure protection system for differential pressure transducer An improved differential pressure transducer is provided having static overpressure protection means. The overpressure protection means includes spring-loaded element being shiftable in response to an overpressure condition....	05/26/1987
4637000	Depth transducer protective assembly A ruggedized depth transducer for measuring ambient hydrostatic pressure adjacent an acoustic source wherein the transducer includes a housing having a depth sensor mounted therein. The housing further includes a bore for placing the depth sensor in fluid...	01/13/1987
4594877	Pneumatic deadweight tester incorporating dampening means A weight carrier rests on a floating ceramic ball supported within a nozzle by flow-regulated air. The air flows in an inlet path within the nozzle to support the ball and then exits through an outlet path downstream of the ball. A pressure regulator main...	06/17/1986
4572204	Pressure dome with compliant chamber A pressure dome in which the wall forming the cavity containing fluid under a pressure that is to be measured has such a low compliance as to prevent expansion or contraction of the base of the dome resulting from changes in its temperature from causing t...	02/25/1986
4517844	Fluid damping device for a compliant system Apparatus for removing undesirable resonance in a closed, tubular fluid flow system permitting more accurate transducer measurement of varying fluid pressure within the system is disclosed. The apparatus includes a compliant air cavity coupled to the syst...	05/21/1985
4507971	Hydraulic filter for eliminating slow pressure fluctuations A hydraulic accumulator unit having a volume variable against the force of a spring and a restrictor are provided for eliminating slow pressure fluctuations in a measuring instrument responsive to fluid pressure, through which restrictor the hydraulic acc...	04/02/1985
4452069	Method of and apparatus for sensing knocking in internal combustion engine A method of sensing a knocking taking place in an internal combustion engine through the sensing of pulsative component of the cooling water pressure or lubricating oil pressure. The sensing of the pulsative component is made by removing the static compon...	06/05/1984
4413524	Pulsation throttling device for a pressure gauge A generally cylindrical plug is adapted for a snug fit in a socket bore communicating with the inlet of a pressure gauge. The plug includes an upstream portion and an axially contiguous downstream portion, each cooperating with the surrounding surface of ...	11/08/1983
4389897	Impeller flow-meter pulsation damping The subject matter of the invention is an impeller flow-meter, particularly for accurate measurement of the flow rate of liquid fuel fed to an internal-combustion engine. In the flow-meter according to the invention, an impeller chamber (1) is provided wi...	06/28/1983
4335729	Apparatus and method for suppressing resonance in an electromanometry system A novel apparatus and method for suppressing unwanted resonance in an electromanometry system. The apparatus includes a compliant air cavity connected through a variable impedance device which is coupled in parallel to the liquid-filled catheter of the el...	06/22/1982
4332172	Device for determining the pore water pressure in a soil A device for measuring pore water pressure in soils employs a pore pressure sound (2) as a sensing member and a closed measuring system (5,6) for creating the least possible disturbance in soils having a low degree of permeability, such as clay. The close...	06/01/1982
4299253	Pulsation dampener A pulsation dampener providing high attenuation in a narrow quiet band or frequency. The pulsation dampener is tuned to provide a reflected wave 180° out of phase in the narrow band to cancel the undesired pulsation. A silicone polymer contained by a dia...	11/10/1981
4166396	Pressure indicating device A pressure indicating device according to the present invention includes a diaphragm assembly engaging one extremity of an indicator actuating means whereby flexing of the diaphragm caused by fluid pressure or other force will induce movement of the indic...	09/04/1979
4137781	Device for measuring the static pressure of a moving fluid A directional device operating similar to a wind vane has a hollow vertical shaft which is journalled in a housing containing three chambers in communication. An air inlet port is located on the side of the directional vane and communicates through the ho...	02/06/1979
4028940	Level sensor A sensor apparatus for determining fluid levels and pressures in a fluid-containing vessel wherein the sensor apparatus comprises a mounting member having a fluid passageway positioned therein; a pressure sensor in operative contact with one end of the mo...	06/14/1977

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Class 73/707 - With fluid pulsation dampener