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| Number | Title | Issue Date |
| 7389684 | Gas lift flow surveillance device The gas lift flow surveillance device has a paddle having a rod with a target attached to one end and a paddle block attached to the opposite end. The paddle block is pivotally disposed within a surveillance device housing body. A contact extending from the paddle b... | 06/24/2008 |
| 6976393 | Pygmy current meter with magnetic switch An apparatus for measuring fluid velocity includes a generally Y-shaped yoke including a base and first and second forks, the first and second forks including through holes at ends thereof; a bucket wheel supported between the first and second forks of the yoke; a f... | 12/20/2005 |
| 6889564 | Peak flow meter A peak flow meter for measuring a peak flow or air exhaled by a patient. The preferred peak flow meter includes a substantially hollow housing having a top portion, a bottom portion, an air inlet and at two air outlets. A flow restriction is disposed within the hous... | 05/10/2005 |
| 6422162 | Method and apparatus for flow control of NH3 The present invention provides an apparatus and method for accurately controlling the amount of NH3 to be applied to a field by measuring the NH3 flow rate without condensing or cooling the NH3. The system includes a contr... | 07/23/2002 |
| 5939688 | Fluid responsive switch pivot arm seal A fluid responsive switch having a pivot arm for monitoring fluid flowing in a conduit or the level of liquid in a container with an improved resilient seal. The pivot arm, in the fluid responsive switch, is mounted in a housing by a pivot pin and a resil... | 08/17/1999 |
| 5816246 | Electronic pocket spirometer This invention relates generally to instrumentation for pulmonary monitoring and diagnosis and particularly to a compact, hand held, battery powered spirometer, measuring and monitoring expiratory and inspiratory flow rates, volumes and other lung functio... | 10/06/1998 |
| 5613497 | Miniature peak flow meter Miniature peak flow meter is compact, portable diagnostic device of beeper size. It consists of two bodies which create a curved cylinder inside which moves a rotational piston by means of rotation. The resistance to that movement is achieved by a special... | 03/25/1997 |
| 5588462 | Valve and sensor arrangement A valve and sensor arrangement includes a valve which has a valve member. A sensor such as a sensor for detecting a flow of water through the valve is provided within the valve member and is preferably perpendicular to a turning axis of the valve member. ... | 12/31/1996 |
| 5565630 | Peak flow meter An improved peak flow meter for measuring the peak flow of exhaled air including an indicator and one or a plurality of vents designed so that the indicator provides a logarithmic measurement of the exhaled air. Also provided is a peak flow meter adaptabl... | 10/15/1996 |
| 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 |
| 5413112 | Expiratory flow measuring device A device for measuring the maximum flow rate of a single forced expiration, comprises an elongated hollow body with inlet and outlet ends, a vane mounted to a shaft and rotatable within the body from a defined rest position, and an indicator to indicate m... | 05/09/1995 |
| 5351557 | Rotary flowmeter with varying area channel A rotary type of flowmeter having an orifice directing the flow toward a moveable needle. The needle moves within a channel that has a varying cross-sectional area in a plane transverse to the needle movement such that the effect of the velocity of the fl... | 10/04/1994 |
| 5349334 | Wind velocity signalling apparatus A new and improved wind velocity signalling apparatus includes a first wind velocity sensing and signalling assembly which is connected to a support structure (such as a gabled roof) and which senses and signals the occurrence of wind of a predetermined v... | 09/20/1994 |
| 5277195 | Portable spirometer A portable hand-held spirometer capable of being accommodated in a pocket or handbag, comprising a chassis, an enclosed curved passageway in communication with the chassis including an inlet, for receiving the forced expiration of the user, and an outlet,... | 01/11/1994 |
| 5253536 | Rotary flowmeter with variable inlet A rotary type flowmeter having a variable orifice through which the flow to be measured is directed toward a rotatable needle. A preload is also applied and which may be varied as desired. By the use of the variable orifice and with the preload, the same ... | 10/19/1993 |
| 5183983 | Flow switch assembly for fluid flow monitoring A basic housing for a fluid flow monitoring assembly comprising a sensing leakproof elongate hollow body formed from a non-magnetic, metallic material and pivotally mounting internally of same a vane assembly that at one end includes a vane adapted to be ... | 02/02/1993 |
| 4955785 | Fan structure with flow responsive switch mechanism The problem of providing a simple, small, lightweight and reliable flow responsive switch mechanism (32) in a fan structure, such as for aerospace applications, is solved by providing a housing (12) defining a fan involute (22). An impeller (18, 20) is mo... | 09/11/1990 |
| 4875377 | Flowmeters A flowmeter utilizing the property of dry saturated steam that the density of the steam is dependent upon the temperature thereof has a first sensor that is a rotation sensor (1) which includes a flap (14) which is disposed in a steam flow passage (12) to... | 10/24/1989 |
| 4746775 | Fluid flow switch assembly There is disclosed a fluid flow switch assembly comprised of a conduit member having an area of predetermined cross-section and a port portion and further including a plate member mounted for rotation in the conduit member and disposed over the area of pr... | 05/24/1988 |
| 4725700 | Airflow switch for air ducts An airflow switch for sensing airflow or lack of same in an air duct comprising a housing base, mounting in side-by-side relation an adjustable range spring and a single-pole double-throw snap action microswitch, with the microswitch having its actuating ... | 02/16/1988 |
| 4713972 | Pocket air velocity gauge In a pocket air velocity gauge, in order to expand the controlled, flow-dependent pointer deflection and the measuring scale to an angular range of at least 270°, the air flows through an inlet opening (22) on the back of a housing into a ring channel (1... | 12/22/1987 |
| 4665757 | Flow rate meter with pressure equalizer conduit A flow rate meter which serves to ascertain the mass of a flowing medium, in particular the flow rate of the air aspirated by an internal combustion engine via its air intake tube. The flow rate meter includes a measuring device that is pivotable about a ... | 05/19/1987 |
| 4638812 | Exhalation flow meter The present invention concerns a device for measuring the peak flow of a person's exhalation. The device comprises a frame structure which is provided with a mouth piece. Inside the frame structure, a flap is disposed, along with a pointer. A spring of th... | 01/27/1987 |
| 4630487 | Flow rate meter A flow rate meter which serves to measure a quantity of air aspirated by an internal combustion engine via an air intake tube. The flow rate meter includes a housing, in which a flow conduit having a measuring body is disposed, the measuring body being pi... | 12/23/1986 |
| 4620448 | Arrangement for measuring the rate of flow of a gaseous or liquid medium through a housing A measuring device that is moved corresponding to the amount of medium flowing through a housing is provided for measuring the flow rate of a gaseous or liquid medium through the housing. The displacement of the measuring device represents a measurement o... | 11/04/1986 |
| 4554825 | Damping device of an air flow rate meter disposed in the air intake tube of an internal combustion engine A damping device of an air flow rate meter disposed in the intake tube of an internal combustion engine, which air flow rate meter serves to damp the effect of intake-tube recoiling upon the air flow rate meter. The damping device includes a guide bushing... | 11/26/1985 |
| 4548076 | Air flow volume measuring apparatus An improved selector provides for air paths between a meter and an air volume sensing manifold that are similar for both up and down flow of air through the apparatus thereof. This provides similar momentum losses in the air reaching the meter for both ai... | 10/22/1985 |
| 4530334 | Air flow metering A single point fuel injection air/fuel metering device comprises a tubular housing with a flap pivotally mounted therein upstream of a throttle valve. The flap is dynamically balanced about its pivot axis, which is offset from the axis of the tubular hous... | 07/23/1985 |
| 4495823 | Bidirectional flow meter A bidirectional fluid flow indicator comprising a housing having a fluid inlet and fluid outlet, first and second separated fluid passageways intermediate said inlet and said outlet, a vane pivotally secured across one of said first channel, a second vane... | 01/29/1985 |
| 4454757 | Wind speed and direction measuring instrument A portable, pocket sized instrument for measuring wind speed and indicating wind direction wherein a multiple number of vanes of varying size and spacing are radially and orthogonally fixed to a disc and wherein the force of the wind against the vanes cau... | 06/19/1984 |
| 4454768 | Fluid flow controller A pivotal shaft is connected to an actuator with the actuator being pivotally mounted with one end extending into a conduit and the other end being pivotally connected to the shaft. Actuation of the actuator through fluid flow causes the shaft to pivot an... | 06/19/1984 |
| 4420957 | Monitor method and apparatus for particle blasting equipment An improved particle blasting apparatus for continuously monitoring media flow, nozzle wear, and nozzle blockage. The apparatus includes a source of compressed air, a nozzle, structure for conveying the compressed air from the source to the nozzle in an a... | 12/20/1983 |
| 4407156 | Air flow rate measuring device in an internal combustion engine An air flow rate measuring device is proposed for an internal combustion engine. The air flow rate measuring device includes a baffle valve disposed in the air intake tube and a signal generating circuit coupled therewith. A damping member is associated w... | 10/04/1983 |
| 4393723 | Fluid flow meter A fluid flow meter with a turbine rotationally supported within a transparent cylindrical housing and biased against its rotational response to the flow of fluid whereby flow rates are read on a circumferential scale mounted on the turbine. In an alternat... | 07/19/1983 |
| 4392386 | Flow rate meter A flow rate meter is proposed which serves to ascertain the quantity of a flowing medium, in particular the quantity of air aspirated via an air intake tube by an internal combustion engine. The flow rate meter includes a measuring body which is pivotable... | 07/12/1983 |
| 4366719 | Instrument for measuring the flow rate of a fluid in motion A flow-rate meter has a cylindrical housing in which a counterweighted blade is pivotable on a shaft about the axis of the housing which is subdivided by a radial partition, an inlet port and an outlet port opening axially into this housing on opposite si... | 01/04/1983 |
| 4346589 | Flow rate meter A flow rate meter is proposed which serves to ascertain the quantity of a flowing medium particularly the quantity of air aspirated by an internal combustion engine via an air intake tube. The flow rate meter includes a measuring device pivotable in a flo... | 08/31/1982 |
| 4344331 | Fluid flow meter A fluid flow meter comprised of a body portion having a passage therein for the fluid to flow therethrough, a movable member provided in the passage and adapted to be tiltable to open or close throttling of the passage corresponding to the flow rate of th... | 08/17/1982 |
| 4220038 | Apparatus for monitoring instrument readings of transient force of a moving fluid column A device for verifying instrument readings of transient force of a moving fluid column including a paddle depending from a taut wire torsion bar. The unit is adaptable to instruments utilizing fluid pulses in testing objects for resistance or vulnerabilit... | 09/02/1980 |
| 4111045 | Air flow meter A flow meter for metering the air quantity aspirated by an internal combustion engine including a metering valve element constructed as a box-like cylindrical segment pivotably mounted in a flow tube of the engine. The valve element has a radial transvers... | 09/05/1978 |
