Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7367241 | Differential pressure type flowmeter and differential pressure type flow controller A differential pressure type flowmeter comprises an orifice, a detector to detect a fluid pressure P1 on the upstream side of an orifice, a detector to detect a fluid pressure P2 on the downstream side of an orifice, a detector to detect a flui... | 05/06/2008 |
| 7130750 | Flow meter with magnetoresistive sensors and method of measuring flow A variable area flow meter has a magnet carried by a piston which is moved to a position representing fluid flow. An array of magnetoresistive bridge sensors adjacent the path of magnet movement senses the magnet position. The bridges are unbalanced by the magnet fi... | 10/31/2006 |
| 7117595 | Method for manufacturing a conveying element of an axial type flow meter used for drink vendors A device is described for measuring a fluid, to be used advantageously in mixing devices for ingredients of liquid drinks. The device comprises an impeller, a diffuser upstream from the impeller and detecting means for the impeller (46). The diffuser (41 | 10/10/2006 |
| 7089805 | Average bidirectional flow tube An average bidirectional flow tube, including a body having two side plates and upper and lower plates, a partition plate installed to be perpendicular to the side plates of the body so that front and rear ends of the tube are separated from each other, and two pair... | 08/15/2006 |
| 7006896 | Sealant dispensing correction method As the command signal to a unit for dispensing sealant is modified, the pressure range for the calibrated point is either extrapolated or interpolated as necessary in order to achieve the correct flow rate. As a result, each time the unit dispenses, it is also recal... | 02/28/2006 |
| 6725731 | Bi-directional differential pressure flow sensor Disclosed is a bi-directional differential pressure flow sensor that is configured to establish a direction and flow rate of a fluid flow. The flow sensor includes a flow restriction member, a differential pressure sensor, and processing electronics. The flow restri... | 04/27/2004 |
| 6668665 | Gas level monitoring system and gas flow rate sensor used therein An in-line gas flow rate sensor includes a movable flow orifice and a fixed flow restrictor adjacent the flow orifice for changing the gas flow through the flow orifice. The flow orifice and the flow restrictor are formed so that each uniform increment of... | 12/30/2003 |
| 6539315 | Regulator flow measurement apparatus Apparatus for determining fluid flow through a pressure regulator is disclosed. The pressure regulator is disposed in a fluid flow passage and has a throttling element moveable in the flow passage. A stem is attached to the throttling element. The apparat... | 03/25/2003 |
| 6443014 | Proportioner In a proportioner for proportioning a fluid flow ($c;) from an input side of a first proportioning element (10) to an output side of a second proportioning element (10), the first and second proportioning elements comprise a membrane (12) provided with... | 09/03/2002 |
| 6279405 | Apparatus and method for a pressure monitoring device A differential pressure monitoring device utilizing two crystalline frequency sensors exposed to different pressures for generating two signals which are combined by a frequency mixer. Two offset based frequency crystal sensors are each exposed to differe... | 08/28/2001 |
| 6253605 | Semiconductive flow proportioner A proportioning element (10) for proportioning a fluid flow from an input side to an output side of the proportioning element (10) comprises a membrane (12) provided with at least one opening (16) acting as a flow resistor for a medium to be proportioned.... | 07/03/2001 |
| 6247495 | Flow rate detection mechanism with a restriction element for mass flow meters A flow proportioning assembly for dividing a portion of a fluid flow such as gas for presentation to a sensor includes a holder member having a central opening and forming an exterior peripheral passageway when inserted within a conduit of a flow meter ho... | 06/19/2001 |
| 6216727 | Water flow sensing device A water flow-sensing device includes an assembly with a stationary metering rod with a cylindrical portion and a conical portion and a relatively moveable element in the shape of a hollow cylindrical toroid. The relatively moveable element is biased by a ... | 04/17/2001 |
| 5924446 | Control apparatus for liquid medium A control apparatus for a liquid medium including a body portion provided with flow channels. The body portion includes an inlet for the medium, an outlet for the medium to an apparatus that the medium is conducted to, a return point for the medium return... | 07/20/1999 |
| 5820715 | Method of making flow monitoring line strainer having flow indicating element A line strainer for screening fluid flow in a small diameter conduit is constructed with an integral housing of clear or transparent thermoplastic polymer. A fluid flow channel through the housing center is terminated at opposite ends by sonically welded ... | 10/13/1998 |
| 5717137 | Flow monitoring line strainer A line strainer for screening fluid flow in a small diameter conduit is constructed with an integral housing of clear or transparent thermoplastic polymer. A fluid flow channel through the housing center is terminated at opposite ends by sonically welded ... | 02/10/1998 |
| 5698793 | Flow meters A flow meter comprises a divergent nozzle region 6 and a plug 10 which is axially displaceable within the nozzle region 6 under the influence of a flowing fluid. The plug 10 is guided, during displacement, by vanes 38 extending inwardly from the wall of t... | 12/16/1997 |
| 5554805 | Flowmeter with a variable constriction A flowmeter with a main conduit having a constriction formed therein through which a main flow passes, and a by-pass conduit which is in fluid connection with the main conduit upstream and downstream of the constriction and in which a by-pass flow passes ... | 09/10/1996 |
| 5544533 | Area flow meter with hall devices having magnetism-responsive surfaces In an area flow meter, float 22 made of material larger in specific gravity than a fluid being measured is movably disposed in vertical pipe 21. Magnet 23 in the float 22 has its north and south poles aligned vertically to produce magnetic-force lines 26 ... | 08/13/1996 |
| 5458007 | Bi-directional flow indicator Disclosed is a flow indicator including a tubular body containing a rod and a magnetized orifice member moving along the rod. The rod has a central ridge of greatest cross-sectional area, tapers toward either end and has a rate of taper which increases to... | 10/17/1995 |
| 5419203 | Flow meter having a contoured plug and resilient means A target meter comprises a plug 12 which is movable relatively to an orifice plate 8 against a spring 20. The spring transfers the force on the plug 12 to an abutment 26, 42. The force applied to the support 26, 42 is detected by strain gauges 30, 44 and ... | 05/30/1995 |
| 5404758 | Flowmeter for determining flowing mediums A flowmeter for determining the amount of flowing medium using an orifice (4) and a resistor body (5) in a cavity (6) through which the medium to be measured flows. Not the resistor body (5) but an orifice sleeve (4) is displaced as a consequence of the v... | 04/11/1995 |
| 5343763 | Flow indicator impeller module A fluid flow indicator module 50 for insertion into a transparent conduit 12, the conduit 12 defining a path of a fluid. The fluid flow indicator module 50 has a transparent housing 52 having a fluid inlet 66 and a fluid outlet 75, the housing 52 being in... | 09/06/1994 |
| 5327789 | Electromagnetic detection system for variable area flowmeter A variable area flowmeter employing a vertical tube containing a displaceable magnet and a closed-loop magnetic detection circuit. The closed-loop magnetic detection circuit includes first and second magnetic cores each having a sense coil and a compensat... | 07/12/1994 |
| 5245640 | Nuclear fuel rod end plug pressurization hole inspection apparatus To inspect the integrity of pressurization holes in nuclear fuel rod final end plugs, quality assurance apparatus includes an adapter providing a test chamber into which an end plug is inserted. Instrument gas is introduced into the test chamber through a... | 09/14/1993 |
| 5174161 | Wireline and coiled tubing retrievable choke for downhole flow measurement A method for more accurately measuring small changes in flowrate, and measuring low flowrates, of a well fluid in a pipe, adapted to be disposed in a borehole, includes inserting a choke in a constricted section of the pipe and placing a differential pres... | 12/29/1992 |
| 5086654 | Variable area flowmeter A variable area flowmeter (10) for monitoring the rate of flow of a cooling and lubricating medium about a pump seal, having a transparent flow tube (27) through which the flow passes. An adjustable metering member (38) is mounted within the flow tube (27... | 02/11/1992 |
| 5024105 | Viscosity-insensitive variable-area flowmeter The differential-pressure-sensing and variable-area-occluding functions of a variable-area flowmeter, or rotameter, are performed by separate, but mechanically connected, means. A housing defines a channel for flowing fluid from an upstream to a downstrea... | 06/18/1991 |
| 4986133 | Flow meter The improved flow meter has a generally cylindrical first tube with a rod assembly received in the tube and centrally supported therein. The rod portion of the rod assembly is tapered at a generally uniform rate over at least a portion of its length. An o... | 01/22/1991 |
| 4945771 | Integrated flow meter and vacuum gauge and use A combination air flow and vacuum meter comprising a rigid transparent tubular housing having an inlet end, an opposite outlet end adapted for insertion into a central vacuum inlet or the like, a compression spring-mounted piston riding along an air flow ... | 08/07/1990 |
| 4944190 | Flow meter A fluid flow meter is disclosed which can generate both an electrical and a mechanical representation of flow rate. A first magnet, mounted within a flow tube, is displaced in response to fluid flow in the flow tube. A second magnet, mounted outside the f... | 07/31/1990 |
| 4864871 | Transducer for fluid flow A flow transducer with a variable orifice formed between a conical valve member tapering in the downstream direction and a sliding piston located downstream of the valve member. A throat member is fixed within a housing upstream of the valve member. An an... | 09/12/1989 |
| 4854178 | Flowmeter for dangerous fluids A flowmeter for dangerous fluids, using the deformation of a flexible metic diaphragm under the effect of a pressure variation caused by the liquid flow, the flowmeter being placed under a protective plate and comprising a body of general cylindrical sha... | 08/08/1989 |
| 4840072 | Variable orifice flow meter A variable orifice liquid flow meter comprises a body, a bore in the boby defining a flow tube for liquid, a sharp edged orifice in the bore, a piston having a head capable of blocking the orifice and a stem by which the piston is supported for axial move... | 06/20/1989 |
| 4811607 | Flow sensor A flow sensor comprises a body (4) formed with a through bore (5), at least one fluid inlet (6, 7) and one fluid outlet (7,6) for permitting ingress and egress of fluid to and from the sensor, and a spool (8) slidably mounted within the bore and having at... | 03/14/1989 |
| 4706504 | Flow indicating device and method A device for indicating changes of a fluid flow, comprises a housing (1) and a support member (7), connected with the housing. A valve member (11) is slidable on the support member (7) and is adapted to increase or decrease the through-flow area of a pass... | 11/17/1987 |
| 4643213 | Method and apparatus for controlling leaks in pressurized fluid systems Method and apparatus for controlling fluid leakage from sections of a pressurized fluid system adapted to provide fluid at line pressure to equipment associated therewith includes means for sensing first and second conditions indicative of non-use and of ... | 02/17/1987 |
| 4576036 | Method and apparatus for determining quality and mass flow rate of flowing steam A method based on an orifice flow equation is provided for determining both the quality and the mass flow rate of steam flowing in a line, such as to an injection well in steam flooding operations for recovery of petroleum. A sample of the steam is drawn ... | 03/18/1986 |
| 4572004 | Fluid flow meter for measuring the rate of fluid flow in a conduit A tube fluid flow rate meter comprising reservoir (10) divided by flexible diaphragm (24) into two separate, isolated compartments (12 and 14) except for orifice (25) in diaphragm (24). Incoming tube (42) opens into compartment (14) and outgoing tube (44)... | 02/25/1986 |
| 4562863 | Liquid flow indicator for farm implements A flow indicator that can visually indicate to an implement operator whether or not there is an equal flow rate of liquids through multiple liquid outlet lines on the implement. The flow indicator includes wall portions defining a manifold adapted to be c... | 01/07/1986 |
