With Structure Of Float, Float Tube, Or Float Guide Patents (Class 73/861.57)
  • Patent number: 10488232
    Abstract: A rotameter includes a rotameter body including an inlet, an outlet, and a flow channel that provides fluid communication between the inlet and the outlet. A valve for controlling fluid flow through the inlet includes an actuator rotatable about a first axis. The actuator includes worm gear threads. The valve also includes a valve drive element rotatable about a second axis that extends transverse to the first axis. The valve drive element includes worm gear teeth that mate with the worm gear threads on the actuator so that rotation of the actuator about the first axis imparts rotation of the valve drive element about the second axis. The valve drive element further includes first screw threads that rotate with the valve drive element about the second axis. The first screw threads are configured and arranged to mate with and engage second screw threads to cause linear movement of a valve component along the second axis in response to rotation of the valve drive element.
    Type: Grant
    Filed: January 5, 2016
    Date of Patent: November 26, 2019
    Assignee: DWYER INSTRUMENTS, INC.
    Inventors: Robert Austin Moss, Marcus A. Thoreson
  • Patent number: 10359126
    Abstract: A flow control valve assembly has at least one manifold having an inlet flow port, an outlet flow port, and a flow channel provided there between, the flow channel having an inlet chamber, a variable area chamber and an outlet chamber, with fluid flowing from the inlet flow port to the inlet chamber, the variable area chamber and the outlet chamber, in that order, before exiting the outlet flow port. The flow control valve assembly further includes a float assembly having a fitting, a float extending through the flow channel from the fitting and which is limited for its movement inside the variable area chamber, a measuring device that measures the displacement of the float and which is secured to the fitting and positioned outside the flow channel, and a connecting rod which connects the float to the measuring device and extends through the flow channel.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: July 23, 2019
    Assignee: Fluid Power Control Systems Inc.
    Inventor: Harsoyo Lukito
  • Patent number: 10067026
    Abstract: A method and apparatus can include: shutting off a gas line at a stop valve; disconnecting a utility meter from a house line; connecting the house line to an output end of a flow meter; connecting the utility meter to an input end of the flow meter; turning the gas line on at the stop valve; and determining: the gas line is leak free based on the flow meter showing no gas flow, and the gas line is leaking based on the flow meter showing a steady gas flow.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: September 4, 2018
    Inventors: John Albert Ritter, Joe Trinh, Anthony Alan Grunauer
  • Patent number: 9733111
    Abstract: A flow control valve assembly has at least one manifold having an inlet flow port, an outlet flow port, and a flow channel provided therebetween, the flow channel having an inlet chamber, a variable area chamber and an outlet chamber, with fluid flowing from the inlet flow port to the inlet chamber, the variable area chamber and the outlet chamber, in that order, before exiting the outlet flow port. The flow control valve assembly also includes a float assembly extending inside the flow channel, the float assembly having a float that is limited for its movement inside the variable area chamber, a measuring device which measures the displacement of the float, and a connecting rod which connects the float to the measuring device. A bracket assembly is secured to the inlet chamber inside the flow channel, with the measuring device retained by the bracket assembly.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: August 15, 2017
    Assignee: Fluid Power Control Systems, Inc
    Inventor: Harsoyo Lukito
  • Patent number: 9341222
    Abstract: A parking brake has the function of monitoring a malfunction of the parking brake, thereby preventing accidents. The parking brake includes an electric motor and a linear motion mechanism which are connected together through a speed reduction mechanism. The parking brake further includes a locking pin which can be brought into engagement with the speed reduction mechanism by a solenoid. The parking brake further includes a monitor for detecting a change in reactance of the solenoid. Since the change in reactance as detected corresponds to a displacement of a plunger, it is possible to prevent accidents by monitoring deteriorated sliding properties of the locking pin based on the displacement detected.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: May 17, 2016
    Assignee: NTN CORPORATION
    Inventors: Yui Masuda, Makoto Muramatsu
  • Patent number: 8256304
    Abstract: A flow meter having a magnetic base sensor for electrical feedback of flow rate is disclosed. A float rod carrying an indicator and a magnet moves within the flow meter body with and the flow being visually read and electronically read.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: September 4, 2012
    Assignee: Waukee Engineering Company, Inc.
    Inventor: Kevin P. Therrian
  • Patent number: 8132470
    Abstract: A fluid flow detector includes a detector main body defining a fluid flow channel having a fluid flow detection channel positioned adjacent an upstream hole and a discharge channel positioned adjacent a downstream hole. A mobile body is positioned within the fluid flow channel and dimensioned to be movable along the fluid flow channel. The diameter of the fluid flow detection channel is smaller than the diameter of the discharge channel, and the maximum diameter of the outer peripheral edge part of the face of the fluid flow channel orthogonal to the direction of movement of the mobile body is slightly smaller than the diameter of the fluid flow detection channel. The upstream hole and the downstream hole are formed with a size and shape such that fluid can flow through the upstream and downstream holes without being obstructed by the mobile body.
    Type: Grant
    Filed: January 22, 2010
    Date of Patent: March 13, 2012
    Assignee: Tyco Healthcare Group LP
    Inventors: Kazuhiro Koike, Nobuaki Suzuki, Motonori Watanabe, Masatoshi Yokoyama, Yoshimi Akaike
  • Patent number: 8061218
    Abstract: An upstream hole is formed at the upstream end of a detector main body of a liquid flow detector for detecting liquid flow, and a downstream hole is formed at the downstream end, with a liquid flow channel comprising a liquid flow detection channel, discharge channel, and, optionally, intermediate flow channel, being formed between the upstream hole and downstream hole. A mobile body which is optionally, spherical, moves with the flow of liquid, and is arranged inside the liquid flow channel. The diameter of the liquid flow detection channel is smaller than the diameter of the discharge channel, and the diameter of the mobile body is slightly smaller than the diameter of the liquid flow detection channel. The shape of the peripheral edge part of the upstream hole and the downstream hole is optionally elliptical.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: November 22, 2011
    Assignee: Tyco Healthcare Group LP
    Inventor: Kazuhiro Koike
  • Publication number: 20110265579
    Abstract: A flow meter having a magnetic base sensor for electrical feedback of flow rate is disclosed. A float rod carrying an indicator and a magnet moves within the flow meter body with and the flow being visually read and electronically read.
    Type: Application
    Filed: April 30, 2010
    Publication date: November 3, 2011
    Inventor: Kevin P. Therrian
  • Publication number: 20110088485
    Abstract: An improved fluid flow gauging device includes a light enhanced acrylic block flow tube to optimize visualization of pressure readings. An LED or other light source is fitted to the top of the flow tube and illuminates a float or bobbin from above to provide more accurate readings, especially in low light conditions such as modern operating rooms. In addition, the light enhanced flow tube provides a mechanical backup in the case of failure of newer electronic systems and visually matches the graphical flow display, simultaneously providing a double-check of the electronic system.
    Type: Application
    Filed: May 7, 2010
    Publication date: April 21, 2011
    Inventors: Erik J. Bluemner, George P. Kosmopoulos
  • Patent number: 7782461
    Abstract: A flow metering device and method for monitoring flow of a liquid, has a body with an inlet port and an outlet port. A flow chamber is formed therein between a pair of laterally placed windows in the flow chamber. A light emitting source placed in one of the windows and a light receiver placed in a second of the windows. The flow chamber has a flow restricting and light stopping element held therein and movable between a rest position and an operating position.
    Type: Grant
    Filed: April 5, 2007
    Date of Patent: August 24, 2010
    Inventors: Sean J. Massey, Robert P. Baeyens, Donald K. Henderson, Robert D. Moss
  • Patent number: 7739921
    Abstract: A flow measurement system uses conduits adapted to be coupled to and throughout a liquid or gaseous fluid flow distribution system. Each conduit is instrumented to measure parameters associated with the liquid or gaseous fluid moving therethrough, and wireless transmit a unique code and data indicative of the parameters so-measured. A remotely-located receiver and output device(s) may be used to provide the data and unique code associated with each of the conduits in a human-discernable format. Each conduit may also receive data resulting in adjustment of fluid flow through the conduit.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: June 22, 2010
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Wade Babcock
  • Patent number: 7658081
    Abstract: The compressor has a differential pressure type flow rate detector that obtains the pressure in an upstream passage and the pressure in a downstream passage to detect a refrigerant flow rate within a refrigerant passage. The detector has an accommodation chamber, and a partition body slidably accommodated within the accommodation chamber. The partition body comparts the accommodation chamber into a high pressure chamber to which the pressure in the upstream passage is introduced, and a low pressure chamber to which the pressure in the downstream passage is introduced. The compressor has an oil separator having an oil introduction passage connected to the oil separating chamber and a high pressure introduction passage introducing the pressure in the upstream passage to the high pressure chamber. The oil introduction passage introduces the oil separated from the refrigerant by the oil separator to a pressure zone other than a discharge pressure zone.
    Type: Grant
    Filed: October 26, 2007
    Date of Patent: February 9, 2010
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Akinobu Kanai, Hiroyuki Nakaima, Yoshinori Inoue, Atsuhiro Suzuki
  • Patent number: 7493829
    Abstract: A flow meter for a variable displacement compressor comprises a movable body operable to move by differential pressure, a magnet provided in the movable body, a magnetic sensor for detecting change of magnetic flux density of the magnet, a flow passage for refrigerant gas which is discharged from cylinder bores to flow therethrough, a sealed chamber connected perpendicularly to the flow passage and accommodating therein the movable body, an urging member for urging the movable body into the flow passage, a clearance formed between a movable body and an inner wall surface of the flow passage, a by-pass passage opened and closed as the movable body is moved in an axial direction of the movable body, and a communication passage for introducing into the sealed chamber the refrigerant gas in a downstream flow passage of the flow passage which is located downstream of the movable body.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: February 24, 2009
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Yoshinori Inoue, Akinobu Kanai
  • Patent number: 7360454
    Abstract: A flowmeter can measure a small flow rate of fluid with high measurement precision, can be made small-sized, can deal with a variety of types of chemicals, and can be produced easily at a low cost. The flowmeter includes: a casing having an enlarged portion and being disposed vertically; and a float enclosed in the enlarged portion of the casing and at least partly having a detection surface. The float is to be pushed up by a fluid flowing from below into the casing and flowing upwardly in the casing. The flowmeter also includes at least one displacement sensor, disposed outside the enlarged portion of the casing, for detecting an axial displacement of the float by magnetizing the detection surface of the float.
    Type: Grant
    Filed: May 5, 2006
    Date of Patent: April 22, 2008
    Assignee: Ebara Corporation
    Inventors: Hiroyasu Kawashima, Hiroaki Ogamino, Katsuaki Usui, Toshiharu Nakazawa
  • Patent number: 7293471
    Abstract: The present invention is directed to a flow meter that obtains the individual flow rates of gas, liquid hydrocarbons, and water in a predominantly gas-containing flowing fluid mixture. The flow meter comprises a water content meter (7) that provides a signal representing a measure of the water content of said fluid. The flow meter also comprises a double differential pressure generating (3) and measuring (4) structure, denoted a DDP-unit (2), that provides two measurement signals (6A and 6B) representing two independent values of differential pressure (DP) in said fluid (1). In addition to the above, the meter also comprises a signal processing unit (8) having inputs (9A-C) for receiving the measurement signals and the water content signal, and a calculation module (10) which calculates values representing the volumetric flow rates of said gas, liquid hydrocarbons and water in said fluid.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: November 13, 2007
    Assignee: Roxar Flow Measurement AS
    Inventors: Øystein Lund Bø, Ebbe Gustaf Nyfors, Rune Sørhus
  • Publication number: 20070227266
    Abstract: A flow meter for a variable displacement compressor comprises a movable body operable to move by differential pressure, a magnet provided in the movable body, a magnetic sensor for detecting change of magnetic flux density of the magnet, a flow passage for refrigerant gas which is discharged from cylinder bores to flow therethrough, a sealed chamber connected perpendicularly to the flow passage and accommodating therein the movable body, an urging member for urging the movable body into the flow passage, a clearance formed between a movable body and an inner wall surface of the flow passage, a by-pass passage opened and closed as the movable body is moved in an axial direction of the movable body, and a communication passage for introducing into the sealed chamber the refrigerant gas in a downstream flow passage of the flow passage which is located downstream of the movable body.
    Type: Application
    Filed: March 23, 2007
    Publication date: October 4, 2007
    Inventors: Yoshinori INOUE, Akinobu KANAI
  • Publication number: 20070199388
    Abstract: A floating body flowmeter having a measuring tube (1) which is positioned vertically and through which a substance (2) to be measured flows, in which tube a floating body (3) is arranged in order to determine the flow rate, the rise height (h) of said body relative to the measuring tube (1) being in a defined relationship with the flow rate, it being possible for the measuring range to be adjusted at least via the density of the floating body (3), and the floating body (3) being heterogeneous in such a way that the latter consists of an industrial mass-produced material in the core (4), the material selection being coordinated with the fact that the measuring range can be adjusted substantially via the density of the core (4), and the core (4) is provided with an external coating (5), its material being coordinated with the fact that this is chemically and/or mechanically resistant to the substance to be measured, and furthermore that all the other parts in contact with the substance to be measured are coated
    Type: Application
    Filed: February 21, 2007
    Publication date: August 30, 2007
    Applicant: ABB Patent GmbH
    Inventors: Wilfried Furkert, Dieter Keese
  • Patent number: 7140262
    Abstract: We have invented an improved apparatus for electronically measuring fluid flow. The apparatus includes a radiation detection means for indicating the position of a flow indicator in a chamber of a variable area flowmeter and has a reliability, versatility and functional accuracy not obtainable with known variable area flowmeters. The invention may also include a variable area flowmeter with the flow indicator in a tapered fluid flow chamber with a wall and a long axis, the chamber having a front side, a back side, and an operational length substantially parallel to the long axis. The invention has no moving parts and is not intrusive so mechanical malfunction and unwanted leaks can not occur. Useful embodiments include, for example, compact self contained apparatus useful for fitting around existing flowmeters, systems that include flowmeters and systems able to work with some fluids that are visually opaque.
    Type: Grant
    Filed: May 5, 2005
    Date of Patent: November 28, 2006
    Assignee: Vaughn Neher Technology, LLC
    Inventors: Toni Cline Vaughn, legal representative, Norman T. Neher, Timothy B. Vaughn, deceased
  • Patent number: 6988419
    Abstract: A flowmeter includes a floating body which floats freely in a stream in a measuring tube, and is acted upon by a flowing force, buoyancy and a weight. In order to generate a counterforce, a measuring spring is fixedly connected to the floating body. The floating body is preferably self-stabilized through a selection of corresponding geometrical relationships. The measuring spring can optionally be rotatably supported on the floating body and/or the measuring tube. The floating body is suitably made of light weight plastic material, so that the density (mass/volume) of the floating body matches the density of the flowing medium.
    Type: Grant
    Filed: November 19, 2002
    Date of Patent: January 24, 2006
    Assignee: GEMÜ Gebrüder Müller Apparatebau GmbH & Co. KG
    Inventors: Fritz Müller, Klaus Heger
  • Patent number: 6973705
    Abstract: In one embodiment, a sight tube flowmeter is formed of a plurality of fluoropolymer components welded together to form a unitary flowmeter body. The components can comprise a PFA upright sight tube having two end portions, a flow conduit extending therethrough and two fitting portions that are uniquely welded onto each end of the sight tube, and a fluoropolymer float device movable to various positions within the flow conduit depending on the flow level of the fluid flowing therethrough. The float device can be of conventional design or for those flowmeter embodiments where low fluid flow rates are to be measured, an elongate float can be utilized. The floats and, in particular, a designated portion thereof, are visible through the sight tube to provide visual indication of the position, and thus the flow rate of fluid flowing through the flowmeter. In addition, alternative embodiments include the implementation of the unique sight tube and elongate float design in conventional flowmeters.
    Type: Grant
    Filed: July 2, 2004
    Date of Patent: December 13, 2005
    Assignee: Entegris, Inc.
    Inventors: John A. Leys, Steven P. Kolbow, Steven A. Fischer, Carlos Cadavid, Todd M. Ulschmid
  • Patent number: 6935190
    Abstract: An apparatus for flow rate measurement includes a body having a chamber with an inlet and an outlet and a structure, buoyant in the presence of a fluid, disposed in the chamber. The structure moves to a position in the chamber in proportion to a flow rate of the fluid flowing from the inlet to the outlet.
    Type: Grant
    Filed: April 7, 2003
    Date of Patent: August 30, 2005
    Assignee: Massachusetts Institute of Technology
    Inventors: Murray J. Height, Eun Young Hwang, Timothy J. Prestero
  • Patent number: 6915706
    Abstract: A flowmeter has an inlet body including a flow detector and an outlet body including a flow adjuster. The inlet body is fixed to the outlet body and forms a single piece assembly comprising an inlet tube and a measurement tube. The flow adjuster includes a disk turned by a knob. The disk has holes so at least one hole always faces the outlet tube, regardless of the position of the disk, to allow flow distribution without the risk of interrupting it even while flow is adjusted, and enable gradual flow adjustment.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: July 12, 2005
    Assignee: GCE S.A.S
    Inventor: Guy Rousselin
  • Patent number: 6901813
    Abstract: A flow meter alarm device easily attached to and removed from a flow meter at various locations along the length of the flow meter. The device is compatible with flow meters which have a float for measuring flow velocity. The device preferably has two housings, extending from a third housing having a display surface, that define an area for receiving a flow meter. The extending housings are preferably drawn together by a threaded member thereby clamping the device onto the flow meter. A sensor mounted on the device, preferably an optical emitter coupled with an optical receiver, is able to detect the float. When the float is detected, a signal is produced by the device notifying that the flow rate has fallen outside a desired range. The device is adjustable to function with flow meters of various different dimensions.
    Type: Grant
    Filed: May 13, 2003
    Date of Patent: June 7, 2005
    Assignee: World Wide Plastics, Inc
    Inventor: David P. Riegel
  • Patent number: 6898985
    Abstract: A method of determining the NER and vacuum quality of a cryogenic liquid container that includes the steps of providing a flow gauge having a scale provided thereon adjacent a flow volume indicator ball that is selected to provide an NER value in pounds per day lost directly from the position of the indicator ball.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: May 31, 2005
    Assignee: Cryo-Safe Products, Inc.
    Inventor: Ernie Gautreau
  • Patent number: 6889563
    Abstract: A float-type flowmeter measures the rate of a fluid flowing upwardly through a tube based on the position of a float movably disposed in the tube and including a magnetic material. A coil is wound around the tube such that the intervals gradually decrease in an axial direction. The coil is excited by an alternating current supplied from an inductance change detector. The inductance change detector detects a change in the inductance of the coil which is caused when the float moves in the axial direction, and generates a voltage. A voltage-to-position (flow rate) converter determines a flow rate from the voltage corresponding to the position of the float.
    Type: Grant
    Filed: June 5, 2003
    Date of Patent: May 10, 2005
    Assignee: SMC Kabushiki Kaisha
    Inventors: Seiji Tomita, Setsuro Kawasaki, Motohiro Sotome, Tsuyoshi Watanabe
  • Patent number: 6883388
    Abstract: A flow meter having a float slideably mounted along a float rod centrally located within a flow meter body, the float assuming a height along the flow meter float rod representative of fluid pressure. The float preferably has a cylindrical-shaped through-bore. The float rod preferably has a polygonal-shaped perimeter over substantially its entire length permitting fluid flow between the float rod outer diameter (OD) and the float inner diameter (ID) to dislodge any particulate, thereby serving a self-cleaning function. The float rod is preferably hollow and closed at its upper end and having flow inlet and flow outlet openings near its lower end communicating with a flow chamber which conveniently provides the inlet and outlet flows at the lower end of the flow meter.
    Type: Grant
    Filed: May 13, 2003
    Date of Patent: April 26, 2005
    Assignee: World Wide Plastics, Inc.
    Inventor: Donald C. Frick
  • Publication number: 20040231433
    Abstract: 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 extends into the measuring element and vertically slidable. According to the invention, a filter is installed ahead of the rebounding plate in the flow direction of the heating medium. Where the basic component extends to a cylindrical attachment affecting the flow against the rebounding plate, it is suitable to provide a number of slits in the cylindrical external wall of the lower portion of the attachment, the slits being distributed around the perimeter parallel to the axis. In this manner, dirt particles, which could impair the function of the indicator, are virtually filtered out.
    Type: Application
    Filed: May 7, 2004
    Publication date: November 25, 2004
    Inventor: Ulrich Schehl
  • Publication number: 20040226387
    Abstract: A flow meter having a float slideably mounted along a float rod centrally located within a flow meter body, the float assuming a height along the flow meter float rod representative of fluid pressure. The float preferably has a cylindrical-shaped through-bore. The float rod preferably has a polygonal-shaped perimeter over substantially its entire length permitting fluid flow between the float rod outer diameter (OD) and the float inner diameter (ID) to dislodge any particulate, thereby serving a self-cleaning function. The float rod is preferably hollow and closed at its upper end and having flow inlet and flow outlet openings near its lower end communicating with a flow chamber which conveniently provides the inlet and outlet flows at the lower end of the flow meter.
    Type: Application
    Filed: May 13, 2003
    Publication date: November 18, 2004
    Applicant: World Wide Plastics, Inc.
    Inventor: Donald C. Frick
  • Publication number: 20040226388
    Abstract: A flow meter alarm device easily attached to and removed from a flow meter at various locations along the length of the flow meter. The device is compatible with flow meters which have a float for measuring flow velocity. The device preferably has two housings, extending from a third housing having a display surface, that define an area for receiving a flow meter. The extending housings are preferably drawn together by a threaded member thereby clamping the device onto the flow meter. A sensor mounted on the device, preferably an optical emitter coupled with an optical receiver, is able to detect the float. When the float is detected, a signal is produced by the device notifying that the flow rate has fallen outside a desired range. The device is adjustable to function with flow meters of various different dimensions.
    Type: Application
    Filed: May 13, 2003
    Publication date: November 18, 2004
    Applicant: World Wide Plastics, Inc.
    Inventor: David P. Riegel
  • Patent number: 6799478
    Abstract: An anemometer that visually indicates the speed of the wind by the position of a float housed within a first chamber. The first chamber is in communication with a second chamber through a vertically extending conduit system. The second chamber is in communication with a low-pressure zone of a push differentiating system preferably a Venturi.
    Type: Grant
    Filed: October 19, 2000
    Date of Patent: October 5, 2004
    Inventor: Michael Oppenheimer
  • Publication number: 20040182173
    Abstract: A flowmeter has an inlet body including a flow detector and an outlet body including a flow adjuster. The inlet body is fixed to the outlet body and forms a single piece assembly comprising an inlet tube and a measurement tube. The flow adjuster includes a disk turned by a knob. The disk has holes so at least one hole always faces the outlet tube, regardless of the position of the disk, to allow flow distribution without the risk of interrupting it even while flow is adjusted, and enable gradual flow adjustment.
    Type: Application
    Filed: September 29, 2003
    Publication date: September 23, 2004
    Inventor: Guy Rousselin
  • Patent number: 6769310
    Abstract: A flow-indicating device is provided, comprising a tubular body adapted to direct a flow therethrough. The body has opposed ends, with one end being a downstream end, and has a flow element disposed therein. A shaping block is operably engaged with the body so as to form a constricted portion between the ends, the constricted portion of the body defining a constricted orifice having a downstream side. The constricted orifice is configured to prevent the flow element from passing therethrough. The flow element is disposed on the downstream side of the constricted portion and is configured to engage the constricted orifice when the flow is below a flow rate and to move toward the downstream end of the body as the flow increases over the flow rate to thereby indicate the flow through the body.
    Type: Grant
    Filed: June 10, 2002
    Date of Patent: August 3, 2004
    Assignee: The BOC Group, Inc.
    Inventor: Stephen John Carlson
  • Patent number: 6763731
    Abstract: A positive displacement flowmeter comprising a cylindrical enclosure and a piston movable within the enclosure between the opposite ends of the enclosure; with the piston having a diameter closely approximating the diameter of the enclosure to form a clearance seal; means for permitting a gas, the flow of which is to be measured, into one end of the enclosure for moving said piston toward the opposite end of the enclosure, means for detecting the movement of the piston between two locations along the cylindrical enclosure, means for measuring the pressure in the cylindrical enclosure and for calculating the presence of a dynamic error, if any, during said timed interval in accordance with the following equation: Error = ( P 2 - P 1 ) P 1 · Vm
    Type: Grant
    Filed: January 22, 2003
    Date of Patent: July 20, 2004
    Inventor: Harvey Padden
  • Patent number: 6758104
    Abstract: In one embodiment, a sight tube flowmeter is formed of a plurality of fluoropolymer components welded together to form a unitary flowmeter body. The components can comprise a PFA upright sight tube having two end portions, a flow conduit extending therethrough and two fitting portions that are uniquely welded onto each end of the sight tube, and a fluoropolymer float device movable to various positions within the flow conduit depending on the flow level of the fluid flowing therethrough. The float device can be of conventional design or for those flowmeter embodiments where low fluid flow rates are to be measured, an elongate float can be utilized. The floats and, in particular, a designated portion thereof, are visible through the sight tube to provide visual indication of the position, and thus the flow rate of fluid flowing through the flowmeter. In addition, alternative embodiments include the implementation of the unique sight tube and elongate float design in conventional flowmeters.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: July 6, 2004
    Assignee: Entegris, Inc.
    Inventors: John A. Leys, Steven P. Kolbow, Steve A. Fischer, Carlos Cadavid, Todd M. Ulschmid
  • Publication number: 20040089077
    Abstract: A floating-probe flowmeter for measuring the flow rate of a moving medium includes a measuring tube through which flows a medium against the force of gravity and a float capable of moving at least in the direction of the medium flow. The surface of the float that is exposed to the flow of the medium and/or the inner surface of the measuring tube at least in the area of movement of the float is/are provided with a microstructure designed to virtually eliminate the effect of the viscosity of the flowing medium on the lift of the float.
    Type: Application
    Filed: October 22, 2003
    Publication date: May 13, 2004
    Inventor: Heinz Bernard
  • Patent number: 6681644
    Abstract: A flowmeter capable of real-time fuel mass flow measurement involving extremely low fuel mass flow quanta. The flowmeter includes a dual flow path conduit system, a flow control for alternating the selection of one flow path exclusive of the other flow path, an indicator tube interfaced with the conduit system, an indicator shuttle slidably mounted in the indicator tube, and a sensor for sensing the position of the indicator shuttle relative thereto.
    Type: Grant
    Filed: April 17, 2002
    Date of Patent: January 27, 2004
    Assignee: General Motors Corporation
    Inventors: Martin E. Rosalik, Jr., Stephen Roy Dillon
  • Patent number: 6675662
    Abstract: In a flow meter, especially for liquid cooling media in injection molds, comprising a housing with an inlet and outlet conduit and inside the housing a piston that is slidable against the force of an axially acting spring by the pressure of the fluid flowing through the housing in such a way that the displacement of the piston takes place in dependence upon the flow rate and is indicated through a window, provision is made, to attain a high measuring accuracy with a simple construction, for a helical spring (22) that is guided in extension of the inlet conduit (2) in an axial direction to be disposed in such a way that the entering fluid is transported around the centrically disposed helical spring (22).
    Type: Grant
    Filed: October 19, 2001
    Date of Patent: January 13, 2004
    Assignee: Wieder GmbH
    Inventors: Klaus Wieder, Bernd Reyer
  • Patent number: 6668643
    Abstract: A optical flow-meter device comprises an outer tubular body provided with an inlet pipe fitting and an outlet pipe fitting for a fluid, and a tubular element made of transparent plastic material, which sealingly extends inside the body between the inlet and the outlet pipe fittings. The outer tubular body has two facingly arranged side openings for the insertion of a light-emitting element, and a light-receiving element connected to an electronic flow control and digital reading unit. A light-shuttering member is axially slidable within the inner tubular element and is shaped to allow the fluid to flow and at the same time to partialize or gradually shutter the light beam between the emitter and the receiver, providing an electronic signal proportional to the fluid flow running along the inner tubular element. A biasing spring member acts on the light-shuttering member to balance the fluid thrust.
    Type: Grant
    Filed: December 17, 2002
    Date of Patent: December 30, 2003
    Assignees: Hydronic Components, Inc., Fratelli Pettinaroli S.p.A.
    Inventors: Giulio Pettinaroli, Giorgio Simonotti
  • Publication number: 20030226406
    Abstract: A flow-indicating device is provided, comprising a tubular body adapted to direct a flow therethrough. The body has opposed ends, with one end being a downstream end, and has a flow element disposed therein. A shaping block is operably engaged with the body so as to form a constricted portion between the ends, the constricted portion of the body defining a constricted orifice having a downstream side. The constricted orifice is configured to prevent the flow element from passing therethrough. The flow element is disposed on the downstream side of the constricted portion and is configured to engage the constricted orifice when the flow is below a flow rate and to move toward the downstream end of the body as the flow increases over the flow rate to thereby indicate the flow through the body.
    Type: Application
    Filed: June 10, 2002
    Publication date: December 11, 2003
    Inventor: Stephen John Carlson
  • Publication number: 20030226407
    Abstract: A float-type flowmeter measures the rate of a fluid flowing upwardly through a tube based on the position of a float movably disposed in the tube and including a magnetic material. A coil is wound around the tube such that the intervals gradually decrease in an axial direction. The coil is excited by an alternating current supplied from an inductance change detector. The inductance change detector detects a change in the inductance of the coil which is caused when the float moves in the axial direction, and generates a voltage. A voltage-to-position (flow rate) converter determines a flow rate from the voltage corresponding to the position of the float.
    Type: Application
    Filed: June 5, 2003
    Publication date: December 11, 2003
    Applicant: SMC Kabushiki Kaisha
    Inventors: Seiji Tomita, Setsuro Kawasaki, Motohiro Sotome, Tsuyoshi Watanabe
  • Patent number: 6644131
    Abstract: A steam trap system is disclosed. The steam trap system includes an inlet, an outlet, and a float, with the inlet and the outlet separated by an orifice. The steam trap includes a plug operatively coupled to the float and disposed adjacent the orifice and arranged to open and close the orifice in response to movement of the float. A instrument module includes a pressure transducer arranged to detect pressure in the steam trap, a temperature transducer arranged to detect temperature within the steam trap, and an eddy current probe arranged to detect movement of the plug. A central processing unit is operatively coupled to and arranged to receive an output from each of the pressure transducer, the temperature transducer, and the eddy current probe, the central processing unit arranged to process the respective outputs to thereby determine total steam flow and total condensate flow through the steam trap.
    Type: Grant
    Filed: October 18, 2001
    Date of Patent: November 11, 2003
    Assignee: Fisher Controls International LLC
    Inventor: Timothy Ray Rebik
  • Publication number: 20030196494
    Abstract: A flowmeter capable of real-time fuel mass flow measurement involving extremely low fuel mass flow quanta. The flowmeter includes a dual flow path conduit system, a flow control for alternating the selection of one flow path exclusive of the other flow path, an indicator tube interfaced with the conduit system, an indicator shuttle slidably mounted in the indicator tube, and a sensor for sensing the position of the indicator shuttle relative thereto.
    Type: Application
    Filed: April 17, 2002
    Publication date: October 23, 2003
    Inventors: Martin E. Rosalik, JR., Stephen Roy Dillon
  • Patent number: 6626050
    Abstract: A flow sensing system capable of improving the monitored range of a flow sensing system. The flow sensing system has a transparent tube, an upper edge sensing assembly, a lower edge sensing assembly and a floating buoy. Under normal operating conditions, the lower edge sensing assembly detects the buoy exactly once during a first timing session, detects no buoy during a second timing session and detects the buoy exactly once during a third timing session. If one of the conditions is violated, a warning signal is issue to a station operator. The upper edge sensing assembly should not detect the buoy throughout the three timing sessions; otherwise, an abnormality has occurred and a warning signal is sent to the station operator. The sensing system prevents the size and length of buoy from interfering with the monitored range so that a more stable flow system is maintained.
    Type: Grant
    Filed: August 15, 2000
    Date of Patent: September 30, 2003
    Assignee: United Microelectronics Corp.
    Inventor: Chih-Wen Wang
  • Patent number: 6591694
    Abstract: A flow meter comprises a housing with a tube, a floater inside the tube, and a permanent magnet embracing the housing. The volume of a fluid being passed through the tube defines the height of the floater position in the tube. The floater is equipped with a rotation coil and bulb connected thereto. Rotating the floater in the magnetic field of the permanent magnet under the influence of a fluid induces a voltage in the coil, and the bulb is turned on making reading volume values easier and more convenient.
    Type: Grant
    Filed: June 14, 2001
    Date of Patent: July 15, 2003
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Yang-Jinn Tsai, Chang-Hsin Lin
  • Publication number: 20030110868
    Abstract: A flowmeter includes a floating body which floats freely in a stream in a measuring tube, and is acted upon by a flowing force, buoyancy and a weight. In order to generate a counterforce, a measuring spring is fixedly connected to the floating body. The floating body is preferably self-stabilized through a selection of corresponding geometrical relationships. The measuring spring can optionally be rotatably supported on the floating body and/or the measuring tube. The floating body is suitably made of light weight plastic material, so that the density (mass/volume) of the floating body matches the density of the flowing medium.
    Type: Application
    Filed: November 19, 2002
    Publication date: June 19, 2003
    Applicant: GEMU Gebruder Muller Apparatebau GmbH & Co. KG
    Inventors: Fritz Muller, Klaus Heger
  • Publication number: 20030074981
    Abstract: A steam trap system is disclosed. The steam trap system includes an inlet, an outlet, and a float, with the inlet and the outlet separated by an orifice. The steam trap includes a plug operatively coupled to the float and disposed adjacent the orifice and arranged to open and close the orifice in response to movement of the float. A instrument module includes a pressure transducer arranged to detect pressure in the steam trap, a temperature transducer arranged to detect temperature within the steam trap, and an eddy current probe arranged to detect movement of the plug. A central processing unit is operatively coupled to and arranged to receive an output from each of the pressure transducer, the temperature transducer, and the eddy current probe, the central processing unit arranged to process the respective outputs to thereby determine total steam flow and total condensate flow through the steam trap.
    Type: Application
    Filed: October 18, 2001
    Publication date: April 24, 2003
    Inventor: Timothy Ray Rebik
  • Publication number: 20030000315
    Abstract: In one embodiment, a sight tube flowmeter is formed of a plurality of fluoropolymer components welded together to form a unitary flowmeter body. The components can comprise a PFA upright sight tube having two end portions, a flow conduit extending therethrough and two fitting portions that are uniquely welded onto each end of the sight tube, and a fluoropolymer float device movable to various positions within the flow conduit depending on the flow level of the fluid flowing therethrough. The float device can be of conventional design or for those flowmeter embodiments where low fluid flow rates are to be measured, an elongate float can be utilized. The floats and, in particular, a designated portion thereof, are visible through the sight tube to provide visual indication of the position, and thus the flow rate of fluid flowing through the flowmeter. In addition, alternative embodiments include the implementation of the unique sight tube and elongate float design in conventional flowmeters.
    Type: Application
    Filed: May 28, 2002
    Publication date: January 2, 2003
    Applicant: Entegris, Inc.
    Inventors: John A. Leys, Steven P. Kolbow, Steve A. Fischer, Carlos Cadavid, Todd M. Ulschmid
  • Patent number: 6497143
    Abstract: Liquid, such as milk, enters the sealed container from an inlet at the top of the container and exits through an outlet at the bottom of the container. The quantity of liquid in the container is sensed and a microprocessor calculates the total volume of liquid. During periods of low flow, such as at the beginning and at the end of the milking cycle, the outlet is automatically closed, partially or completely, by a motorized valve connected to the microprocessor, or by a weighted float situated within the container, so as to accumulate the liquid during those periods thereby enhancing the accuracy of the measurement.
    Type: Grant
    Filed: July 17, 2000
    Date of Patent: December 24, 2002
    Inventor: Isaac Rinkewich
  • Publication number: 20020189368
    Abstract: A flow meter comprises a housing with a tube, a floater inside the tube, and a permanent magnet embracing the housing. The volume of a fluid being passed through the tube defines the height of the floater position in the tube. The floater is equipped with a rotation coil and bulb connected thereto. Rotating the floater in the magnetic field of the permanent magnet under the influence of a fluid induces a voltage in the coil, and the bulb is turned on making reading volume values easier and more convenient.
    Type: Application
    Filed: June 14, 2001
    Publication date: December 19, 2002
    Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Yang-Jinn Tsai, Chang-Hsin Lin