Patents by Inventor Frederick R. Quant
Frederick R. Quant has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11874179Abstract: There is disclosed a handheld air flow velocity measurement probe that includes a bridge circuit assembly having an airflow velocity sensor that is a resistance temperature detector (RTD) and a digitally controlled resistive element to dynamically adjust and maintain the resistance of the velocity sensor within the overheat temperature predefined range. The velocity measurement also uses a separate temperature sensor to sense the temperature of the air or gas flow. A humidity sensor is also included remote from the other sensors to measure humidity in the gas flow to be measured. All of the above described components are housed at a probe tip instead of a base as in most standard handheld probes and the digital interface at the probe tip allows the user to replace a bulky, expensive telescoping antenna with stackable extender scheme.Type: GrantFiled: March 15, 2021Date of Patent: January 16, 2024Assignee: TSI, IncorporatedInventors: Frederick R. Quant, Jugal Agarwal, Siva Iyer
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Publication number: 20210199513Abstract: There is disclosed a handheld air flow velocity measurement probe that includes a bridge circuit assembly having an airflow velocity sensor that is a resistance temperature detector (RTD) and a digitally controlled resistive element to dynamically adjust and maintain the resistance of the velocity sensor within the overheat temperature predefined range. The velocity measurement also uses a separate temperature sensor to sense the temperature of the air or gas flow. A humidity sensor is also included remote from the other sensors to measure humidity in the gas flow to be measured. All of the above described components are housed at a probe tip instead of a base as in most standard handheld probes and the digital interface at the probe tip allows the user to replace a bulky, expensive telescoping antenna with stackable extender scheme.Type: ApplicationFiled: March 15, 2021Publication date: July 1, 2021Inventors: Frederick R. Quant, Jugal Agarwal, Siva Iyer
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Patent number: 10948364Abstract: There is disclosed a handheld air flow velocity measurement probe that includes a bridge circuit assembly having an airflow velocity sensor that is a resistance temperature detector (RTD) and a digitally controlled resistive element to dynamically adjust and maintain the resistance of the velocity sensor within the overheat temperature predefined range. The velocity measurement also uses a separate temperature sensor to sense the temperature of the air or gas flow. A humidity sensor is also included remote from the other sensors to measure humidity in the gas flow to be measured. All of the above described components are housed at a probe tip instead of a base as in most standard handheld probes and the digital interface at the probe tip allows the user to replace a bulky, expensive telescoping antenna with stackable extender scheme.Type: GrantFiled: February 15, 2016Date of Patent: March 16, 2021Assignee: TSI, INCORPORATEDInventors: Frederick R. Quant, Jugal Agarwal, Siva Iyer
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Patent number: 10914667Abstract: Various embodiments include methods and systems for reducing false-particle counts in a water-based condensation particle counter (CPC). One embodiment of a method includes delivering water into multiple wicks used for transporting separate portions of an aerosol sample flow, with the wicks extending from a wick stand on a first end to a flow joiner on a second end, combining particles from the separate portions of the aerosol sample flow into a single aerosol stream within the flow joiner prior to transporting the combined aerosol sample stream into a particle detection chamber within the CPC, sensing an excess volume of water delivered to the wicks, collecting the excess volume of water in a collection reservoir, and after receiving a signal corresponding to the excess volume of water, draining the excess volume of water from the collection reservoir. Other methods, systems, and apparatuses are disclosed.Type: GrantFiled: October 25, 2019Date of Patent: February 9, 2021Assignee: TSI IncorporatedInventors: Sreenath Avula, Richard Remiarz, George John Chancellor, Tyler Anderson, Daniel C. Bjorkquist, Robert Caldow, Sean Morell, Frederick R. Quant, Susanne V. Hering, Gregory S. Lewis
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Publication number: 20200256782Abstract: Various embodiments include methods and systems to calibrate a gain of a photodetector. A method can include providing, by a reference light source, first light to a reference photodetector, determining, by controller circuitry, whether a first value from the reference photodetector produced in response to the first light is within a range of acceptable reference photodetector values, in response to determining the first value is within the range of acceptable reference photodetector values, providing, by the reference light source, second light to a measurement photodetector, determining, by the controller circuitry, whether a second value from the measurement photodetector produced in response to the second light is within a range of acceptable measurement photodetector values, and in response to determining the second value is not within the range of acceptable measurement photodetector values, adjusting a gain of the measurement photodetector.Type: ApplicationFiled: October 8, 2018Publication date: August 13, 2020Inventors: Peter Perkins Hairston, Frederick R. Quant
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Publication number: 20200124515Abstract: Various embodiments include methods of reducing false-particle counts in a water-based condensation particle counter (CPC). One embodiment of a method includes delivering water into one or more wicks, sensing an excess volume of water delivered to the wicks, collecting the excess volume of water into a collection reservoir, and draining the excess volume of water from the collection reservoir. Other methods and apparatuses are disclosed.Type: ApplicationFiled: October 25, 2019Publication date: April 23, 2020Inventors: Sreenath Avula, Richard Remiarz, George John Chancellor, Tyler Anderson, Daniel C. Bjorkquist, Robert Caldow, Sean Morell, Frederick R. Quant, Susanne V. Hering, Gregory S. Lewis
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Patent number: 10520414Abstract: Various embodiments include methods of reducing false-particle counts in a water-based condensation particle counter (CPC). One embodiment of a method includes delivering water into one or more wicks, sensing an excess volume of water delivered to the wicks, collecting the excess volume of water into a collection reservoir, and draining the excess volume of water from the collection reservoir. Other methods and apparatuses are disclosed.Type: GrantFiled: February 23, 2016Date of Patent: December 31, 2019Assignee: TSI IncorporatedInventors: Sreenath Avula, Richard Remiarz, George John Chancellor, Tyler Anderson, Daniel C. Bjorkquist, Robert Caldow, Sean Morell, Frederick R. Quant, Susanne V. Hering, Gregory S. Lewis
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Patent number: 10488314Abstract: Various embodiments include methods of reducing false-particle counts in a water-based condensation particle counter (CPC). One embodiment of a method includes delivering water into one or more wicks, sensing an excess volume of water delivered to the wicks, collecting the excess volume of water into a collection reservoir, and draining the excess volume of water from the collection reservoir. Other methods and apparatuses are disclosed.Type: GrantFiled: February 23, 2016Date of Patent: November 26, 2019Assignee: TSI IncorporatedInventors: Sreenath Avula, Richard Remiarz, George John Chancellor, Tyler Anderson, Daniel C. Bjorkquist, Robert Caldow, Sean Morell, Frederick R. Quant, Susanne V. Hering, Gregory S. Lewis
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Publication number: 20190234811Abstract: There is disclosed a handheld air flow velocity measurement probe that includes a bridge circuit assembly having an airflow velocity sensor that is a resistance temperature detector (RTD) and a digitally controlled resistive element to dynamically adjust and maintain the resistance of the velocity sensor within the overheat temperature predefined range. The velocity measurement also uses a separate temperature sensor to sense the temperature of the air or gas flow. A humidity sensor is also included remote from the other sensors to measure humidity in the gas flow to be measured. All of the above described components are housed at a probe tip instead of a base as in most standard handheld probes and the digital interface at the probe tip allows the user to replace a bulky, expensive telescoping antenna with stackable extender scheme.Type: ApplicationFiled: February 15, 2016Publication date: August 1, 2019Inventors: Frederick R. Quant, Jugar Agarwal, Siva Iyer
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Publication number: 20180238746Abstract: There is disclosed a handheld air flow velocity measurement probe that includes a bridge circuit assembly having an airflow velocity sensor that is a resistance temperature detector (RTD) and a digitally controlled resistive element to dynamically adjust and maintain the resistance of the velocity sensor within the overheat temperature predefined range. The velocity measurement also uses a separate temperature sensor to sense the temperature of the air or gas flow. A humidity sensor is also included remote from the other sensors to measure humidity in the gas flow to be measured. All of the above described components are housed at a probe tip instead of a base as in most standard handheld probes and the digital interface at the probe tip allows the user to replace a bulky, expensive telescoping antenna with stackable extender scheme.Type: ApplicationFiled: February 15, 2016Publication date: August 23, 2018Inventors: Frederick R. Quant, Jugar Agarwal, Siva Iyer
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Publication number: 20180045636Abstract: Various embodiments include methods of reducing false-particle counts in a water-based condensation particle counter (CPC). One embodiment of a method includes delivering water into one or more wicks, sensing an excess volume of water delivered to the wicks, collecting the excess volume of water into a collection reservoir, and draining the excess volume of water from the collection reservoir. Other methods and apparatuses are disclosed.Type: ApplicationFiled: February 23, 2016Publication date: February 15, 2018Inventors: Sreenath AVULA, Richard REMIARZ, George John CHANCELLOR, Tyler ANDERSON, Daniel C. BJORKQUIST, Robert CALDOW, Sean MORELL, Frederick R. QUANT, Susanne V. HERING, Gregory S. LEWIS
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Patent number: 7852465Abstract: A system for monitoring non-volatile residue concentrations in ultra pure water includes a nebulizer for generating an aerosol composed of multiple water droplets, a heating element changing the aerosol to a suspension of residue particles, and a condensation particle counter to supersaturate the dried aerosol to cause droplet growth through condensation of a liquid onto the particles. The nebulizer incorporates a flow dividing structure that divides exiting waste water into a series of droplets. The droplets are counted to directly indicate a waste water flow rate and indirectly indicate an input flow rate of water supplied to the nebulizer. The condensation particle counter employs water as the condensing medium, avoiding the need for undesirable chemical formulations and enabling use of the ultra pure water itself as the condensing medium.Type: GrantFiled: August 17, 2010Date of Patent: December 14, 2010Assignee: Fluid Measurement Technologies, Inc.Inventors: David B. Blackford, Frederick R. Quant, Derek R. Oberreit
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Publication number: 20100312499Abstract: A system for monitoring non-volatile residue concentrations in ultra pure water includes a nebulizer for generating an aerosol composed of multiple water droplets, a heating element changing the aerosol to a suspension of residue particles, and a condensation particle counter to supersaturate the dried aerosol to cause droplet growth through condensation of a liquid onto the particles. The nebulizer incorporates a flow dividing structure that divides exiting waste water into a series of droplets. The droplets are counted to directly indicate a waste water flow rate and indirectly indicate an input flow rate of water supplied to the nebulizer. The condensation particle counter employs water as the condensing medium, avoiding the need for undesirable chemical formulations and enabling use of the ultra pure water itself as the condensing medium.Type: ApplicationFiled: August 17, 2010Publication date: December 9, 2010Inventors: David B. Blackford, Frederick R. Quant, Derek R. Oberreit
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Publication number: 20100212670Abstract: Methods and systems to enable ported respirator masks to be tested in situ to ensure that they are used effectively, including the ported masks themselves.Type: ApplicationFiled: February 16, 2010Publication date: August 26, 2010Inventors: Amir H. Amighi, Frederick R. Quant, Derek R. Oberreit
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Patent number: 7777868Abstract: A system for monitoring non-volatile residue concentrations in ultra pure water includes a nebulizer for generating an aerosol composed of multiple water droplets, a heating element changing the aerosol to a suspension of residue particles, and a condensation particle counter to supersaturate the dried aerosol to cause droplet growth through condensation of a liquid onto the particles. The nebulizer incorporates a flow dividing structure that divides exiting waste water into a series of droplets. The droplets are counted to directly indicate a waste water flow rate and indirectly indicate an input flow rate of water supplied to the nebulizer. The condensation particle counter employs water as the condensing medium, avoiding the need for undesirable chemical formulations and enabling use of the ultra pure water itself as the condensing medium.Type: GrantFiled: November 6, 2007Date of Patent: August 17, 2010Assignee: Fluid Measurement Technologies, Inc.Inventors: David B. Blackford, Frederick R. Quant, Derek R. Oberreit
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Publication number: 20080144003Abstract: A system for monitoring non-volatile residue concentrations in ultra pure water includes a nebulizer for generating an aerosol composed of multiple water droplets, a heating element changing the aerosol to a suspension of residue particles, and a condensation particle counter to supersaturate the dried aerosol to cause droplet growth through condensation of a liquid onto the particles. The nebulizer incorporates a flow dividing structure that divides exiting waste water into a series of droplets. The droplets are counted to directly indicate a waste water flow rate and indirectly indicate an input flow rate of water supplied to the nebulizer. The condensation particle counter employs water as the condensing medium, avoiding the need for undesirable chemical formulations and enabling use of the ultra pure water itself as the condensing medium.Type: ApplicationFiled: November 6, 2007Publication date: June 19, 2008Inventors: David B. Blackford, Frederick R. Quant, Derek R. Oberreit
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Publication number: 20080137065Abstract: A high performance liquid chromatography system employs a nebulizer with a flow restriction at the exit of its mixing chamber to produce finer droplets, and an adjustable impactor for increased control over droplet sizes. Downstream of the mixing chamber, the nebulizer can incorporate tubing that is permeable to the sample liquid, to promote aerosol drying through perevaporation. A condensation particle counter downstream of the nebulizer uses water as the working medium, and is adjustable to control threshold nucleation sizes and droplet growth rates. A particle size selector employing diffusion, electrostatic attraction or selection based on electrical mobility, is advantageously positioned between the nebulizer and the CPC.Type: ApplicationFiled: November 6, 2007Publication date: June 12, 2008Inventors: Derek R. Oberreit, Frederick R. Quant, David B. Blackford
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Patent number: 6230572Abstract: An apparatus for classifying polydisperse aerosols includes aerosol and sheath gas conduits for conducting a sample aerosol and a sheath gas toward a merger area. At the merger area the sheath gas and about ten percent of the sample aerosol merge, then travel through a differential mobility analyzer (DMA) and along a tubular electrode of the DMA. Selected particles, i.e. particles having electrical mobilities within a narrow range, pass through a collection aperture of the electrode. The DMA output, an aerosol consisting of the selected particles, is provided to a condensation particle counter or other device for determining the aerosol concentration. The remainder of the sample aerosol is conducted away from the merger area along a bypass flow conduit. The bypass flow and an improved aerodynamic design provide for a slit at the merger area that is sufficiently narrow to minimize unwanted electric field penetration at the slit and DMA entrance.Type: GrantFiled: February 12, 1999Date of Patent: May 15, 2001Assignee: TSI IncorporatedInventors: David Y. H. Pui, Da-Ren Chen, Frederick R. Quant, Gilmore J. Sem, Heinz Fissan, Detlef Hummes, Frank Dorman
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Patent number: 5999250Abstract: An electro-optical aerosol characterizing system includes a continuous wave laser for generating two beams in the red wavelength range, intersecting a particle stream at slightly spaced apart locations. A pulsed UV laser generates a beam that intersects the particle stream at a third location downstream. Laser energy scattered by each particle as it passes the first two locations, is used to compute aerodynamic sizes and UV laser pulsing times, so that in each case the UV beam irradiates the particle at the downstream location. Particles containing biological materials or other fluorescing components emit fluorescence signals in response to the irradiation. Accordingly, the system provides information about particle composition as well as particle size.Type: GrantFiled: March 17, 1998Date of Patent: December 7, 1999Assignee: TSI CorporationInventors: Peter P. Hairston, Frederick R. Quant