Patents by Inventor Robert J. Weber

Robert J. Weber 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).

  • Patent number: 10948323
    Abstract: An electric measurement method and apparatus for detecting a mass by an electric capacity (permittivity) or a material's dielectric constant, or alternatively, electric inductance (permeability). The mass may be any phase or combination of phases. The mass may be stationary or flowing. It may comprise discrete particles such as grain, or manufactured products such as ball bearings or threaded fasteners, etc. The mass may be a flow element in a rotameter or similar flow measurement device. The sensor comprises a volume which may be completely full or only partially full of the material. The material may be discrete components or a continuum. Sensor signals may be received by existing planter monitoring systems. In some embodiments the flow sensors are positioned external to the application port. In some embodiments sensors may be utilized which are responsive to the refractive index variation of specific chemicals.
    Type: Grant
    Filed: August 4, 2020
    Date of Patent: March 16, 2021
    Assignee: AMVAC CHEMICAL CORPORATION
    Inventors: Larry M. Conrad, Robert J. Weber
  • Publication number: 20200363244
    Abstract: An electric measurement method and apparatus for detecting a mass by an electric capacity (permittivity) or a material's dielectric constant, or alternatively, electric inductance (permeability). The mass may be any phase or combination of phases. The mass may be stationary or flowing. It may comprise discrete particles such as grain, or manufactured products such as ball bearings or threaded fasteners, etc. The mass may be a flow element in a rotameter or similar flow measurement device. The sensor comprises a volume which may be completely full or only partially full of the material. The material may be discrete components or a continuum. Sensor signals may be received by existing planter monitoring systems. In some embodiments the flow sensors are positioned external to the application port. In some embodiments sensors may be utilized which are responsive to the refractive index variation of specific chemicals.
    Type: Application
    Filed: August 4, 2020
    Publication date: November 19, 2020
    Applicant: AMVAC CHEMICAL CORPORATION
    Inventors: Larry M. Conrad, Robert J. Weber
  • Patent number: 10739173
    Abstract: An electric measurement method and apparatus for detecting a mass by an electric capacity (permittivity) or a material's dielectric constant, or alternatively, electric inductance (permeability). The mass may be any phase or combination of phases. The mass may be stationary or flowing. It may comprise discrete particles such as grain, or manufactured products such as ball bearings or threaded fasteners, etc. The mass may be a flow element in a rotameter or similar flow measurement device. The sensor comprises a volume which may be completely full or only partially full of the material. The material may be discrete components or a continuum. Sensor signals may be received by existing planter monitoring systems. In some embodiments the flow sensors are positioned external to the application port. In some embodiments sensors may be utilized which are responsive to the refractive index variation of specific chemicals.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: August 11, 2020
    Assignee: AMERICAN CHEMICAL CORPORATION
    Inventors: Larry M. Conrad, Robert J. Weber
  • Publication number: 20190285448
    Abstract: An electric measurement method and apparatus for detecting a mass by an electric capacity (permittivity) or a material's dielectric constant, or alternatively, electric inductance (permeability). The mass may be any phase or combination of phases. The mass may be stationary or flowing. It may comprise discrete particles such as grain, or manufactured products such as ball bearings or threaded fasteners, etc. The mass may be a flow element in a rotameter or similar flow measurement device. The sensor comprises a volume which may be completely full or only partially full of the material. The material may be discrete components or a continuum. Sensor signals may be received by existing planter monitoring systems. In some embodiments the flow sensors are positioned external to the application port. In some embodiments sensors may be utilized which are responsive to the refractive index variation of specific chemicals.
    Type: Application
    Filed: June 4, 2019
    Publication date: September 19, 2019
    Inventors: Larry M. Conrad, Robert J. Weber
  • Patent number: 10352743
    Abstract: An electric measurement method and apparatus for detecting a mass by an electric capacity (permittivity) or a material's dielectric constant, or alternatively, electric inductance (permeability). The mass may be any phase or combination of phases. The mass may be stationary or flowing. It may comprise discrete particles such as grain, or manufactured products such as ball bearings or threaded fasteners, etc. The mass may be a flow element in a rotameter or similar flow measurement device. The sensor comprises a volume which may be completely full or only partially full of the material. The material may be discrete components or a continuum. Sensor signals may be received by existing planter monitoring systems. In some embodiments the flow sensors are positioned external to the application port. In some embodiments sensors may be utilized which are responsive to the refractive index variation of specific chemicals.
    Type: Grant
    Filed: November 26, 2017
    Date of Patent: July 16, 2019
    Assignee: SENSORS THAT COUNT, L.L.C.
    Inventors: Larry M. Conrad, Robert J. Weber
  • Patent number: 10224835
    Abstract: The invention relates to a bistable piezoelectric cantilever-based vibration energy harvester that increases the energy harvested over a broad frequency of vibrations by introducing bistability to the cantilever through use of two repelling magnets, one mounted on the cantilever and one at a location facing the first. This increases the amplitude and velocity of cantilever vibration, hence harvested power, while nonlinearity makes the system efficient over almost the entire range of frequencies, lower than the natural resonant frequency of the linear version without the magnets. Such improved performance is seen while the cantilever remains in the bistable mode.
    Type: Grant
    Filed: April 11, 2016
    Date of Patent: March 5, 2019
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Kanishka Aman Singh, Ratnesh Kumar, Robert J. Weber
  • Patent number: 10073074
    Abstract: A soil sensor includes a housing, an antenna disposed within the housing, a measurement circuit disposed within the housing and operatively connected to the antenna, the circuit configured to measure impedance of soil at a plurality of different frequencies using the antenna as a sensor electrode, and a wireless interface disposed within the housing and operatively connected to the antenna and configured for wireless communications over the antenna at its communications frequency.
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: September 11, 2018
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Ratnesh Kumar, Robert J. Weber, Gunjan Pandey
  • Patent number: 9110317
    Abstract: A pre-pulsed magnetic field generation circuit for a fiber-based, magneto-optic (MO) optical modulator or switch for use in an interferometer is provided. The pre-pulsed magnetic field is used to control the amount of rotation in the state of polarization (SOP), and therefore, the ON-OFF extinction ratio. The circuit includes a pair of amplifier circuits that control the current through a coil to generate the pre-pulsed magnetic field. One amplifier controls a magnitude of a steady state portion of the magnetic field, while the other controls both the amplitude and duration of a pre-pulse portion of the magnetic field.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: August 18, 2015
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Sasha N. Kemmet Oster, Jin-Wei Tioh, Mani Mina, Robert J. Weber
  • Patent number: 8478082
    Abstract: A fiber-based, magneto-optic (MO) optical modulator or switch based on Sagnac interferometry is provided. The system uses a magneto-optic Faraday rotator (MOFR) to produce optical modulation with low magnetic fields. The Sagnac geometry allows for increased modulation at lower fields than traditional MO modulators. This switch uses the MOFR to create different states of polarization in counter-propagating waves, which results in interference at the output port. A magnetic field is used to control the amount of rotation in the state of polarization (SOP), and therefore, the ON-OFF extinction ratio.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: July 2, 2013
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Sasha N. Kemmet, Jin-Wei Tioh, Mani Mina, Robert J. Weber
  • Patent number: 8169322
    Abstract: A passive RFID tag suitable for attachment to an electrically conductive surface is provided. The passive RFID tag includes a dielectric substrate, an RFID chip for storing data, and an RFID antenna structure operatively connected to the RFID chip wherein the RFID antenna structure comprises a slotted inverted L-shape. A method of manufacturing a passive RFID tag includes forming an antenna structure on a conductive layer, the antenna structure comprising a slotted inverted L-shape. The method further includes operatively connecting an RFID chip with the antenna structure. A method associated with a passive RFID tag includes providing a passive RFID tag. The passive RFID tag includes a dielectric substrate, an RFID chip for storing data, and an RFID antenna structure operatively connected to the RFID chip wherein the RFID antenna structure comprises a slotted inverted L-shape. The method further includes operatively connecting the passive RFID tag to a conductive surface.
    Type: Grant
    Filed: November 7, 2008
    Date of Patent: May 1, 2012
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Sanyi Zhan, Robert J. Weber
  • Patent number: 8013791
    Abstract: A method of spatial control of a phased array system having a plurality of antenna elements is provided. The method includes providing a baseband signal, baseband phase shifting the baseband signal to provide a plurality of baseband shifted signals for controlling phase of each of the plurality of antenna elements, upconverting each of the baseband shifted signals to a radio frequency signal, and applying each of the radio frequency signals to the plurality of antenna elements to thereby provide for spatial control of the phased array system. A hardware architecture for a phased array system is also provided.
    Type: Grant
    Filed: July 30, 2008
    Date of Patent: September 6, 2011
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Robert J. Weber, Shannon Wanner, Hsin-Jan Fu, Saalini Sekar
  • Patent number: 7916982
    Abstract: An integrated fiber optic switch based on the magneto-optic effect of magnetic materials suitable for optical fiber networks is presented. The switch is based on the Faraday Effect exhibited by magneto-optic materials. The all-fiber magneto-optic switch has a beam splitter at the input that splits an incoming signal into orthogonal polarized paths. Each path has at least one magneto-optic Faraday rotator (MOFR) controlled by a field. When the field is present, the polarization of the optical beam changes, thereby turning the switch on or off. A beam coupler couples the orthogonal polarized paths at the output of the all-fiber magneto-optic switch. The switch is constructed in the Mach-Zehnder configuration, utilizing two 3 dB couplers, isolators and MOFRs fabricated on silicon-on-insulator.
    Type: Grant
    Filed: April 30, 2008
    Date of Patent: March 29, 2011
    Assignee: Iowa State University Research Foundation
    Inventors: Rashmi Bahuguna, Mani Mina, Robert J. Weber
  • Publication number: 20110026869
    Abstract: A fiber-based, magneto-optic (MO) optical modulator or switch based on Sagnac interferometry is provided. The system uses a magneto-optic Faraday rotator (MOFR) to produce optical modulation with low magnetic fields. The Sagnac geometry allows for increased modulation at lower fields than traditional MO modulators. This switch uses the MOFR to create different states of polarization in counter-propagating waves, which results in interference at the output port. A magnetic field is used to control the amount of rotation in the state of polarization (SOP), and therefore, the ON-OFF extinction ratio.
    Type: Application
    Filed: July 29, 2010
    Publication date: February 3, 2011
    Applicant: IOWA STATE UNIVERSITY RESEARCH FOUNDATION, INC.
    Inventors: Sasha N. Kemmet, Jin-Wei Tioh, Mani Mina, Robert J. Weber
  • Patent number: 7555177
    Abstract: A fiber optic switch based on the magneto-optic effect of magnetic materials is presented. Due to the optical fiber based construction of the switching device it is suitable for optical fiber networks The on-off function of the switch is useful for isolation and connection of node(s) from a fiber optical network without having to turn off a laser. The switch is based on the Faraday Effect exhibited by magneto-optic materials. The all-fiber magneto-optic switch has a beam splitter at the input that splits an incoming signal into orthogonal polarized paths. Each path has at least one magneto-optic Faraday rotator (MOFR) controlled by a field. When the field is present, the polarization of the optical beam changes, thereby turning the switch on or off depending on the initial polarization of the beam. A beam coupler couples the orthogonal polarized paths at the output of the all-fiber magneto-optic switch. The MOFR is a bismuth substituted iron garnet.
    Type: Grant
    Filed: April 11, 2007
    Date of Patent: June 30, 2009
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Rashmi Bahuguna, Mani Mina, Robert J. Weber
  • Patent number: 7160183
    Abstract: A buff is made from a non-woven fabric where the fibers are first carded and formed into a fairly thick fleece. The fleece is passed over a topographical surface on, for example, a moving belt or a drum. The fleece is subject to a bow-tie hydroentanglement process where many fine jets of water entangle the fibers on the topographical surface. Excess water is vacuumed from the system. The fabric is dried and chemically treated. With the fabric a variety of buffing tools are made, in wheel, belt or roll form. Tests against standard and mill treatment buffs show a remarkably lower fabric weight loss percentage and lower or normal operating temperatures. The fabric has exceptional mechanical strength having a tensile strength in excess of 650 N/50 mm according to DIN 29073/3. Preferably the fabric has a tensile strength of at least 1,000 N/50 mm in the machine direction and in excess of 900 N/50 mm in the cross direction according to such DIN.
    Type: Grant
    Filed: May 8, 2003
    Date of Patent: January 9, 2007
    Assignee: Jason Incorporated
    Inventor: Robert J. Weber
  • Patent number: 6876283
    Abstract: The invention provides tapered-width micro-cantilevers and micro-bridges that give additional design parameters for controlling and synthesizing pull-in (i.e., actuation) voltages. The pull-in voltage of a tapered-width micro-cantilever is generally a function of the taper function of the width along the length, the initial width, and the length of the micro-cantilever. By controlling these design parameters, a specific pull-in voltage for a micro-cantilever is obtained. The formula for a pull-in voltage is determined based on the geometry of the micro-cantilever device and a plurality of derived pull-in voltages. The pull-in voltage is derived by iteratively solving a displacement vector as a function of applied voltage across the micro-cantilever device and setting the pull-in voltage to the voltage at which the solution does not converge. The formula is derived for linear-tapered width, parabolic-tapered width and exponential-tapered width micro-cantilevers.
    Type: Grant
    Filed: July 11, 2003
    Date of Patent: April 5, 2005
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Robert J. Weber, Chieh-Hsiao Wang
  • Publication number: 20030194962
    Abstract: A buff is made from a non-woven fabric where the fibers are first carded and formed into a fairly thick fleece. The fleece is passed over a topographical surface on, for example, a moving belt or a drum. The fleece is subject to a bow-tie hydroentanglement process where many fine jets of water entangle the fibers on the topographical surface. Excess water is vacuumed from the system. The fabric is dried and chemically treated. With the fabric a variety of buffing tools are made, in wheel, belt or roll form. Tests against standard and mill treatment buffs show a remarkably lower fabric weight loss percentage and lower or normal operating temperatures. The fabric has exceptional mechanical strength having a tensile strength in excess of 650 N/50 mm according to DIN 29073/3. Preferably the fabric has a tensile strength of at least 1,000 N/50 mm in the machine direction and in excess of 900 N/50 mm in the cross direction according to such DIN.
    Type: Application
    Filed: May 8, 2003
    Publication date: October 16, 2003
    Inventor: Robert J. Weber
  • Patent number: 6595843
    Abstract: A buff is made from a non-woven fabric where the fibers are first carded and formed into a fairly thick fleece. The fleece is passed over a topographical surface on, for example, a moving belt or a drum. The fleece is subject to a bow-tie hydroentanglement process where many fine jets of water entangle the fibers on the topographical surface. Excess water is vacuumed from the system. The fabric is dried and chemically treated. With the fabric a variety of buffing tools are made, in wheel, belt or roll form. Tests against standard and mill treatment buffs show a remarkably lower fabric weight loss percentage and lower or normal operating temperatures. The fabric has exceptional mechanical strength having a tensile strength in excess of 650 N/50 mm according to DIN 29073/3. Preferably the fabric has a tensile strength of at least 1,000 N/50 mm in the machine direction and in excess of 900 N/50 mm in the cross direction according to such DIN.
    Type: Grant
    Filed: October 31, 2000
    Date of Patent: July 22, 2003
    Assignee: Jason Incorporated
    Inventor: Robert J. Weber
  • Patent number: 6346888
    Abstract: A non-resonant electromagnetic energy sensor includes an electromagnetic energy source and an electromagnetic energy detector in communication with the interior volume of a measuring region through which an analyte passes. The electromagnetic energy detector detects the signal variations of the electromagnetic energy within the measuring region caused by the perturbation of the electromagnetic energy field due to the passage of the analyte therethrough and responds to these signal variations by generating output signals. These output signals may then be received by electronic circuitry designed for quantitative and/or qualitative detection of the flow of various substances including individual particles, particles flowing as a continuum, and non-turbulent fluids.
    Type: Grant
    Filed: February 1, 2001
    Date of Patent: February 12, 2002
    Inventors: Larry M. Conrad, Robert J. Weber
  • Patent number: 6208255
    Abstract: A non-resonant electromagnetic energy sensor which generates output signals upon the quantitative and/or qualitative detection of the flow of various substances including solid particles flowing as discrete individual particles or as a continuum, as well as the flow of liquids and/or gaseous substances. The non-resonant electromagnetic energy sensor may be interfaced with various types of electronic circuitry whereby the generated output signals may be used for monitoring a variety of flowing substances, for example, seed flow in an agricultural planter, crop yield on a combine harvester, and flow rates of liquids or gaseous fluids through conduits. The sensor comprises a housing having wall members defining a chamber having an interior volume. The sensor is designed to be interposed along a length of conduit through which the material or substance to be analyzed will pass. An electromagnetic energy source and an electromagnetic energy detector are in communication with the interior volume of the chamber.
    Type: Grant
    Filed: October 20, 1999
    Date of Patent: March 27, 2001
    Inventors: Larry M. Conrad, Robert J. Weber