Patents by Inventor Gabriel Leen
Gabriel Leen 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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Publication number: 20240181441Abstract: An apparatus provides precise steering of inkjet droplets to a substrate by use of multipole arrangement with electrodes on a resistive plate. There may be droplet detection based on charge sensing. A hexagonal spiral deposition pattern on a target substrate allows fast uniform printing covering a nearly circular hexagonal area. There may be six electrodes arranged to form a cubic enclosure, and injected droplets may be merged within the enclosure, and their charge controlled by merging of source droplets of differing charges to provide a net charge for biasing onward steering.Type: ApplicationFiled: February 17, 2022Publication date: June 6, 2024Applicant: POLY PICO TECHNOLOGIES LIMITEDInventors: Gabriel LEEN, Nikolay PAVLOV
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Publication number: 20240011855Abstract: The present invention relates to a diaphragm for a pressure sensor, the diaphragm comprising a hybrid sol-gel film. The invention also extends to a process for the manufacture of said diaphragm for a pressure sensor and to a pressure sensor comprising said diaphragm.Type: ApplicationFiled: September 28, 2021Publication date: January 11, 2024Inventors: Gabriel LEEN, Fintan MCGUINNESS, Muhammad Mahmood ALI, Elfed LEWIS, Mohamed OUBAHA
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Patent number: 10527502Abstract: A temperature sensor (1) has a pressure sensor (10), the distal end of which is inserted in a sealed chamber (2) filled with a liquid. The pressure sensor has a light guide (4), a cavity (14) at a distal end of the light guide, a diaphragm (11) forming a wall of the cavity and being configured to deflect with applied pressure, and a detector to detect changes in light reflection due to deflection of the diaphragm. The liquid (3) which changes volume in response to temperature changes and this volume change is sufficient to change the pressure applied on the diaphragm (11), and the a interrogation system processes pressure data and/or light reflection data to generate an output indicating temperature of the fluid in the chamber.Type: GrantFiled: May 21, 2016Date of Patent: January 7, 2020Assignee: UNIVERSITY OF LIMERICKInventors: Sven Poeggel, Dinesh Babu Duraibabu, Gabriel Leen, Gerard Dooly, Elfed Lewis
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Publication number: 20180136055Abstract: A temperature sensor (1) has a pressure sensor (10), the distal end of which is inserted in a sealed chamber (2) filled with a liquid. The pressure sensor has a light guide (4), a cavity (14) at a distal end of the light guide, a diaphragm (11) forming a wall of the cavity and being configured to deflect with applied pressure, and a detector to detect changes in light reflection due to deflection of the diaphragm. The liquid (3) which changes volume in response to temperature changes and this volume change is sufficient to change the pressure applied on the diaphragm (11), and the a interrogation system processes pressure data and/or light reflection data to generate an output indicating temperature of the fluid in the chamber.Type: ApplicationFiled: May 21, 2016Publication date: May 17, 2018Applicant: UNIVERSITY OF LIMERICKInventors: Sven POEGGEL, Dinesh Babu DURAIBABU, Gabriel LEEN, Gerard DOOLY, Elfed LEWIS
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Publication number: 20160288117Abstract: An apparatus for dispensing droplets comprises a dispensing tip (2, 190, 210) with an orifice (4) having a cross sectional area in the range of 0.00002 mm2 to 0.03 mm2. An actuator assembly (13-15, 50, 80) comprising an actuator element engages with and disengage from the tip and, when engaged, couples acoustic energy to liquid in the tip to expel the liquid through the orifice as a droplet. The actuator assembly includes one or more piezo elements, which may be in the form of piezo stacks. In some embodiments, the actuator assembly comprises a plurality of jaws (51, 52, 61) adapted to move to engage with the dispensing tip for dispensing. This allows side loading of the tip (180) followed by movement of the actuator assembly (153) to engage the tip (180).Type: ApplicationFiled: June 9, 2016Publication date: October 6, 2016Applicant: University of LimerickInventors: Gabriel LEEN, Bernard BRYCE
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Patent number: 9387492Abstract: An apparatus for dispensing droplets comprises a dispensing tip with an orifice having a cross sectional area in the range of 0.00002 mm2 to 0.03 mm2. An actuator assembly comprising an actuator element engages with and disengage from the tip and, when engaged, couples acoustic energy to liquid in the tip to expel the liquid through the orifice as a droplet. The actuator assembly includes one or more piezo elements, which may be in the form of piezo stacks. In some embodiments, the actuator assembly comprises a plurality of jaws adapted to move to engage with the dispensing tip for dispensing. This allows side loading of the tip followed by movement of the actuator assembly to engage the tip.Type: GrantFiled: September 7, 2011Date of Patent: July 12, 2016Assignee: UNIVERSITY OF LIMERICKInventors: Gabriel Leen, Bernard Bryce
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Publication number: 20150077736Abstract: A sensor (1) has a light conductor (2) having a grating (FBG), a cavity (5), and a transparent cavity end wall (4), a light emitter for directing light through the conductor, and a light detector for detecting reflected light, and a processor. The processor is adapted to analyse light reflected due to the grating (FBG, 6) to determine an indication of temperature, light reflected from the end (7) of the cavity (5) to determine an indication of pressure, and also light reflected from the outer surface (8) of the cavity wall (4) to determine an indication of refractive index of a medium outside said cavity wall. The processor may use one output to compensate another, for example pressure and temperature may be used to compensate for variation in refractive index.Type: ApplicationFiled: March 19, 2013Publication date: March 19, 2015Applicant: UNIVERSITY OF LIMERICKInventors: Thomas Reinsch, Kort Bremer, Elfed Lewis, Gabriel Leen, Steffen Lochmann
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Patent number: 8764678Abstract: A pressure sensor (10 for medical applications comprises a silica optical fiber extrinsic Fabry-Perot interferometric (EFPI) pressure sensor (2) and an in-fiber Bragg grating (FBG, 3). The cavity of the EFPI pressure sensor (2) is formed by the end face of the FBG (3), a glass capillary (5) and a glass diaphragm (6). The glass diaphragm (6) is secured in place by a fusion splice (7) and the glass capillary (5) by a fusion splice (8). As illustrated, incident light is directed into the FBG 3 and there are reflections in the EFPI pressure sensor (2). Applied pressure causes a deflection of the glass diaphragm (6) and hence modulation of the EFPI sensor (2) cavity. The FBG (3) is used as a reference sensor to eliminate temperature cross-sensitivity of the EFPI pressure sensor (2). The EFPI cavity was fabricated using a 200 ?m silica glass fiber, a 133/220 ?m (inner/outer diameter) silica glass capillary and a standard telecommunication FBG.Type: GrantFiled: January 31, 2011Date of Patent: July 1, 2014Assignee: University of LimerickInventors: Kort Bremer, Gabriel Leen, Elfed Lewis, Brian J. Moss, Steffen Lochmann, Ingo Mueller
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Publication number: 20130153677Abstract: An apparatus for dispensing droplets comprises a dispensing tip with an orifice having a cross sectional area in the range of 0.00002 mm2 to 0.03 mm2. An actuator assembly comprising an actuator element engages with and disengage from the tip and, when engaged, couples acoustic energy to liquid in the tip to expel the liquid through the orifice as a droplet. The actuator assembly includes one or more piezo elements, which may be in the form of piezo stacks. In some embodiments, the actuator assembly comprises a plurality of jaws adapted to move to engage with the dispensing tip for dispensing. This allows side loading of the tip followed by movement of the actuator assembly to engage the tip.Type: ApplicationFiled: September 7, 2011Publication date: June 20, 2013Applicant: University of LimerickInventors: Gabriel Leen, Bernard Bryce
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Publication number: 20110190640Abstract: A pressure sensor (10 for medical applications comprises a silica optical fiber extrinsic Fabry-Perot interferometric (EFPI) pressure sensor (2) and an in-fiber Bragg grating (FBG, 3). The cavity of the EFPI pressure sensor (2) is formed by the end face of the FBG (3), a glass capillary (5) and a glass diaphragm (6). The glass diaphragm (6) is secured in place by a fusion splice (7) and the glass capillary (5) by a fusion splice (8). As illustrated, incident light is directed into the FBG 3 and there are reflections in the EFPI pressure sensor (2). Applied pressure causes a deflection of the glass diaphragm (6) and hence modulation of the EFPI sensor (2) cavity. The FBG (3) is used as a reference sensor to eliminate temperature cross-sensitivity of the EFPI pressure sensor (2). The EFPI cavity was fabricated using a 200 ?m silica glass fiber, a 133/220 ?m (inner/outer diameter) silica glass capillary and a standard telecommunication FBG.Type: ApplicationFiled: January 31, 2011Publication date: August 4, 2011Inventors: Kort Bremer, Gabriel Leen, Elfed Lewis, Brian J. Moss, Steffen Lochmann, Ingo Mueller