Patents by Inventor Akira Nakatsu

Akira Nakatsu 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).

  • Publication number: 20220155219
    Abstract: Provided is a liquid sensor that can more accurately detect the state of a liquid. The liquid sensor includes a light emitting element, an optical waveguide, a light receiving element, and a detection circuit. The light receiving element is configured to receive light that was emitted by the light emitting element and passed through the optical waveguide. The detection circuit is configured to detect output of the light receiving element. The optical waveguide includes a first pillar portion that extends straight and a second pillar portion that extends straight. The second pillar portion is provided at a position opposing the first pillar portion. A space for liquid is formed between the first pillar portion and the second pillar portion. The first pillar portion includes a first end surface that faces the light emitting element, and a second end surface that is tilted relative to the first end surface and reflects light toward the second pillar portion.
    Type: Application
    Filed: October 29, 2021
    Publication date: May 19, 2022
    Applicant: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Akira NAKATSU, Kentaro WATANABE
  • Publication number: 20220155128
    Abstract: Provided is a liquid sensor or the like that is relatively easy to manufacture. The liquid sensor includes a light emitting element, an optical waveguide, a light receiving element, and a detection circuit. The optical waveguide includes a first pillar portion, a first metal plate, a second pillar portion, and a second metal plate. The first metal plate is embedded in the first pillar portion. The second pillar portion is provided at a position opposing the first pillar portion. The second metal plate is embedded in the second pillar portion. A space for liquid is formed between the first pillar portion and the second pillar portion. The first pillar portion includes a first end surface that faces the light emitting element. The first metal plate includes a first reflecting portion that is tilted relative to the first end surface and reflects light toward the second pillar portion. The second pillar portion includes a second end surface that faces the light receiving element.
    Type: Application
    Filed: October 29, 2021
    Publication date: May 19, 2022
    Applicant: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Akira NAKATSU, Kentaro WATANABE
  • Publication number: 20210255023
    Abstract: Provided is a liquid sensor capable of relatively accurately detecting the liquid level even if vibration or the like occurs. The liquid sensor is configured to detect a liquid level in a state in which at least a portion of the liquid sensor is immersed in liquid. This liquid sensor includes a substrate. The substrate is provided with a hole. An inner circumferential surface of the substrate is formed around the hole. A first electrode and a second electrode facing the first electrode are formed on the inner circumferential surface. The liquid sensor further includes a detection circuit. The detection circuit is configured to detect capacitance between the first and second electrodes.
    Type: Application
    Filed: February 18, 2021
    Publication date: August 19, 2021
    Applicant: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Tatsunari KOYAMA, Akira NAKATSU
  • Patent number: 11035893
    Abstract: The present invention intends to provide a liquid sensor device that achieves both the improvement of durability and the improvement of property determination accuracy. The liquid sensor device includes: an electrode pair 22 that is formed on a sensor board 2 and covered by an insulating protective film 201; a resistance measurement part 302 that supplies AC current to the electrode pair 22 to measure the resistance value of oil 4; a parasitic capacitance storage part 304 that holds the parasitic capacitance Cs of the electrode pair 22; and a property determination part 313 that, on the basis of the resistance value R1 and the parasitic capacitance Cs, determines the deterioration of the oil 4.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: June 15, 2021
    Assignee: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Tatsunari Koyama, Akira Nakatsu
  • Publication number: 20200363390
    Abstract: An oil condition determination system includes a resistance value measurement unit and a determination unit. The resistance value measurement unit applies a measurement voltage between a pair of measurement electrodes in contact with oil to measure a resistance value of the oil. The determination unit determines, when a change tendency of the resistance value of the oil is reversed, that condition of the oil is changed.
    Type: Application
    Filed: January 30, 2019
    Publication date: November 19, 2020
    Inventors: Masatoshi SASAKI, Yasuteru ASAKAWA, Tomomi HONDA, Tatsunari KOYAMA, Akira NAKATSU
  • Patent number: 10827604
    Abstract: A method for producing a high frequency circuit board includes forming an antenna pattern on an upper surface of the provisional substrate. The method includes performing hot-press in a state where a thermoplastic resin and a provisional conductor are stacked on the upper surface of the provisional substrate, to form a first dielectric layer portion covering the antenna pattern. The method includes removing the provisional conductor and shaving the first dielectric layer portion to form a cavity to house an electronic component. The method includes mounting the electronic component on the antenna pattern in the cavity. The method includes performing hot-press in a state where a thermosetting resin and a ground conductor are stacked at an opening side of the cavity in the first dielectric layer portion, to form a second dielectric layer portion to embed the electronic component in the cavity. The method includes removing the provisional substrate.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: November 3, 2020
    Assignee: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Takeshi Okunaga, Akira Nakatsu, Kojiro Iwasa, Yusuke Natsuhara
  • Publication number: 20200260572
    Abstract: A method for producing a high frequency circuit board includes forming an antenna pattern on an upper surface of the provisional substrate. The method includes performing hot-press in a state where a thermoplastic resin and a provisional conductor are stacked on the upper surface of the provisional substrate, to form a first dielectric layer portion covering the antenna pattern. The method includes removing the provisional conductor and shaving the first dielectric layer portion to form a cavity to house an electronic component. The method includes mounting the electronic component on the antenna pattern in the cavity. The method includes performing hot-press in a state where a thermosetting resin and a ground conductor are stacked at an opening side of the cavity in the first dielectric layer portion, to form a second dielectric layer portion to embed the electronic component in the cavity. The method includes removing the provisional substrate.
    Type: Application
    Filed: July 2, 2019
    Publication date: August 13, 2020
    Applicant: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Takeshi OKUNAGA, Akira NAKATSU, Kojiro IWASA, Yusuke NATSUHARA
  • Publication number: 20200003813
    Abstract: The present invention intends to provide a liquid sensor device that achieves both the improvement of durability and the improvement of property determination accuracy. The liquid sensor device includes: an electrode pair 22 that is formed on a sensor board 2 and covered by an insulating protective film 201; a resistance measurement part 302 that supplies AC current to the electrode pair 22 to measure the resistance value of oil 4; a parasitic capacitance storage part 304 that holds the parasitic capacitance Cs of the electrode pair 22; and a property determination part 313 that, on the basis of the resistance value R1 and the parasitic capacitance Cs, determines the deterioration of the oil 4.
    Type: Application
    Filed: June 12, 2019
    Publication date: January 2, 2020
    Applicant: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Tatsunari KOYAMA, Akira NAKATSU
  • Patent number: 10079436
    Abstract: [Object] To improve the directional characteristics of a planar antenna for a milliwave band as well as widening a bandwidth. [Means for Settlement] A feed line 13 has a main feed line 21, two sub-feed lines 22, and a distributor S2 adapted to branch the main feed line 21 into the two sub-feed lines 22. The distributor S2 includes: two outer edges 30L and 30R formed as curved lines connecting both side edges 21L and 21R of the main feed line 21 to first edges 221 of the sub-feed lines 22; and an inner edge 31 connecting second edges 222 of the sub-feed lines 22 to each other, in which the inner edge 31 is configured to include two inner curved lines 31L and 31R that are convex in mutual directions, and has a pointed shape that is concave toward the main feed line 21 side.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: September 18, 2018
    Assignee: Nippon Pillar Packing Co., Ltd.
    Inventors: Takeshi Okunaga, Akira Nakatsu
  • Patent number: 9972900
    Abstract: Provided is a distributor capable of reducing insertion loss while suppressing a ratio in power distribution among output lines from being changed. The distributor 4 is a distributor that is connected with an input line Lin and output lines Lo1 to Lo3 respectively formed on a dielectric substrate 10 as microstrip lines, and distributes to the output lines Lo1 to Lo3 high frequency power fed from a feeding point to a branching point through the input line Lin. In addition, the distributor 4 is configured to include a stub area 42 that is formed in the input line Lin, is separated from the branching point 41, and has a rectangular shape wider than line widths of a first area La and a second area Lb of the input line Lin.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: May 15, 2018
    Assignees: Fujitsu Ten Limited, Nippon Pillar Packing Co., Ltd.
    Inventors: Takeshi Okunaga, Akira Nakatsu, Eisuke Hayakawa, Hiroaki Yoshitake
  • Patent number: 9705196
    Abstract: In an antenna, an antenna element interval is reduced without depending on an interval between converters, to widen the range of a phase folding angle to widen a detection angle range. The antenna includes a first antenna element including a feeder line extending from a first converter and a plurality of radiating elements. A second antenna element includes a feeder line extending from a second converter aligned together with the first converter and a plurality of radiating elements. The first and second antenna elements respectively include, at partial line portions of the feeder lines which extend from the converters to closest radiating elements, bend portions which are bent in directions which the bend portions come close to each other. The partial line portions of the first and second antenna elements are disposed so as to be linearly symmetrical about a virtual line.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: July 11, 2017
    Assignees: Nippon Pillar Packing Co., Ltd, Fujitsu Ten Limited
    Inventors: Takeshi Okunaga, Akira Nakatsu, Eisuke Hayakawa, Hiroaki Yoshitake
  • Patent number: 9627775
    Abstract: To provide a microstrip antenna that can radiate electromagnetic waves in two or more different directions while suppressing an increase in manufacturing cost. The microstrip antenna is configured to include: a dielectric substrate 10 that is adapted to be of a folded flat plate shape; two or more radiating patterns 2 for radiating electromagnetic waves; and a connecting pattern 3 for mutually connecting the radiating patterns 2 and feeding electricity from a common feeding point 4 to each of the radiating patterns 2. The radiating patterns 2 and connecting pattern 3 are respectively adapted as microstrip lines formed on the dielectric substrate 10, and the dielectric substrate 10 is folded such that the connecting pattern 3 intersects with a ridge line 5, and has two or more radiating surfaces 10a to 10c of which normal directions are mutually different.
    Type: Grant
    Filed: April 14, 2014
    Date of Patent: April 18, 2017
    Assignee: Nippon Pillar Packing Co., Ltd.
    Inventors: Akira Nakatsu, Koji Onishi
  • Patent number: 9543643
    Abstract: An antenna device according to an embodiment includes a dielectric substrate, a housing, and an interference prevention unit. On the top surface side of the dielectric substrate, a plurality of antennas is formed, and on the bottom surface side, a ground is formed, each as a conductive thin film pattern, respectively. The housing is formed of a conductive material, and formed to have a shape configured to function as a waveguide, and the top surface side of the housing is bonded to the bottom surface side of the dielectric substrate. The interference prevention unit is formed between the neighboring antennas to include at least a groove provided on the top surface side of the housing and a slit provided on the ground in the portion corresponding to the groove.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: January 10, 2017
    Assignees: FUJITSU TEN LIMITED, NIPPON PILLAR PACKING CO., LTD
    Inventors: Eisuke Hayakawa, Takeshi Okunaga, Akira Nakatsu
  • Publication number: 20160359238
    Abstract: [Object] To improve the directional characteristics of a planar antenna for a milliwave band as well as widening a bandwidth. [Means for Settlement] A feed line 13 has a main feed line 21, two sub-feed lines 22, and a distributor S2 adapted to branch the main feed line 21 into the two sub-feed lines 22. The distributor S2 includes: two outer edges 30L and 30R formed as curved lines connecting both side edges 21L and 21R of the main feed line 21 to first edges 221 of the sub-feed lines 22; and an inner edge 31 connecting second edges 222 of the sub-feed lines 22 to each other, in which the inner edge 31 is configured to include two inner curved lines 31L and 31R that are convex in mutual directions, and has a pointed shape that is concave toward the main feed line 21 side.
    Type: Application
    Filed: February 4, 2015
    Publication date: December 8, 2016
    Applicant: Nippon Pillar Packing Co., Ltd.
    Inventors: Takeshi Okunaga, Akira Nakatsu
  • Publication number: 20160079674
    Abstract: Provided is a distributor capable of reducing insertion loss while suppressing a ratio in power distribution among output lines from being changed. The distributor 4 is a distributor that is connected with an input line Lin and output lines Lo1 to Lo3 respectively formed on a dielectric substrate 10 as microstrip lines, and distributes to the output lines Lo1 to Lo3 high frequency power fed from a feeding point to a branching point through the input line Lin. In addition, the distributor 4 is configured to include a stub area 42 that is formed in the input line Lin, is separated from the branching point 41, and has a rectangular shape wider than line widths of a first area La and a second area Lb of the input line Lin.
    Type: Application
    Filed: August 27, 2015
    Publication date: March 17, 2016
    Applicants: Nippon Pillar Packing Co., Ltd., Fujitsu Ten Limited
    Inventors: Takeshi Okunaga, Akira Nakatsu, Eisuke Hayakawa, Hiroaki Yoshitake
  • Publication number: 20150255870
    Abstract: In an antenna, an antenna element interval is reduced without depending on an interval between converters, to widen the range of a phase folding angle to widen a detection angle range. The antenna includes a first antenna element including a feeder line extending from a first converter and a plurality of radiating elements. A second antenna element includes a feeder line extending from a second converter aligned together with the first converter and a plurality of radiating elements. The first and second antenna elements respectively include, at partial line portions of the feeder lines which extend from the converters to closest radiating elements, bend portions which are bent in directions which the bend portions come close to each other. The partial line portions of the first and second antenna elements are disposed so as to be linearly symmetrical about a virtual line.
    Type: Application
    Filed: March 6, 2015
    Publication date: September 10, 2015
    Inventors: Takeshi Okunaga, Akira Nakatsu, Eisuke Hayakawa, Hiroaki Yoshitake
  • Publication number: 20140306846
    Abstract: To provide a microstrip antenna that can radiate electromagnetic waves in two or more different directions while suppressing an increase in manufacturing cost. The microstrip antenna is configured to include: a dielectric substrate 10 that is adapted to be of a folded flat plate shape; two or more radiating patterns 2 for radiating electromagnetic waves; and a connecting pattern 3 for mutually connecting the radiating patterns 2 and feeding electricity from a common feeding point 4 to each of the radiating patterns 2. The radiating patterns 2 and connecting pattern 3 are respectively adapted as microstrip lines formed on the dielectric substrate 10, and the dielectric substrate 10 is folded such that the connecting pattern 3 intersects with a ridge line 5, and has two or more radiating surfaces 10a to 10c of which normal directions are mutually different.
    Type: Application
    Filed: April 14, 2014
    Publication date: October 16, 2014
    Applicant: Nippon Pillar Packing Co., Ltd.
    Inventors: Akira Nakatsu, Koji Onishi
  • Publication number: 20140292606
    Abstract: An antenna device according to an embodiment includes a dielectric substrate, a housing, and an interference prevention unit. On the top surface side of the dielectric substrate, a plurality of antennas is formed, and on the bottom surface side, a ground is formed, each as a conductive thin film pattern, respectively. The housing is formed of a conductive material, and formed to have a shape configured to function as a waveguide, and the top surface side of the housing is bonded to the bottom surface side of the dielectric substrate. The interference prevention unit is formed between the neighboring antennas to include at least a groove provided on the top surface side of the housing and a slit provided on the ground in the portion corresponding to the groove.
    Type: Application
    Filed: December 18, 2013
    Publication date: October 2, 2014
    Applicants: NIPPON PILLAR PACKING CO., LTD., FUJITSU TEN LIMITED
    Inventors: Eisuke HAYAKAWA, Takeshi OKUNAGA, Akira NAKATSU
  • Patent number: 7584709
    Abstract: A sewing frame for extending and holding a sewing cloth is provided with a supported portion, such as a shaft and an engagement portion, which is movably or rotatably supported at front and rear frame side portions of the rectangular support frame at the front and rear ends. A sewing frame drive mechanism includes a support mechanism for supporting the front and rear ends of the sewing frame movably at the front and rear frame side portions of the support frame which is movable in the longitudinal direction but not movable in the lateral direction. The sewing frame drive unit includes left and right protruding portions to the left and right of recess portions of a table, and a front hanging preventive mechanism formed of left and right frame side portions of the support frame movably disposed on the left and right protruding portions in the longitudinal direction.
    Type: Grant
    Filed: May 1, 2007
    Date of Patent: September 8, 2009
    Assignee: Kabushikikaisha Barudan
    Inventors: Akira Nakatsu, Keisuke Kasugai
  • Publication number: 20080110384
    Abstract: A sewing frame for extending and holding a sewing cloth is provided with a supported portion, such as a shaft and an engagement portion, which is movably or rotatably supported at front and rear frame side portions of the rectangular support frame at the front and rear ends. A sewing frame drive mechanism includes a support mechanism for supporting the front and rear ends of the sewing frame movably at the front and rear frame side portions of the support frame which is movable in the longitudinal direction but not movable in the lateral direction. The sewing frame drive unit includes left and right protruding portions to the left and right of recess portions of a table, and a front hanging preventive mechanism formed of left and right frame side portions of the support frame movably disposed on the left and right protruding portions in the longitudinal direction.
    Type: Application
    Filed: May 1, 2007
    Publication date: May 15, 2008
    Applicant: KABUSHIKIKAISHA BARUDAN
    Inventors: Akira Nakatsu, Keisuke Kasugai