Patents by Inventor Tsutomu Shigenaga
Tsutomu Shigenaga 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: 11931769Abstract: A method of applying heat shield material to form a heat shield layer on a crown surface of a piston of an engine is provided. The method includes the steps of disposing a dispenser that linearly discharges the heat shield material toward the crown surface, and moving an applied position of the heat shield material with respect to the crown surface in a circumferential direction of the crown surface, while discharging the heat shield material from the dispenser toward the crown surface.Type: GrantFiled: August 26, 2022Date of Patent: March 19, 2024Assignee: Mazda Motor CorporationInventors: Ken Sakamoto, Masaya Minato, Tsutomu Shigenaga, Chiaki Asano
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Patent number: 11913871Abstract: A physical property evaluation method is the method for evaluating physical properties of a film-shaped measurement target object by means of an electrochemical method, the method including the step of causing an electrolytic solution to contact a front surface of the measurement target object. The speed of penetration of the electrolytic solution into the measurement target object is adjusted in such a manner that the levels of the front-side temperature and the back-side temperature of the measurement target object and a difference between the front-side temperature and the back-side temperature of the measurement target object are adjusted.Type: GrantFiled: March 6, 2020Date of Patent: February 27, 2024Assignee: MAZDA MOTOR CORPORATIONInventors: Teruaki Asada, Tatsuya Ezaki, Tsutomu Shigenaga, Akihide Takami
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Patent number: 11860081Abstract: A corrosion resistance test method for a coated metal material that includes a metal base and a surface treatment film, includes the steps of: disposing one or more water-containing material holders each holding a water-containing material to be in contact with the surface treatment film and one or more electrodes to be in contact with the water-containing material, and electrically connecting, with an external circuit, between the one electrode and the metal base, or between the electrodes; and supplying a current between the one electrode and the metal base, or between at least one of the electrodes and at least one of the other electrodes, as an anode and a cathode, to bring corrosion of the coated metal material to progress. The water-containing material comprises water, an electrolyte material, and kaolinite, and comprises the kaolinite at 36.0 mass % or more to 45.0 mass % or less.Type: GrantFiled: September 21, 2021Date of Patent: January 2, 2024Assignee: MAZDA MOTOR CORPORATIONInventors: Teruaki Asada, Katsunobu Sasaki, Tatsuya Ezaki, Tsutomu Shigenaga, Akihide Takami
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Patent number: 11821832Abstract: An anticorrosion test method for a coated metallic material may include: a preparation step of adding an artificial flaw at two positions of the coated metallic material; a first measurement step of measuring a size of the artificial flaw; a connection step of electrically connecting the artificial flaws at the two positions by an external circuit via water-containing materials; an energization step of energizing a steel sheet to produce a bulge of an electrodeposition coating film; a second measurement step of measuring size of the bulge of the electrodeposition coating film; a calculation step of calculating a degree of progress of corrosion of the coated metallic material; and a correction step of correcting the degree of the progress of the corrosion.Type: GrantFiled: March 12, 2021Date of Patent: November 21, 2023Assignee: MAZDA MOTOR CORPORATIONInventors: Teruaki Asada, Katsunobu Sasaki, Tsutomu Shigenaga
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Patent number: 11802828Abstract: A corrosion resistance test method for a coated metal material that includes a metal base and a surface treatment film, includes the steps of: disposing one or more water-containing material holders each holding a water-containing material to be in contact with the surface treatment film and one or more electrodes to be in contact with the water-containing material, and electrically connecting, with an external circuit, between the one electrode and the metal base, or between the electrodes; and supplying a current between the one electrode and the metal base, or between at least one of the electrodes and at least one of the other electrodes, as an anode and a cathode, to bring corrosion of the coated metal material to progress. The water-containing material has a viscosity at 65° C. of 10 mPa·s or more to 40 mPa·s or less.Type: GrantFiled: September 21, 2021Date of Patent: October 31, 2023Assignee: MAZDA MOTOR CORPORATIONInventors: Teruaki Asada, Katsunobu Sasaki, Tatsuya Ezaki, Tsutomu Shigenaga, Akihide Takami
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Patent number: 11709127Abstract: Provided is a measurement method for measuring a size of expansion of a surface treatment film occurred in a coated metal material that includes a metal base and the surface treatment film provided on the metal base. The measurement method includes the steps of disposing a water-containing material to be in contact with the expansion and an electrode to be in contact with the water-containing material, and electrically connecting between the electrode and the metal base with an external circuit; applying, with the external circuit, a constant voltage between the electrode and the metal base, as a cathode and an anode, respectively, and measuring a current value flowing therebetween; and calculating a size of the expansion, based on the current value measured and a correlation between the current value and the size of the expansion, the correlation being determined on an exploratory basis in advance.Type: GrantFiled: June 14, 2021Date of Patent: July 25, 2023Assignee: MAZDA MOTOR CORPORATIONInventors: Teruaki Asada, Katsunobu Sasaki, Tsutomu Shigenaga
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Patent number: 11680174Abstract: A coating composition for forming a coating film including particles and a resin binder is so configured that a content of the particles in the coating film is more than 30 vol%, the coating composition includes the particles, a raw resin of the resin binder, and a solvent, and a ratio V/D is 2.5 or less, where V is a volatilization rate (g/m2·s) of the solvent, and D is a diffusion coefficient (10?9 m2/s) of the solvent in the coating composition.Type: GrantFiled: January 5, 2023Date of Patent: June 20, 2023Assignee: MAZDA MOTOR CORPORATIONInventors: Yuki Nakanishi, Hiroyuki Koga, Ken Sakamoto, Masaya Minato, Tsutomu Shigenaga
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Publication number: 20230108997Abstract: A corrosion-resistance testing method for a coated metal member formed of a metallic substrate provided with a surface treatment coating includes an electrification step for applying a voltage and/or a current between a surface of the surface treatment coating and the metallic substrate in a state where a corrosion factor is in contact with the surface of the surface treatment coating so as to measure a temporal change in a current and/or a voltage occurring between the surface of the surface treatment coating and the metallic substrate, and an evaluation step for evaluating a defect occurrence status of the surface treatment coating based on a waveform of the temporal change.Type: ApplicationFiled: September 14, 2022Publication date: April 6, 2023Applicant: MAZDA MOTOR CORPORATIONInventors: Teruaki ASADA, Katsunobu SASAKI, Tatsuya EZAKI, Tsutomu SHIGENAGA, Akihide TAKAMI
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Publication number: 20230104534Abstract: A method of applying to a crown surface of a piston, a heat shield material for forming a heat shield layer, is provided. The method includes masking the piston with a masking member, the masking member including a first part that covers at least part of a side surface of the piston with a first clearance between the side surface and the first part, and a second part that covers an outer circumferential part of the crown surface with a second clearance between the outer circumferential part and the second part, and applying the heat shield material, while the piston is masked.Type: ApplicationFiled: August 31, 2022Publication date: April 6, 2023Inventors: Masaya Minato, Ken Sakamoto, Chiaki Asano, Tsutomu Shigenaga
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Publication number: 20230108474Abstract: A corrosion-resistance testing method for a coated metal member formed of a metallic substrate provided with a surface treatment coating includes an electrification step for applying a voltage and/or a current between a surface of the surface treatment coating and the metallic substrate while a corrosion factor is in contact with the surface of the surface treatment coating so as to measure a temporal change in a current and/or a voltage occurring between the surface of the surface treatment coating and the metallic substrate, and an evaluation step for evaluating a coating quality of the surface treatment coating based on at least one of a gradient of the temporal change when a value of the current and/or the voltage exceeds a predetermined value, an integrated value of the value of the current and/or the voltage within a predetermined time range, and a time average value of the integrated value.Type: ApplicationFiled: September 14, 2022Publication date: April 6, 2023Applicant: MAZDA MOTOR CORPORATIONInventors: Teruaki ASADA, Katsunobu SASAKI, Tatsuya EZAKI, Tsutomu SHIGENAGA, Akihide TAKAMI
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Publication number: 20230099537Abstract: A method of applying heat shield material to form a heat shield layer on a crown surface of a piston of an engine is provided. The method includes the steps of disposing a dispenser that linearly discharges the heat shield material toward the crown surface, and moving an applied position of the heat shield material with respect to the crown surface in a circumferential direction of the crown surface, while discharging the heat shield material from the dispenser toward the crown surface.Type: ApplicationFiled: August 26, 2022Publication date: March 30, 2023Inventors: Ken Sakamoto, Masaya Minato, Tsutomu Shigenaga, Chiaki Asano
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Patent number: 11566996Abstract: A corrosion resistance tester for a coated metal material including a surface treatment film on a metal substrate includes: a container placed on the surface treatment film, and having a bottom surface in contact with the surface treatment film, the container including a plurality of water-containing electrolyte material holders that open through the bottom surface; the water-containing electrolyte material contained in each of the water-containing electrolyte material holders of the container, and being in contact with an associated one of a plurality of separate measurement target portions of the surface treatment film; a plurality of electrodes being each in contact with the water-containing electrolyte material contained in an associated one of the water-containing electrolyte material holders; an external circuit connecting the electrodes together; and a conduction means configured to conduct electricity to the metal substrate through the electrodes and the external circuit.Type: GrantFiled: December 30, 2019Date of Patent: January 31, 2023Assignee: MAZDA MOTOR CORPORATIONInventors: Teruaki Asada, Katsunobu Sasaki, Tsutomu Shigenaga
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Patent number: 11519844Abstract: The method for a corrosion resistance test of a coated metal material is an electrochemical method simulating corrosion proceeded by damaged portions in the surface treatment film 4. Two artificially damaged portions 5 spaced from each other in a coated metal material 1 that is obtained by providing a surface treatment film 4 on a metal base 2 are electrically connected to each other by an external circuit 11 via an aqueous electrolyte material 6, and corrosion proceeds by supplying current using one of the artificially damaged portions 5 as an anode site and the other as a cathode site.Type: GrantFiled: July 30, 2018Date of Patent: December 6, 2022Assignee: MAZDA MOTOR CORPORATIONInventors: Teruaki Asada, Tsutomu Shigenaga
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Publication number: 20220099557Abstract: A corrosion resistance test method for a coated metal material that includes a metal base and a surface treatment film, includes the steps of: disposing one or more water-containing material holders each holding a water-containing material to be in contact with the surface treatment film and one or more electrodes to be in contact with the water-containing material, and electrically connecting, with an external circuit, between the one electrode and the metal base, or between the electrodes; and supplying a current between the one electrode and the metal base, or between at least one of the electrodes and at least one of the other electrodes, as an anode and a cathode, to bring corrosion of the coated metal material to progress. The water-containing material has a viscosity at 65° C. of 10 mPa·s or more to 40 mPa·s or less.Type: ApplicationFiled: September 21, 2021Publication date: March 31, 2022Applicant: MAZDA MOTOR CORPORATIONInventors: Teruaki ASADA, Katsunobu SASAKI, Tatsuya EZAKI, Tsutomu SHIGENAGA, Akihide TAKAMI
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Publication number: 20220099556Abstract: A corrosion resistance test method for a coated metal material that includes a metal base and a surface treatment film, includes the steps of: disposing one or more water-containing material holders each holding a water-containing material to be in contact with the surface treatment film and one or more electrodes to be in contact with the water-containing material, and electrically connecting, with an external circuit, between the one electrode and the metal base, or between the electrodes; and supplying a current between the one electrode and the metal base, or between at least one of the electrodes and at least one of the other electrodes, as an anode and a cathode, to bring corrosion of the coated metal material to progress. The water-containing material comprises water, an electrolyte material, and kaolinite, and comprises the kaolinite at 36.0 mass % or more to 45.0 mass % or less.Type: ApplicationFiled: September 21, 2021Publication date: March 31, 2022Applicant: MAZDA MOTOR CORPORATIONInventors: Teruaki ASADA, Katsunobu SASAKI, Tatsuya EZAKI, Tsutomu SHIGENAGA, Akihide TAKAMI
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Patent number: 11262329Abstract: Disclosed herein is a method of testing a corrosion resistance of a coated metal material including a surface treatment film on a metal substrate. The method includes: treatment of interposing a water-containing electrolyte material containing water, a supporting electrolyte, and a water penetration enhancer, between a surface of the surface treatment film of the coated metal material and an electrode; holding of the water-containing electrolyte material on the surface of the surface treatment film for one minute to one day; and electrical conduction from the electrode through the water-containing electrolyte material to the coated metal material.Type: GrantFiled: December 2, 2019Date of Patent: March 1, 2022Assignee: MAZDA MOTOR CORPORATIONInventors: Teruaki Asada, Tsutomu Shigenaga
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Publication number: 20220034786Abstract: A corrosion resistance test apparatus is for a coated metal material including a metal base and a surface treatment film, and includes: one or two water-containing material holders to hold a water-containing material in contact with the surface treatment film inside; one or two electrodes in contact with the water-containing material; an external circuit configured to electrically connect between the electrode and the metal base, or between the electrodes; a temperature control element brought into contact with the coated metal material via an insulating portion and configured to control a temperature of at least the coated metal material; a temperature controller configured to control a temperature of the temperature control element; and a current supplier configured to supply a current between the electrode and the metal base, or between the electrodes, as an anode and a cathode, respectively to bring corrosion of the coated metal material to progress.Type: ApplicationFiled: July 13, 2021Publication date: February 3, 2022Applicant: MAZDA MOTOR CORPORATIONInventors: Teruaki ASADA, Katsunobu SASAKI, Tsutomu SHIGENAGA
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Publication number: 20210396648Abstract: Provided is a measurement method for measuring a size of expansion of a surface treatment film occurred in a coated metal material that includes a metal base and the surface treatment film provided on the metal base. The measurement method includes the steps of disposing a water-containing material to be in contact with the expansion and an electrode to be in contact with the water-containing material, and electrically connecting between the electrode and the metal base with an external circuit; applying, with the external circuit, a constant voltage between the electrode and the metal base, as a cathode and an anode, respectively, and measuring a current value flowing therebetween; and calculating a size of the expansion, based on the current value measured and a correlation between the current value and the size of the expansion, the correlation being determined on an exploratory basis in advance.Type: ApplicationFiled: June 14, 2021Publication date: December 23, 2021Applicant: MAZDA MOTOR CORPORATIONInventors: Teruaki ASADA, Katsunobu SASAKI, Tsutomu SHIGENAGA
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Publication number: 20210396650Abstract: An electrode portion device is for use in a corrosion resistance test for a coated metal material that includes a metal base and a surface treatment film on the metal base material. The electrode portion device includes: a container body that is tubular and disposed on the surface treatment film, and configured to hold a water-containing material that is in contact with the surface treatment film inside; a lid for closing an upper opening of the container body; a through hole provided in an upper side wall of the container body; and an electrode in contact with the water-containing material contained inside the container body.Type: ApplicationFiled: June 14, 2021Publication date: December 23, 2021Applicant: MAZDA MOTOR CORPORATIONInventors: Teruaki ASADA, Katsunobu SASAKI, Tsutomu SHIGENAGA
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Publication number: 20210396649Abstract: Provided is a measurement method for measuring a size of a damaged portion in a coated metal material that includes a metal base and surface treatment film provided on the metal base, and reaching the metal base through the surface treatment film. The measurement method includes the steps of disposing a water-containing material to be in contact with the damaged portion and an electrode to be in contact with the water-containing material, and electrically connecting between the electrode and the metal base with an external circuit; applying, with the external circuit, a constant voltage between the electrode and the metal base, as a cathode and an anode, respectively, and measuring a current value flowing therebetween; and calculating a size of the damaged portion, based on the current value measured and a correlation between the current value and the size of the damaged portion, determined on an exploratory basis in advance.Type: ApplicationFiled: June 14, 2021Publication date: December 23, 2021Applicant: MAZDA MOTOR CORPORATIONInventors: Teruaki ASADA, Katsunobu SASAKI, Tsutomu SHIGENAGA