Patents by Inventor Toshiaki Masuda

Toshiaki Masuda 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: 20220242123
    Abstract: A liquid discharge head having a nozzle substrate including a nozzle from which a liquid is discharged in a liquid discharge direction, a pressure chamber communicating with the nozzle, a diaphragm defining a part of wall of the pressure chamber, and a pressure generator on a first surface of the diaphragm opposite to a second surface of the diaphragm facing the pressure chamber, the pressure generator configured to deform the diaphragm. A gap between a first line and a second line is 40 ?m or less in a direction perpendicular to the liquid discharge direction, where the first line extends, in the liquid discharge direction, from a displacement center at which the diaphragm deforms with a maximum displacement amount, and the second line extends from a central position of the nozzle in the liquid discharge direction.
    Type: Application
    Filed: January 4, 2022
    Publication date: August 4, 2022
    Inventors: Takuma HIRABAYASHI, Hiromichi HIRANO, Ryohta YONETA, Toshiaki MASUDA
  • Patent number: 11355693
    Abstract: An electromechanical transducer includes an electromechanical transducer film of laminated layers including a perovskite-type complex oxide represented by a general formula of ABO3; and a pair of electrodes opposed to each other with the electromechanical transducer film interposed between the pair of electrodes. In the general formula of ABO3, A includes Pb and B includes Zr and Ti.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: June 7, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventors: Naoya Kondo, Satoshi Mizukami, Toshiaki Masuda
  • Patent number: 11292254
    Abstract: A liquid discharge head includes a nozzle configured to discharge a liquid, a pressure chamber communicating with the nozzle, a pressure generator configured to apply pressure on the pressure chamber, a first substrate including a terminal electrode connected to the pressure generator, and a second substrate including a bonding surface bonded to the first substrate, the second substrate including a terminal opening exposing the terminal electrode of the first substrate. The first substrate includes a through hole penetrating through the first substrate, and the second substrate includes a communication hole communicating with the through hole of the first substrate and an air communication channel on a surface opposite to the bonding surface, the air communication channel communicating with the terminal opening and the communicating hole.
    Type: Grant
    Filed: November 13, 2020
    Date of Patent: April 5, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventors: Keishi Miwa, Takahiko Kuroda, Toshiaki Masuda
  • Publication number: 20220097373
    Abstract: An actuator includes a substrate, a diaphragm over the substrate, a lower electrode over the diaphragm, a lead titanate (PbTiO3) layer over the lower electrode, a piezoelectric body over the PbTiO3 layer, and an upper electrode over the piezoelectric body. The piezoelectric body comprises particles of lead zirconate titanate (PZT). An average diameter of the particles of the PZT is 40 nm or more. The average diameter is measured by capturing an electron backscatter diffraction image of the piezoelectric body in an image area of 20 ?m 20 ?m, fitting each of the particles in the image area, and determining an average value of diameters of the circles.
    Type: Application
    Filed: September 21, 2021
    Publication date: March 31, 2022
    Inventor: Toshiaki MASUDA
  • Publication number: 20210301129
    Abstract: The present invention provides a poly(phenylene ether) which retains low-dielectric characteristics and is soluble in various solvents. The poly(phenylene ether) is characterized by being obtained from one or more raw-material phenols including a phenol satisfying at least Requirement 1 (to have hydrogen atoms in the ortho and para positions) and by having a slope calculated from a conformational plot of less than 0.6.
    Type: Application
    Filed: July 17, 2019
    Publication date: September 30, 2021
    Applicant: TAIYO HOLDINGS CO., LTD.
    Inventors: Mami NOSAKA, Satoko MATSUMURA, Nobuhiro ISHIKAWA, Toshiaki MASUDA
  • Patent number: 11130335
    Abstract: A piezoelectric thin-film element includes a diaphragm plate on a substrate; a lower electrode on the diaphragm plate; a piezoelectric film on the lower electrode, the piezoelectric film containing Pb; and an upper electrode on the piezoelectric film. The diaphragm plate is a laminate in which a silicon oxide layer, a silicon nitride layer, and an amorphous layer containing a metal oxide to trap Pb of the piezoelectric film are laminated in turn on the substrate. The amorphous layer has a thickness of preventing Pb of the piezoelectric film from reaching the silicon nitride layer.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: September 28, 2021
    Assignee: RICOH COMPANY, LTD.
    Inventors: Toshiaki Masuda, Keishi Miwa, Takahiko Kuroda
  • Publication number: 20210252862
    Abstract: An actuator includes a substrate, a diaphragm on the substrate, a lower electrode on the diaphragm, a piezoelectric body on the lower electrode, and an upper electrode on the piezoelectric body. A ratio of lead (Pb) and zirconium (Zr) in atomic percent (atm %) present at a grain boundary in the piezoelectric body satisfies a relation of Pb/Zr>1.7.
    Type: Application
    Filed: February 12, 2021
    Publication date: August 19, 2021
    Inventor: Toshiaki MASUDA
  • Publication number: 20210162759
    Abstract: A liquid discharge head includes a nozzle configured to discharge a liquid, a pressure chamber communicating with the nozzle, a pressure generator configured to apply pressure on the pressure chamber, a first substrate including a terminal electrode connected to the pressure generator, and a second substrate including a bonding surface bonded to the first substrate, the second substrate including a terminal opening exposing the terminal electrode of the first substrate. The first substrate includes a through hole penetrating through the first substrate, and the second substrate includes a communication hole communicating with the through hole of the first substrate and an air communication channel on a surface opposite to the bonding surface, the air communication channel communicating with the terminal opening and the communicating hole.
    Type: Application
    Filed: November 13, 2020
    Publication date: June 3, 2021
    Inventors: Keishi MIWA, Takahiko KURODA, Toshiaki MASUDA
  • Publication number: 20210039393
    Abstract: A piezoelectric element includes an upper electrode, a lower electrode, and a piezoelectric body disposed between the upper electrode and the lower electrode. The piezoelectic body contains lead zirconate titanate. The piezoelectric element also includes a seed layer containing lead disposed between the lower electrode and the piezoelectric body. The seed layer has an amorphous structure at least over an entire surface layer portion on the piezoelectric body side.
    Type: Application
    Filed: July 24, 2020
    Publication date: February 11, 2021
    Inventors: Satoshi MIZUKAMI, Masahiro HAYASHI, Toshiaki MASUDA
  • Publication number: 20200298570
    Abstract: A piezoelectric thin-film element includes a diaphragm plate on a substrate; a lower electrode on the diaphragm plate; a piezoelectric film on the lower electrode, the piezoelectric film containing Pb; and an upper electrode on the piezoelectric film. The diaphragm plate is a laminate in which a silicon oxide layer, a silicon nitride layer, and an amorphous layer containing a metal oxide to trap Pb of the piezoelectric film are laminated in turn on the substrate. The amorphous layer has a thickness of preventing Pb of the piezoelectric film from reaching the silicon nitride layer.
    Type: Application
    Filed: March 11, 2020
    Publication date: September 24, 2020
    Inventors: Toshiaki MASUDA, Keishi MIWA, Takahiko KURODA
  • Patent number: 10759175
    Abstract: A liquid discharge head includes a plurality of nozzles to discharge a liquid, a plurality of pressure chambers communicating with the plurality of nozzles, respectively, a plurality of individual supply channels communicating with the plurality of pressure chambers, respectively, a plurality of common-supply branch channels each having a side face and a bottom face and communicating with two or more of the plurality of individual supply channels, respectively, and a common-supply main channel communicating with the plurality of common-supply branch channels. The plurality of common-supply branch channels includes a curved portion on a corner between the side face and the bottom face of each of the plurality of common-supply branch channels along a direction of liquid flow in the plurality of common-supply branch channels.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: September 1, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Toshiaki Masuda, Tsutoh Aoyama, Takahiko Kuroda, Masaki Kato
  • Patent number: 10646123
    Abstract: A blood circuit having a pressure measurement portion connected to a pressure measurement device includes: a first measurement portion provided downstream of a pumping segment; and a second measurement portion provided upstream of the pumping segment. The first measurement portion includes: a first housing having a tubular shape; and a first flexible membrane having a tubular shape and provided in the first housing. The second measurement portion includes: a second housing having a tubular shape; and a second flexible membrane having a tubular shape and provided in the second housing. A space between the first flexible membrane and the first housing is larger than a space between the second flexible membrane and the second housing in an initial state before permitting the blood to flow.
    Type: Grant
    Filed: October 28, 2015
    Date of Patent: May 12, 2020
    Assignee: NIPRO CORPORATION
    Inventors: Toshiaki Masuda, Takeshi Yamaguchi
  • Patent number: 10556431
    Abstract: An electromechanical transducer element including a lower electrode, an electromechanical transducer film and an upper electrode formed on the electromechanical transducer film.
    Type: Grant
    Filed: June 22, 2018
    Date of Patent: February 11, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Satoshi Mizukami, Naoya Kondo, Toshiaki Masuda
  • Publication number: 20190270310
    Abstract: A liquid discharge head includes a plurality of nozzles to discharge a liquid, a plurality of pressure chambers communicating with the plurality of nozzles, respectively, a plurality of individual supply channels communicating with the plurality of pressure chambers, respectively, a plurality of common-supply branch channels each having a side face and a bottom face and communicating with two or more of the plurality of individual supply channels, respectively, and a common-supply main channel communicating with the plurality of common-supply branch channels. The plurality of common-supply branch channels includes a curved portion on a corner between the side face and the bottom face of each of the plurality of common-supply branch channels along a direction of liquid flow in the plurality of common-supply branch channels.
    Type: Application
    Filed: February 19, 2019
    Publication date: September 5, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Toshiaki MASUDA, Tsutoh AOYAMA, Takahiko KURODA, Masaki KATO
  • Publication number: 20190044055
    Abstract: An electromechanical transducer includes an electromechanical transducer film of laminated layers including a perovskite-type complex oxide represented by a general formula of ABO3; and a pair of electrodes opposed to each other with the electromechanical transducer film interposed between the pair of electrodes. In the general formula of ABO3, A includes Pb and B includes Zr and Ti.
    Type: Application
    Filed: July 27, 2018
    Publication date: February 7, 2019
    Inventors: Naoya KONDO, Satoshi MIZUKAMI, Toshiaki MASUDA
  • Publication number: 20180370237
    Abstract: An electromechanical transducer element including a lower electrode, an electromechanical transducer film and an upper electrode formed on the electromechanical transducer film.
    Type: Application
    Filed: June 22, 2018
    Publication date: December 27, 2018
    Inventors: Satoshi Mizukami, Naoya Kondo, Toshiaki Masuda
  • Patent number: 10137234
    Abstract: The invention provides a method for sterilizing a blood purifier, as well as a blood purifier package. The method is effective to decrease the amounts of extracts from the blood purifier attributed to the deterioration of the selectively permeable separation membranes with time during and after exposure to a radioactive ray or an electron ray, and is highly reliable in safety when employed for hemocatharsis therapy. The method for sterilizing a blood purifier which comprises substantially dried selectively permeable separation membranes as a main component, by way of the exposure of the same blood purifier to a radioactive ray and/or an electron ray, is characterized in that the blood purifier is sealed in a packaging bag, together with an oxygen scavenger and a humectant or together with an oxygen scavenger capable of releasing a moisture, and is then sterilized in such a sealed state by the above exposure.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: November 27, 2018
    Assignee: NIPRO CORPORATION
    Inventors: Kimihiro Mabuchi, Noriko Monden, Noriaki Kato, Yuuki Hatakeyama, Takashi Sunohara, Toshiaki Masuda
  • Patent number: 10124585
    Abstract: A liquid discharge head includes an actuator substrate and a holding substrate. The actuator substrate includes a plurality of individual liquid chambers and a plurality of pressure generating elements. The plurality of individual liquid chambers is communicated with a plurality of nozzles to discharge liquid. The plurality of pressure generating elements is arrayed to pressurize liquid in the plurality of individual liquid chambers. The holding substrate includes a plurality of recessed portions to accommodate the plurality of pressure generating elements. The holding substrate is bonded to the actuator substrate with an adhesive. The holding substrate has a plurality of openings as a plurality of channels communicating the plurality of individual liquid chambers with a common liquid chamber to supply liquid to the plurality of individual liquid chambers. At least one corner of each of the plurality of openings at least partially has a curved surface.
    Type: Grant
    Filed: September 19, 2016
    Date of Patent: November 13, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Toshiaki Masuda, Keisuke Hayashi, Keishi Miwa
  • Patent number: 9987409
    Abstract: The invention provides a blood purifier which shows a decreased amount of hydrogen peroxide extracted from its selectively permeable separation membranes, and thus is highly reliable in its safety in use for hemecatharysis. The blood purifier comprises selectively permeable separation membranes as a main component and is characterized in that the amount of hydrogen peroxide which is extracted from the selectively permeable separation membrane removed from the blood purifier after 3 months or longer has passed since the sterilization of the blood purifier by exposure to a radioactive ray and/or an electron ray is not larger than 10 ppm.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: June 5, 2018
    Assignee: NIPRO CORPORATION
    Inventors: Kimihiro Mabuchi, Noriko Monden, Noriaki Kato, Yuuki Hatakeyama, Takashi Sunohara, Toshiaki Masuda
  • Patent number: 9987408
    Abstract: Objects of the invention are to provide a blood purifier package which shows a less increase in the amounts of extracts from the materials of its blood purifier, particularly of its selective permeable separation membranes, attributed to the deterioration of the same materials with time after exposure to a radioactive ray or an electron ray, and which is therefore highly reliable in safety in use for hemocatharsis, and to provide a process for manufacturing the same. The present invention relates to a blood purifier package obtained by packing a blood purifier which comprises selectively permeable separation membranes as a main component, and this blood purifier package is characterized in that the blood purifier is packed and sealed together with an oxygen scavenger in a packaging material capable of shutting out an external air and a water vapor, under a condition of a relative humidity of above 40% RH at 25° C.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: June 5, 2018
    Assignee: NIPRO CORPORATION
    Inventors: Kimihiro Mabuchi, Noriko Monden, Noriaki Kato, Yuuki Hatakeyama, Takashi Sunohara, Toshiaki Masuda