Patents by Inventor Koichi Maruyama

Koichi Maruyama 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: 20210246990
    Abstract: A valve device includes: a housing having a cylindrical internal peripheral wall; a fluid introduction path communicating with a space in the internal peripheral wall; a fluid discharge path communicating with the space in the internal peripheral wall; a valve element having a communication path bringing the fluid introduction and fluid discharge paths into communication with each other, and having a major radial portion formed with a predetermined first internal radius associated with an internal radius of the internal peripheral wall of the housing, a minor radial portion formed with a second internal radius, and an intermediate portion formed to join the major and minor radial portions together; a valve element rotation mechanism rotating the valve element inside the space; a seal member being able to contact the valve element rotating inside the space; and a shaft inserted in the space through a through-hole formed in the housing.
    Type: Application
    Filed: February 9, 2021
    Publication date: August 12, 2021
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Koichi MARUYAMA, Masafumi YOSHIDA, Naoki EMORI, Naoto YUMISASHI
  • Publication number: 20200158258
    Abstract: An opening and closing valve includes: a housing that has an internal space formed to have a posture along an axis and has inflow and outflow ports communicating with each other via the internal space; a valve body that is switchable between a closed position where flow of a fluid between the inflow and outflow ports is blocked and an open position where the flow of the fluid between the inflow and outflow ports is allowed, by being operated in the internal space along the axis; a direct current motor that operates the valve body in a direction along the axis; and a damper unit that decreases a moving speed of the valve body immediately before the valve body reaches at least one of the open and closed positions by a drive force of the direct current motor.
    Type: Application
    Filed: November 19, 2019
    Publication date: May 21, 2020
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Koichi MARUYAMA, Naoto YUMISASHI, Masafumi YOSHIDA, Hideyuki SUZUKI
  • Patent number: 10514103
    Abstract: A refrigerant control valve apparatus which maintains improved sealing ability while being restrained from being enlarged includes a housing including a first discharge port and a second discharge port which includes a smaller diameter than the first discharge port, a rotor rotatably housed at the housing, a bore portion provided at an outer wall portion of the rotor to control a flow of refrigerant relative to the first discharge port and the second discharge port, a second seal portion of the second discharge port being configured to make contact with an edge portion of the bore portion in a case where the rotor is specified at any rotation position for sending out the refrigerant to the second discharge port.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: December 24, 2019
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Naoto Yumisashi, Koichi Maruyama, Yojiro Koga, Hideyuki Suzuki, Masanobu Matsusaka
  • Patent number: 10513968
    Abstract: A refrigerant control valve apparatus includes a valve body accommodated inside a valve housing, the valve housing being formed with an inlet port and a discharge port. A seal mechanism includes a seal body and a biasing mechanism. The seal mechanism is provided with a first pressure receiving surface receiving pressure of the refrigerant, which acts in a direction same as a biasing direction of the biasing mechanism, and a second pressure receiving surface receiving pressure of the refrigerant, which acts in a direction opposite to the biasing direction of the biasing mechanism. The first pressure receiving surface and the second first pressure receiving surface are formed to include an equal area to each other, and the seal mechanism is accommodated within a seal accommodation space such that pressure of the refrigerant from the inlet port acts on the first pressure receiving surface and the second pressure receiving surface.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: December 24, 2019
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Naoto Yumisashi, Koichi Maruyama
  • Patent number: 10513966
    Abstract: A refrigerant control valve device includes: a spherical rotor having an opening and rotating about a rotation axis; a housing including at least one circumferential port, and an axial port, the housing allowing a refrigerant to flow therein and the rotor being accommodated in the housing; at least one hole formed in the rotor and allowing the internal space of the rotor and the circumferential port to communicate with each other when the rotor rotates; a ring-shaped seal member installed coaxially with the circumferential port; a biasing member applying a biasing force to the seal member; a packing body provided between the housing and an outer diameter portion of the seal member; and a fixing member holding the packing body with the housing in a direction in which the circumferential port extends.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: December 24, 2019
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Hideyuki Suzuki, Masanobu Matsusaka, Yojiro Koga, Naoto Yumisashi, Koichi Maruyama
  • Patent number: 10072556
    Abstract: A refrigerant control valve apparatus includes a valve body provided with a main control valve controlling the refrigerant sent to a discharge port and a temperature sensing control valve controlling supply and discharge of the refrigerant to a temperature sensing chamber. A fail-safe mechanism is provided which supplies the refrigerant to the discharge port in a case where the temperature of the refrigerant exceeds a set value. The temperature sensing control valve is set in an open posture in a case where the main control valve is in a closed posture that closes the discharge port and the temperature sensing control valve is set in a closed posture in a case where the main control valve is in an open posture that opens the discharge port.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: September 11, 2018
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Koichi Maruyama, Naoto Yumisashi
  • Publication number: 20180066758
    Abstract: A refrigerant control valve apparatus which maintains improved sealing ability while being restrained from being enlarged includes a housing including a first discharge port and a second discharge port which includes a smaller diameter than the first discharge port, a rotor rotatably housed at the housing, a bore portion provided at an outer wall portion of the rotor to control a flow of refrigerant relative to the first discharge port and the second discharge port, a second seal portion of the second discharge port being configured to make contact with an edge portion of the bore portion in a case where the rotor is specified at any rotation position for sending out the refrigerant to the second discharge port.
    Type: Application
    Filed: December 10, 2015
    Publication date: March 8, 2018
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Naoto YUMISASHI, Koichi MARUYAMA, Yojiro KOGA, Hideyuki SUZUKI, Masanobu MATSUSAKA
  • Publication number: 20170335749
    Abstract: A refrigerant control valve apparatus includes a valve body provided with a main control valve controlling the refrigerant sent to a discharge port and a temperature sensing control valve controlling supply and discharge of the refrigerant to a temperature sensing chamber. A fail-safe mechanism is provided which supplies the refrigerant to the discharge port in a case where the temperature of the refrigerant exceeds a set value. The temperature sensing control valve is set in an open posture in a case where the main control valve is in a closed posture that closes the discharge port and the temperature sensing control valve is set in a closed posture in a case where the main control valve is in an open posture that opens the discharge port.
    Type: Application
    Filed: September 25, 2015
    Publication date: November 23, 2017
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Koichi MARUYAMA, Naoto YUMISASHI
  • Publication number: 20170335750
    Abstract: A refrigerant control valve apparatus includes a valve body accommodated inside a valve housing, the valve housing being formed with an inlet port and a discharge port. A seal mechanism includes a seal body and a biasing mechanism. The seal mechanism is provided with a first pressure receiving surface receiving pressure of the refrigerant, which acts in a direction same as a biasing direction of the biasing mechanism, and a second pressure receiving surface receiving pressure of the refrigerant, which acts in a direction opposite to the biasing direction of the biasing mechanism. The first pressure receiving surface and the second first pressure receiving surface are formed to include an equal area to each other, and the seal mechanism is accommodated within a seal accommodation space such that pressure of the refrigerant from the inlet port acts on the first pressure receiving surface and the second pressure receiving surface.
    Type: Application
    Filed: September 25, 2015
    Publication date: November 23, 2017
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Naoto YUMISASHI, Koichi MARUYAMA
  • Publication number: 20170211460
    Abstract: A refrigerant control valve device includes: a spherical rotor having an opening and rotating about a rotation axis; a housing including at least one circumferential port, and an axial port, the housing allowing a refrigerant to flow therein and the rotor being accommodated in the housing; at least one hole formed in the rotor and allowing the internal space of the rotor and the circumferential port to communicate with each other when the rotor rotates; a ring-shaped seal member installed coaxially with the circumferential port; a biasing member applying a biasing force to the seal member; a packing body provided between the housing and an outer diameter portion of the seal member; and a fixing member holding the packing body with the housing in a direction in which the circumferential port extends.
    Type: Application
    Filed: January 26, 2017
    Publication date: July 27, 2017
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Hideyuki SUZUKI, Masanobu MATSUSAKA, Yojiro KOGA, Naoto YUMISASHI, Koichi MARUYAMA
  • Patent number: 9550441
    Abstract: In this clip for mounting a component, a first plate portion includes first engaging pawls, and a second plate portion second engaging pawls, are linked by a linking-side plate portion in the rear end region on a side having either one of the plate portions, and first and second side plate portions which bend and extend from the first and second plate portions are in contact on the side having the other plate portion. The linking-side plate portion and the first and second side plate portions cut through a gap portion formed as an opening in the rear of the first and second plate portions of the clip, and gap portions formed as openings in both sides.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: January 24, 2017
    Assignees: TOPY FASTENERS, LTD., KUMI KASEI CO., LTD.
    Inventors: Makoto Aoyama, Koichi Maruyama, Yasuo Horiuchi, Naoyasu Asano, Yoshihiko Takeda, Hiroshi Kawai
  • Patent number: 9494156
    Abstract: A pump that includes a pump body 10 which sucks in air from an inlet 7 and discharges the air; a hydraulic pump which pressure-feeds a lubricating oil to the pump body 10 in accordance with the driving of the pump body 10; a non-return valve 70 which is disposed in a valve accommodation portion 6 between the inlet 7 and the pump body 10 to open and close the valve accommodation portion 6; an air introduction path 19 which introduces air into a cylinder 74 of the non-return valve 70; and an air introduction valve 60 which opens the air introduction path 19 when the hydraulic pump is not operating.
    Type: Grant
    Filed: November 25, 2010
    Date of Patent: November 15, 2016
    Assignee: ULVAC KIKO, INC.
    Inventors: Koichi Maruyama, Junichi Aikawa, Naoto Yotsugi, Kotaro Iwagoshi
  • Publication number: 20150183356
    Abstract: In this clip for mounting a component, a first plate portion includes first engaging pawls, and a second plate portion second engaging pawls, are linked by a linking-side plate portion in the rear end region on a side having either one of the plate portions, and first and second side plate portions which bend and extend from the first and second plate portions are in contact on the side having the other plate portion. The linking-side plate portion and the first and second side plate portions cut through a gap portion formed as an opening in the rear of the first and second plate portions of the clip, and gap portions formed as openings in both sides.
    Type: Application
    Filed: July 24, 2012
    Publication date: July 2, 2015
    Applicants: TOPY FASTENERS, LTD., KUMI KASEI CO., LTD.
    Inventors: Makoto Aoyama, Koichi Maruyama, Yasuo Horiuchi, Naoyasu Asano, Yoshihiko Takeda, Hiroshi Kawai
  • Patent number: 8705331
    Abstract: A method of designing an optical element to be used for an optical system in which each of a plurality of light beams having different design wavelengths passes through the optical element is provided. The method includes determining at least two types of optical path difference functions including first and second optical path difference functions in such a manner that proportion, brought by the first optical path difference function, between diffraction orders at which diffraction efficiencies of the plurality of light beams are maximized is different from proportion, brought by the second optical path difference function, between diffraction orders at which diffraction efficiencies of the plurality of light beams are maximized, and obtaining a shape defined by combining the at least two types of optical path difference functions so as to apply the obtained shape to at least one surface of surfaces of the optical element.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: April 22, 2014
    Assignee: Hoya Corporation
    Inventors: Koichi Maruyama, Yoshiyuki Tashiro, Daisuke Koreeda
  • Patent number: 8627239
    Abstract: A mask blank is provided by forming a plurality of films, including at least a thin film to be a transfer pattern, on a board. At the time of patterning a resist film of the mask blank according to pattern data, film information to check with a pattern is obtained for each of a plurality of the films.
    Type: Grant
    Filed: May 4, 2012
    Date of Patent: January 7, 2014
    Assignee: Hoya Corporation
    Inventors: Hiroyuki Ishida, Tamiya Aiyama, Koichi Maruyama
  • Patent number: 8570668
    Abstract: An imaging optical system, which includes an imaging lens group having at least one lens, and an image side prism that bends light which has passed through the imaging lens group toward an image pickup device arranged at a predetermined position, and wherein the image side prism includes a reflection surface which reflects, toward the image pickup device, incident light proceeding from the imaging lens group and an exit surface from which light reflected from the reflection surface emerges, and wherein the image side prism has a cut surface formed by cutting off a vertex portion between the reflection surface and the exit surface such that a whole normal light incident area within which normal light is incident on the reflection surface remains, and the cut surface is a non-diffusing surface.
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: October 29, 2013
    Assignee: Hoya Corporation
    Inventors: Yutaka Takakubo, Eijiroh Tada, Koichi Maruyama
  • Publication number: 20120294740
    Abstract: A pump comprises: a pump body 10 which sucks in air from an inlet 7 and discharges the air; a hydraulic pump which pressure-feeds a lubricating oil to the pump body 10 in accordance with the driving of the pump body 10; a non-return valve 70 which is disposed in a valve accommodation portion 6 between the inlet 7 and the pump body 10 to open and close the valve accommodation portion 6; an air introduction path 19 which introduces air into a cylinder 74 of the non-return valve 70; and an air introduction valve 60 which opens the air introduction path 19 when the hydraulic pump is not operating.
    Type: Application
    Filed: November 25, 2010
    Publication date: November 22, 2012
    Applicant: ULVAC KIKO, Inc.
    Inventors: Koichi Maruyama, Junichi Aikawa, Naoto Yotsugi, Kotaro Iwagoshi
  • Publication number: 20120260222
    Abstract: A mask blank is provided by forming a plurality of films, including at least a thin film to be a transfer pattern, on a board. At the time of patterning a resist film of the mask blank according to pattern data, film information to check with a pattern is obtained for each of a plurality of the films.
    Type: Application
    Filed: May 4, 2012
    Publication date: October 11, 2012
    Applicant: HOYA CORPORATION
    Inventors: Hiroyuki ISHIDA, Tamiya AIYAMA, Koichi MARUYAMA
  • Patent number: 8196070
    Abstract: A mask blank is provided by forming a plurality of films, including at least a thin film to be a transfer pattern, on a board. At the time of patterning a resist film of the mask blank according to pattern data, film information to check with a pattern is obtained for each of a plurality of the films.
    Type: Grant
    Filed: January 11, 2010
    Date of Patent: June 5, 2012
    Assignee: Hoya Corporation
    Inventors: Hiroyuki Ishida, Tamiya Aiyama, Koichi Maruyama
  • Publication number: 20120075726
    Abstract: An imaging optical system, which includes an imaging lens group having at least one lens, and an image side prism that bends light which has passed through the imaging lens group toward an image pickup device arranged at a predetermined position, and wherein the image side prism includes a reflection surface which reflects, toward the image pickup device, incident light proceeding from the imaging lens group and an exit surface from which light reflected from the reflection surface emerges, and wherein the image side prism has a cut surface formed by cutting off a vertex portion between the reflection surface and the exit surface such that a whole normal light incident area within which normal light is incident on the reflection surface remains, and the cut surface is a non-diffusing surface.
    Type: Application
    Filed: September 20, 2011
    Publication date: March 29, 2012
    Applicant: HOYA CORPORATION
    Inventors: Yutaka TAKAKUBO, Eijiroh TADA, Koichi MARUYAMA