Patents by Inventor Masakazu Nagasawa

Masakazu Nagasawa 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).

  • Patent number: 10788093
    Abstract: A vibration-damping device (10) of the present invention includes a first attachment member (11), a second attachment member (12), an elastic body (13), and a partition member (16). In the partition member, a restriction passage (24) through which the first liquid chamber (14) and the second liquid chamber (15) communicate with each other is formed. The restriction passage includes a first communicating portion (26) which opens to the first liquid chamber, a second communicating portion (27) which opens to the second liquid chamber, and a main body flow passage (25) through which the first communicating portion and the second communicating portion communicate with each other. At least one of the first communicating portion and the second communicating portion includes a plurality of fine holes (26a) which are disposed in a flow passage direction of the main body flow passage.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: September 29, 2020
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Akira Ueki, Yuki Satake, Masakazu Nagasawa, Yasuyuki Nagashima, Hideki Sugawara, Shingo Oono
  • Patent number: 10760641
    Abstract: A restricted passageway (24) is provided with a first communication part (26) which is formed in a first barrier wall (34) facing a first liquid chamber and opens to the first liquid chamber, a second communication part (27) which is formed in a second barrier wall (35) facing a second liquid chamber and opens to the second liquid chamber, and a main body flow path (25) that is configured to cause the first communication part (26) and the second communication part (27) to communicate with each other. At least one of the first communication part (26) and the second communication part (27) includes a plurality of fine holes (26a) that pass through the first barrier wall (34) or the second barrier wall (35).
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: September 1, 2020
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Akira Ueki, Yuki Satake, Masakazu Nagasawa, Yasuyuki Nagashima, Hideki Sugawara, Shingo Oono
  • Publication number: 20200122561
    Abstract: An active anti-vibration device 10 includes a pair of elastic connecting parts 20 and 30, a rod body 40 that connects the pair of elastic connecting parts, an inertial mass 52 that is supported by the rod body, a drive part 58 that reciprocates the inertial mass in an axial direction of the rod body, and a controller 90 that is configured to be able to perform acceleration feedback control to control the drive part so that a first force proportional to an axial acceleration of the rod body is generated.
    Type: Application
    Filed: February 13, 2018
    Publication date: April 23, 2020
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Akira UEKI, Masakazu NAGASAWA
  • Publication number: 20200049224
    Abstract: A vibration-damping device (1) of the present invention includes an outer cylinder (11), an inner member (12), an elastic body (13), a partition member (17), an intermediate cylinder (31), and a dividing member (32). The elastic body connects together the outer cylinder and the inner member. The partition member divides a liquid chamber (14) into the outer cylinder into a main liquid chamber (15) and an auxiliary liquid chamber (16). An orifice passage (21) is formed in the partition member. The intermediate cylinder (31) is disposed between the outer cylinder and the inner member and connected to the elastic body. The partition member is connected to the intermediate cylinder and divides the main liquid chamber into a first main liquid chamber (15a) and a second main liquid chamber (15b). An accommodation chamber (37), a first communication hole (37a), and a second communication hole (37b) are formed in the partition member.
    Type: Application
    Filed: January 5, 2018
    Publication date: February 13, 2020
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Akira UEKI, Masakazu NAGASAWA, Yuta BABA
  • Patent number: 10480607
    Abstract: The present invention is a liquid-tight the vibration-damping device (10). In this vibration-damping device (10), a limiting passage (24) includes a main body passage (25) disposed inside a partition member (16), a first communication section (26) configured to communicate the main body passage (25) and a first liquid chamber (14), and a second communication section (27) configured to communicate the main body passage (25) with a second liquid chamber (12). At least one of the first communication section (26) and the second communication section (27) includes openings (31).
    Type: Grant
    Filed: January 25, 2016
    Date of Patent: November 19, 2019
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Masakazu Nagasawa, Akira Ueki, Yasuyuki Nagashima
  • Publication number: 20190275278
    Abstract: A nasal cannula in which a pair of nostril inserts (130) are provided on a base (120) provided at the distal end of a tube (110) such that the nostril inserts (130) communicate with the tube (100). The base (120) and the nostril inserts (130) are integrally formed so as to elastically deform to an appropriate extent. The nostril inserts (130) have an appropriate length. When the nostril inserts (130) are inserted into the right and left nostrils, respectively, of a patient, the nostril inserts (130) hold at least one of the columna nasi and the nasal septum from opposite sides with an appropriate elastic force, whereby the nostril inserts (130) are attached to the nostrils.
    Type: Application
    Filed: March 8, 2019
    Publication date: September 12, 2019
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Kyosuke Nakamura, Masakazu Nagasawa, Kiichi Gondo, Keiko Nii, Masanori Suda
  • Publication number: 20190176605
    Abstract: A vibration-damping device (10) includes a tubular first attachment member (11) that is coupled to any one of a vibration-generating portion and a vibration-receiving portion; a second attachment member (12) that is coupled to the other one of the vibration-generating portion and the vibration-receiving portion; an elastic body (13) that couples both the attachment members (11 and 12) to each other; and a partition member (16) that divides a liquid chamber (19) inside the first attachment member (11) into a main liquid chamber (14) having the elastic body (13) as a part of a wall surface, and a sub-liquid chamber (15). A restriction passage (24) through which the main liquid chamber (14) and the sub-liquid chamber (15) communicate with each other is formed in the partition member (16). The partition member (16) is provided with a flow-speed restraint portion (32) which restrains a flow speed of liquid (L) flowing in the restriction passage (24).
    Type: Application
    Filed: June 22, 2017
    Publication date: June 13, 2019
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Akira UEKI, Yuki SATAKE, Masakazu NAGASAWA, Yasuyuki NAGASHIMA, Hideki SUGAWARA, Shingo OONO
  • Publication number: 20190145488
    Abstract: A vibration-damping device (10) of the present invention includes a first attachment member (11), a second attachment member (12), an elastic body (13), and a partition member (16). In the partition member, a restriction passage (24) through which the first liquid chamber (14) and the second liquid chamber (15) communicate with each other is formed. The restriction passage includes a first communicating portion (26) which opens to the first liquid chamber, a second communicating portion (27) which opens to the second liquid chamber, and a main body flow passage (25) through which the first communicating portion and the second communicating portion communicate with each other. At least one of the first communicating portion and the second communicating portion includes a plurality of fine holes (26a) which are disposed in a flow passage direction of the main body flow passage.
    Type: Application
    Filed: June 16, 2017
    Publication date: May 16, 2019
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Akira UEKI, Yuki SATAKE, Masakazu NAGASAWA, Yasuyuki NAGASHIMA, Hideki SUGAWARA, Shingo OONO
  • Publication number: 20190107171
    Abstract: A restricted passageway (24) is provided with a first communication part (26) which is formed in a first barrier wall (34) facing a first liquid chamber and opens to the first liquid chamber, a second communication part (27) which is formed in a second barrier wall (35) facing a second liquid chamber and opens to the second liquid chamber, and a main body flow path (25) that is configured to cause the first communication part (26) and the second communication part (27) to communicate with each other. At least one of the first communication part (26) and the second communication part (27) includes a plurality of fine holes (26a) that pass through the first barrier wall (34) or the second barrier wall (35).
    Type: Application
    Filed: June 16, 2017
    Publication date: April 11, 2019
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Akira UEKI, Yuki SATAKE, Masakazu NAGASAWA, Yasuyuki NAGASHIMA, Hideki SUGAWARA, Shingo OONO
  • Patent number: 10221916
    Abstract: An anti-vibration apparatus (10) includes a first attachment member (11) having a tubular shape and connected to one of a vibration generating section and a vibration receiving section and a second attachment member (12) connected to the other section, an elastic body (13) configured to connect the attachment members to each other, and a partition member (16) configured to partition a liquid chamber in the first attachment member (11) in which a liquid is sealed into a first liquid chamber (14) and a second liquid chamber (15). At least one of the first liquid chamber (14) and the second liquid chamber (15) has the elastic body (13) at a portion of a wall surface.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: March 5, 2019
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Akira Ueki, Masakazu Nagasawa, Kenichiro Iwasaki
  • Patent number: 10030738
    Abstract: A partitioning member (16) of a vibration-damping device (10) is provided with a communication chamber (30), a first communication hole (31) and a second communication hole (32). The first communication hole (31) and the second communication hole (32) are arranged to be offset from each other in the axial direction (O). The first communication hole (31) is formed by the inside of a first protruding tube (31a) that protrudes into the communication chamber (30) from the first wall surface (30a). The second communication hole (32) is formed by the inside of the second protruding tube (32a) that protrudes into the communication chamber (30) from the second wall surface (30b). By including the configuration as described above, simplification of structure can be achieved.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: July 24, 2018
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Akira Ueki, Masakazu Nagasawa
  • Patent number: 9939038
    Abstract: Swirl chamber units (31) allowing a first liquid chamber (14) and a second liquid chamber (15) to communicate with each other are formed in a partitioning member of a vibration-damping device (10) of the present invention. Each swirl chamber unit (31) includes a first communication hole (32a) opening to the first liquid chamber (14), and a second communication hole (32b) opening to the second liquid chamber (15); a first swirl chamber (33a) communicating with the first liquid chamber (14) via the first communication hole (32a), and a second swirl chamber (33b) communicating with the second liquid chamber (15) via the second communication hole (32b); and a flow regulation passage (34) that allows the first swirl chamber (33a) and the second swirl chamber (33b) to communicate with each other and opens to the swirl chambers (33a, 33b) in circumferential directions of the respective swirl chambers (33a, 33b).
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: April 10, 2018
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Akira Ueki, Shingo Oono, Hirokazu Watai, Masakazu Nagasawa
  • Publication number: 20180073591
    Abstract: The present invention is a liquid-tight the vibration-damping device (10). In this vibration-damping device (10), a limiting passage (24) includes a main body passage (25) disposed inside a partition member (16), a first communication section (26) configured to communicate the main body passage (25) and a first liquid chamber (14), and a second communication section (27) configured to communicate the main body passage (25) with a second liquid chamber (12). At least one of the first communication section (26) and the second communication section (27) includes openings (31).
    Type: Application
    Filed: January 25, 2016
    Publication date: March 15, 2018
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Masakazu NAGASAWA, Akira UEKI, Yasuyuki NAGASHIMA
  • Patent number: 9772002
    Abstract: A vibration isolator (10) is a liquid-enclosed vibration isolator and includes: a tubular first mounting member (11) connected to one of a vibration generator and a vibration absorber, and a second mounting member (12) connected to the other; an elastic body (13) elastically connecting the mounting members; and a partition member (16) partitioning a liquid chamber (19) in the first mounting member (11) within which a liquid (L) is enclosed into a primary liquid chamber (14) that uses the elastic body (13) as a part of a wall surface thereof and a secondary liquid chamber (15), wherein the partition member (16) is formed with a restriction passage (24) communicating the primary and secondary liquid chambers (14, 15) with each other, and a porous body (28) having numerous pores (31), which are disposed in parallel so as to communicate a side of the primary liquid chamber (14) and a side of the secondary liquid chamber (15) with each other, is arranged in the restriction passage (24).
    Type: Grant
    Filed: August 6, 2015
    Date of Patent: September 26, 2017
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Akira Ueki, Masakazu Nagasawa, Shuhei Ono, Yasuyuki Nagashima
  • Patent number: 9759285
    Abstract: A vibration damping device includes a first cylindrical attachment member (11) which is connected to one of a vibration generating portion and a vibration receiving portion, a second attachment member (12) which is connected to the other thereof, an elastic body (13) which connects both attachment members (11 and 12), and a partition member (17) which divides a liquid chamber (14), in which a liquid (L) is sealed and which is positioned within the first attachment member (11), into a primary liquid chamber (15) having the elastic body (13) as a portion of a wall surface, and into a secondary liquid chamber (16). Limiting passages (21 and 22) which communicate with the primary liquid chamber (15) and the secondary liquid chamber (16) are formed in the partition member (17).
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: September 12, 2017
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Akira Ueki, Masakazu Nagasawa
  • Patent number: 9726251
    Abstract: A vibration isolator includes first and second mounting members; an elastic body connecting the mounting members; a partition member partitioning a liquid chamber in the first mounting member into a primary liquid chamber using the elastic body as a part of a wall surface thereof and a secondary liquid chamber; and a movable member housed in a housing chamber provided within the partition member, the movable member being deformable or displaceable in an axial direction of the first mounting member. The partition member includes communicating holes that extend from a portion of the partition member which is exposed to the primary liquid chamber or the secondary liquid chamber toward an inside of the partition member and are opened toward the movable member. The partition member is equipped with partition plate parts dividing the housing chamber from the primary liquid chamber and dividing the housing chamber from the secondary liquid chamber.
    Type: Grant
    Filed: August 12, 2015
    Date of Patent: August 8, 2017
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Masakazu Nagasawa, Akira Ueki, Shuhei Ono, Yasuyuki Nagashima
  • Patent number: 9719576
    Abstract: A vibration isolator includes a partition member (15) that partitions a liquid chamber (16) in a first mounting member (11) into a primary liquid chamber (16a) using an elastic body (13) as a part of a wall surface thereof and a secondary liquid chamber (16b), and a movable member (23) housed in a housing chamber (20) provided within the partition member (15), the movable member being free to be deformed or displaced in an axial direction of the first mounting member (11). The partition member (15) is provided with a plurality of communicating holes (22) that extend from a portion of the partition member (15) which is exposed to the primary or secondary liquid chamber (16a or 16b) toward the inside of the partition member and are open toward the movable member (23).
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: August 1, 2017
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Masakazu Nagasawa, Akira Ueki, Shuhei Ono, Yasuyuki Nagashima
  • Publication number: 20170167564
    Abstract: A partitioning member (16) of a vibration-damping device (10) is provided with a communication chamber (30), a first communication hole (31) and a second communication hole (32). The first communication hole (31) and the second communication hole (32) are arranged to be offset from each other in the axial direction (O). The first communication hole (31) is formed by the inside of a first protruding tube (31a) that protrudes into the communication chamber (30) from the first wall surface (30a). The second communication hole (32) is formed by the inside of the second protruding tube (32a) that protrudes into the communication chamber (30) from the second wall surface (30b). By including the configuration as described above, simplification of structure can be achieved.
    Type: Application
    Filed: July 22, 2014
    Publication date: June 15, 2017
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Akira UEKI, Masakazu NAGASAWA
  • Publication number: 20160245364
    Abstract: Swirl chamber units (31) allowing a first liquid chamber (14) and a second liquid chamber (15) to communicate with each other are formed in a partitioning member of a vibration-damping device (10) of the present invention. Each swirl chamber unit (31) includes a first communication hole (32a) opening to the first liquid chamber (14), and a second communication hole (32b) opening to the second liquid chamber (15); a first swirl chamber (33a) communicating with the first liquid chamber (14) via the first communication hole (32a), and a second swirl chamber (33b) communicating with the second liquid chamber (15) via the second communication hole (32b); and a flow regulation passage (34) that allows the first swirl chamber (33a) and the second swirl chamber (33b) to communicate with each other and opens to the swirl chambers (33a, 33b) in circumferential directions of the respective swirl chambers (33a, 33b).
    Type: Application
    Filed: October 15, 2014
    Publication date: August 25, 2016
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Akira UEKI, Shingo OONO, Hirokazu WATAI, Masakazu NAGASAWA
  • Publication number: 20160131219
    Abstract: An anti-vibration apparatus (10) includes a first attachment member (11) having a tubular shape and connected to one of a vibration generating section and a vibration receiving section and a second attachment member (12) connected to the other section, an elastic body (13) configured to connect the attachment members to each other, and a partition member (16) configured to partition a liquid chamber in the first attachment member (11) in which a liquid is sealed into a first liquid chamber (14) and a second liquid chamber (15). At least one of the first liquid chamber (14) and the second liquid chamber (15) has the elastic body (13) at a portion of a wall surface.
    Type: Application
    Filed: April 25, 2014
    Publication date: May 12, 2016
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Akira UEKI, Masakazu NAGASAWA, Kenichiro IWASAKI