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: 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
  • Publication number: 20160102728
    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: Application
    Filed: May 22, 2014
    Publication date: April 14, 2016
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Akira UEKI, Masakazu NAGASAWA
  • Publication number: 20160053846
    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: Application
    Filed: August 7, 2015
    Publication date: February 25, 2016
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Masakazu NAGASAWA, Akira UEKI, Shuhei ONO, Yasuyuki NAGASHIMA
  • Publication number: 20160053844
    Abstract: A vibration isolator includes: a first mounting member (11) and a second mounting member (12); an elastic body (13) connecting the mounting members; a partition member (15) partitioning a liquid chamber (16) in the first mounting member (11) into a primary liquid chamber (16a) using the 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 liquid chamber (16a) or the secondary liquid chamber (16b) toward an inside of the partition member and are opened toward the movable member (23).
    Type: Application
    Filed: August 12, 2015
    Publication date: February 25, 2016
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Masakazu NAGASAWA, Akira UEKI, Shuhei ONO, Yasuyuki NAGASHIMA
  • Publication number: 20160053845
    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: Application
    Filed: August 6, 2015
    Publication date: February 25, 2016
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Akira UEKI, Masakazu NAGASAWA, Shuhei ONO, Yasuyuki NAGASHIMA
  • Patent number: 7867514
    Abstract: Disclosed is a method for stabilizing a solid pharmaceutical preparation containing a pharmacological substance and sodium lauryl sulfate, the method comprising incorporating into the preparation at least one member selected from the group consisting of neutral salts, basic salts and basic substances. The preparation containing sodium lauryl sulfate prepared by the method of the invention has superior performance, including high storage stability, suppression of discoloration and deterioration, and prevention of change in its properties, such as the dissolution rate of pharmacological substance from the preparation.
    Type: Grant
    Filed: May 23, 2001
    Date of Patent: January 11, 2011
    Assignee: Otsuka Pharmaceutical Co., Ltd.
    Inventors: Yuso Tomohira, Tadashi Mukai, Minoru Kashimoto, Masakazu Nagasawa, Tetsuroh Ichiba, Daisuke Kuribayashi, Yoshikazu Oka, Hajime Toguchi
  • Patent number: 6900412
    Abstract: A glow plug according to one embodiment of the present invention includes a cylindrical metallic shell, an electrode rod disposed in a rear portion of the metallic shell, a heater disposed in a front portion of the metallic shell, and an electric insulator provided between an inner surface of the metallic shell and a circumferential surface of the electrode rod to keep the electrode rod insulated from the metallic shell. The metallic shell has a portion caulked to the electrode rod at a location axially corresponding to the electric insulator so that the circumferential surface of the electrode rod becomes deformed to define therein a recessed portion. The caulked portion is engaged in the recessed portion with the caulked portion with the electric insulator interposed between the caulked portion and the recessed portion, thereby securing the electrode rod in the metallic shell.
    Type: Grant
    Filed: August 11, 2003
    Date of Patent: May 31, 2005
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Masato Taniguchi, Masakazu Nagasawa, Nobuyuki Hotta, Katsuhiko Tanaka
  • Patent number: 6844525
    Abstract: In a glow plug configured such that a metallic, tubular member having a heater fixedly provided therein is joined to a metallic shell, an external-thread portion is formed on the outer circumferential surface of the metallic shell so as to allow the glow plug to be screwed into a plug-mounting hole formed in an engine head. An annular protrusion is formed on the outer circumferential surface of the metallic, tubular member in such a manner as to protrude radially outward, to annularly extend in the circumferential direction, and to be located in the vicinity of a distal end of the metallic shell. A distally-facing end face of the annular protrusion abuts an annular seat face in the mounting hole, and the metallic, tubular member and the metallic shell are joined such that a distal end face of the metallic shell abuts a rearward-facing end face of the annular protrusion.
    Type: Grant
    Filed: November 17, 2003
    Date of Patent: January 18, 2005
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Takaya Yoshikawa, Hiroyuki Suzuki, Masakazu Nagasawa
  • Patent number: 6770850
    Abstract: A heater has a cylindrical metallic shell, a heater body partly disposed in a front end portion of the metallic shell, an electrode disposed in a rear portion of the metallic shell and electrically connected to the heater body, and a terminal adapted to be capped with an electric connector. The terminal includes a terminal body for power supply to the heater body through the electrode and an engaging portion formed on an outer circumferential surface of the terminal body so as to be engageable with the electric connector. The electrode and the terminal body are formed integrally with each other. Such a heater can maintain good electrical conduction from the terminal to the heater body with its simple structure throughout an extended period of time.
    Type: Grant
    Filed: July 31, 2002
    Date of Patent: August 3, 2004
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Masato Taniguchi, Katsuhiko Tanaka, Masakazu Nagasawa
  • Publication number: 20040124754
    Abstract: In a glow plug configured such that a metallic, tubular member having a heater fixedly provided therein is joined to a metallic shell, an external-thread portion is formed on the outer circumferential surface of the metallic shell so as to allow the glow plug to be screwed into a plug-mounting hole formed in an engine head. An annular protrusion is formed on the outer circumferential surface of the metallic, tubular member in such a manner as to protrude radially outward, to annularly extend in the circumferential direction, and to be located in the vicinity of a distal end of the metallic shell. A distally-facing end face of the annular protrusion abuts an annular seat face in the mounting hole, and the metallic, tubular member and the metallic shell are joined such that a distal end face of the metallic shell abuts a rearward-facing end face of the annular protrusion.
    Type: Application
    Filed: November 17, 2003
    Publication date: July 1, 2004
    Applicant: NGK Spark Plug Co., Ltd.
    Inventors: Takaya Yoshikawa, Hiroyuki Suzuki, Masakazu Nagasawa
  • Patent number: 6744015
    Abstract: The present invention provides an inexpensive heater exhibiting good gas-tightness, as well as a method for manufacturing the same. The heater includes a cylindrical metallic shell having a through-hole with a heating element disposed in the through-hole such that a portion projects from one end of the shell. The heater is adapted to generate heat upon application of electricity thereto. A rod-like axial member has a coil lead for electrically connecting a portion of the axial member and the heating element. A gas-tight seal member formed of an insulating polymeric material is interposed between the axial member and the inner surface of the through-hole in such a manner to surround the outer circumferential surface of the axial member. A crimped portion of the metallic shell brings the gas-tight seal member into close contact with the outer circumferential surface of the axial member and the inner wall surface of the through-hole form a gas tight seal.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: June 1, 2004
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Katsuhiko Tanaka, Masakazu Nagasawa
  • Publication number: 20040026399
    Abstract: A glow plug according to one embodiment of the present invention includes a cylindrical metallic shell, an electrode rod disposed in a rear portion of the metallic shell, a heater disposed in a front portion of the metallic shell,and an electric insulator provided between an inner surface of the metallic shell and a circumferential surface of the electrode rod to keep the electrode rod insulated from the metallic shell. The metallic shell has a portion caulked to the electrode rod at a location axially corresponding to the electric insulator so that the circumferential surface of the electrode rod becomes deformed to define therein a recessed portion. The caulked portion is engaged In the recessed portion with the caulked portion with the electric insulator interposed between the caulked portion and the recessed portion, thereby securing the electrode rod in the metallic shell.
    Type: Application
    Filed: August 11, 2003
    Publication date: February 12, 2004
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Masato Taniguchi, Masakazu Nagasawa, Nobuyuki Hotta, Katsuhiko Tanaka
  • Patent number: 6616494
    Abstract: Supplying pellets without the risk of enlarging the apparatus size or moisture absorption of the pellets by disposing a rotation drum provided with a pellet storage room in a sealed case with an inert gas supply. The apparatus according to the present invention has a main body case with a rotation drum storage part formed therein, a lid mounted on the front surface opening part of the main body case, a rotation drum disposed rotatably in the rotation drum storage part, and a pellet supply nozzle elongating from the main body. Through holes having a size capable of inserting a pellet are provided on the circumferential wall of the rotation drum with an equal interval in the circumferential direction as well as the side wall of the main body case to be contacted slidably with the circumferential wall of the rotation drum.
    Type: Grant
    Filed: June 23, 2000
    Date of Patent: September 9, 2003
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Akihiro Nagata, Kunio Fukai, Masakazu Nagasawa, Takeshi Fukuyo
  • Publication number: 20030161873
    Abstract: Disclosed is a method for stabilizing a solid pharmaceutical preparation containing a pharmacological substance and sodium lauryl sulfate, the method comprising incorporating into the preparation at least one member selected from the group consisting of neutral salts, basic salts and basic substances. The preparation containing sodium lauryl sulfate prepared by the method of the invention has superior performance, including high storage stability, suppression of discoloration and deterioration, and prevention of change in its properties, such as the dissolution rate of pharmacological substance from the preparation.
    Type: Application
    Filed: November 21, 2002
    Publication date: August 28, 2003
    Inventors: Yuso Tomohira, Tadashi Mukai, Minoru Kashimoto, Masakazu Nagasawa, Tetsuroh Ichiba, Daisuke Kuribayashi, Yoshikazu Oka, Hajime Toguchi
  • Patent number: 6557379
    Abstract: A pair of chucks, which grip end portions of a cylindrical glass tube blank, are moved by a chuck moving mechanism toward each other, so that softened glass in an intermediate portion of the cylindrical glass tube blank is gathered, thereby forming a shape that is suitable for blow molding a light emitting tube portion. In the approaching movement, the position of one chuck is detected by using a laser position detector, and a result of the detection is fed back to the chuck moving mechanism, so as to control the approach distances of the chucks. The laser position detector detects the position of the chuck itself. Therefore, even when the positional relationship between the chuck and the chuck moving mechanism is varied, or backlash or deformation occurs in the chuck moving mechanism, the correct position of the chuck still is detected irrespective of such variation, backlash or deformation.
    Type: Grant
    Filed: October 30, 2000
    Date of Patent: May 6, 2003
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Masakazu Nagasawa, Masayuki Umehara, Hiroshi Goto