Patents by Inventor Kazuo Nakai

Kazuo Nakai 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: 11512147
    Abstract: The present invention provides hyaluronic acid derivatives including one or more of each of repeating units represented by the formulae (Ia), (Ib), and (Ic) in which certain cationic sites, certain hydrophobic sites, and certain hydrophilic sites have been introduced. In addition, the present invention provides complexes of the hyaluronic acid derivatives with a drug and pharmaceutical compositions including the hyaluronic acid derivatives, in particular, complexes of the hyaluronic acid derivatives with a drug.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: November 29, 2022
    Assignee: CHUGAI SEIYAKU KABUSHIKI KAISHA
    Inventors: Kazuo Hattori, Takashi Nakai, Teruo Nakamura, Tsuyoshi Shimoboji
  • Patent number: 11462857
    Abstract: A first housing 10 is arranged in a mounting hole 91 of a panel 90. The first housing 10 includes a base portion 27, a coupling portion 28 located forward of the base portion 27, a linking portion 29 linking between the base portion 27 and the coupling portion 28, and a lock arm 30 projecting rearward toward the base portion 27 from the coupling portion 28. The lock arm 30 has a lock surface 34 to be arranged to contact a front surface of the panel 90. The lock arm 30 and the linking portion 29 are both shaped to be resiliently deformable.
    Type: Grant
    Filed: September 15, 2020
    Date of Patent: October 4, 2022
    Assignee: SUMITOMO WIRING SYSTEMS, LTD.
    Inventors: Yukihiro Fukatsu, Asuka Hanji, Kazuo Nakai, Masahiro Nakashima
  • Publication number: 20220239029
    Abstract: A connector 10, 10A includes a male terminal 50, 50A including a tab 52, 52A, a female terminal 70 connectable to the tab 52, 52A, and a housing 20, 20A. The housing 20, 20A includes a holding portion 22 for holding the male terminal 50, 50A and a cavity 23 for accommodating the female terminal 70. One end of the cavity 23 is closed by a wall surface 32 of the holding portion 22. The tab 52, 52A is arranged to project into the cavity 23 from the wall surface 32 of the holding portion 22.
    Type: Application
    Filed: January 12, 2022
    Publication date: July 28, 2022
    Inventor: Kazuo NAKAI
  • Publication number: 20220239032
    Abstract: A connector 10 is provided with a male terminal 40 including a tab 42, a housing 20 for supporting the male terminal 40, a sealing space 32 provided around the tab 42 in the housing 20, a sealing portion 90 to be accommodated into the sealing space 32 while contacting the tab 42, and a pressing portion 100 for setting the sealing portion 90 in a compressed state by being located in the sealing space 32.
    Type: Application
    Filed: January 12, 2022
    Publication date: July 28, 2022
    Inventor: Kazuo NAKAI
  • Patent number: 11389539
    Abstract: The present invention provides hyaluronic acid derivatives into which a certain cationic group and a certain hydrophobic group are introduced, the hyaluronic acid derivatives including one or more repeating units represented by the formula (Ia) and one or more repeating units represented by the formula (Ib).
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: July 19, 2022
    Assignee: CHUGAI SEIYAKU KABUSHIKI KAISHA
    Inventors: Takashi Nakai, Teruo Nakamura, Sayan Chuanoi, Hideyuki Togawa, Tsuyoshi Shimoboji, Kazuo Hattori, Takashi Emura
  • Patent number: 11264760
    Abstract: A first housing 10 includes a resiliently deformable lock arm 30. The lock arm 30 has a lock surface 34 to be arranged to contact a front surface of a panel 90 with the first housing 10 arranged in a mounting hole 91 of the panel 90. A second housing 40 includes a space portion 53 into which an arm plate 72 of a lever 70 is arranged, leg portions 57 rising from the side of an outer wall 52 of the space portion 53 while facing each other, and a bridge portion 58 extending between the leg portions 57 facing each other. The bridge portion 58 includes a releasing portion 65 capable of releasing a state where the lock surface 34 is in contact with the front surface of the panel 90.
    Type: Grant
    Filed: September 10, 2020
    Date of Patent: March 1, 2022
    Assignee: SUMITOMO WIRING SYSTEMS, LTD.
    Inventors: Yukihiro Fukatsu, Asuka Hanji, Kazuo Nakai, Masahiro Nakashima
  • Publication number: 20210098937
    Abstract: A first housing 10 includes a resiliently deformable lock arm 30. The lock arm 30 has a lock surface 34 to be arranged to contact a front surface of a panel 90 with the first housing 10 arranged in a mounting hole 91 of the panel 90. A second housing 40 includes a space portion 53 into which an arm plate 72 of a lever 70 is arranged, leg portions 57 rising from the side of an outer wall 52 of the space portion 53 while facing each other, and a bridge portion 58 extending between the leg portions 57 facing each other. The bridge portion 58 includes a releasing portion 65 capable of releasing a state where the lock surface 34 is in contact with the front surface of the panel 90.
    Type: Application
    Filed: September 10, 2020
    Publication date: April 1, 2021
    Inventors: Yukihiro FUKATSU, Asuka HANJI, Kazuo NAKAI, Masahiro NAKASHIMA
  • Publication number: 20210098938
    Abstract: A first housing 10 is arranged in a mounting hole 91 of a panel 90. The first housing 10 includes a base portion 27, a coupling portion 28 located forward of the base portion 27, a linking portion 29 linking between the base portion 27 and the coupling portion 28, and a lock arm 30 projecting rearward toward the base portion 27 from the coupling portion 28. The lock arm 30 has a lock surface 34 to be arranged to contact a front surface of the panel 90. The lock arm 30 and the linking portion 29 are both shaped to be resiliently deformable.
    Type: Application
    Filed: September 15, 2020
    Publication date: April 1, 2021
    Inventors: Yukihiro FUKATSU, Asuka HANJI, Kazuo NAKAI, Masahiro NAKASHIMA
  • Patent number: 10944204
    Abstract: It is aimed to provide a connector capable of ensuring good sealing. A connector (10) includes a female housing (20) having a female-side sealing surface (22), a male housing (30) having a receptacle (62) into which the female housing (20) is fit, a sealing ring (40) disposed in the receptacle (62) and to be held in close contact with the sealing surface (40) when the female housing (20) and the male housing (30) are connected, and a protecting member (50) mounted on the female housing (20) to cover the female-side sealing surface (22).
    Type: Grant
    Filed: March 9, 2020
    Date of Patent: March 9, 2021
    Inventor: Kazuo Nakai
  • Patent number: 10804639
    Abstract: A connector 20 to be fit into an open receptacle 13 of a male connector 10 includes a terminal 25 connected to an end part of a wire 22, and a housing 40 for holding the terminal 25. The housing 40 includes a lead-out portion 54 for leading out the wire 22 connected to the terminal 25 to outside, a protruding portion 46 protruding outward to face a tip part of the receptacle 13, an external fitting portion 50 projecting from the protruding portion 46 toward the receptacle 13 to be externally fit to the tip part of the receptacle 13 and expose an outer surface of a base end side of the receptacle 13, and a reinforcing rib 60A, 60B connected to the lead-out portion 54 and the protruding portion 46.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: October 13, 2020
    Assignees: AutoNetwork Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Takeshi Masuda, Hiromu Ootani, Takehide Teresawa, Youjirou Hashimoto, Kazuo Nakai
  • Publication number: 20200295501
    Abstract: It is aimed to provide a connector capable of ensuring good sealing. A connector (10) includes a female housing (20) having a female-side sealing surface (22), a male housing (30) having a receptacle (62) into which the female housing (20) is fit, a sealing ring (40) disposed in the receptacle (62) and to be held in close contact with the sealing surface (40) when the female housing (20) and the male housing (30) are connected, and a protecting member (50) mounted on the female housing (20) to cover the female-side sealing surface (22).
    Type: Application
    Filed: March 9, 2020
    Publication date: September 17, 2020
    Inventor: Kazuo Nakai
  • Publication number: 20200099160
    Abstract: A connector 20 to be fit into an open receptacle 13 of a male connector 10 includes a terminal 25 connected to an end part of a wire 22, and a housing 40 for holding the terminal 25. The housing 40 includes a lead-out portion 54 for leading out the wire 22 connected to the terminal 25 to outside, a protruding portion 46 protruding outward to face a tip part of the receptacle 13, an external fitting portion 50 projecting from the protruding portion 46 toward the receptacle 13 to be externally fit to the tip part of the receptacle 13 and expose an outer surface of a base end side of the receptacle 13, and a reinforcing rib 60A, 60B connected to the lead-out portion 54 and the protruding portion 46.
    Type: Application
    Filed: November 22, 2017
    Publication date: March 26, 2020
    Inventors: Takeshi Masuda, Hiromu Ootani, Takehide Teresawa, Youjirou Hashimoto, Kazuo Nakai
  • Patent number: 10498078
    Abstract: A lever-type connector (A) includes a lever (20) to be rotated from an initial position to a connection position in connecting the lever-type connector (A) to a mating connector (B) and located at a retracted position not corresponding to terminal insertion openings (16) in inserting terminal fittings (13) into terminal accommodation chambers (12), a separation restricting lock arm (31) formed on the connector body (10), capable of locking the lever (20) at the connection position in a state where rotation toward the initial position is restricted and configured to unlock the lever (20) by being resiliently deformed, and an excessive rotation restricting lock arm (35) formed on the connector body, capable of locking the lever (20) at the connection position in a state where rotation toward the retracted position is restricted and configured to unlock the lever (20) by being resiliently deformed.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: December 3, 2019
    Assignee: Sumitomo Wiring Systems, Ltd.
    Inventors: Masakazu Suzuki, Kazuo Nakai
  • Publication number: 20190296484
    Abstract: A lever-type connector (A) includes a lever (20) to be rotated from an initial position to a connection position in connecting the lever-type connector (A) to a mating connector (B) and located at a retracted position not corresponding to terminal insertion openings (16) in inserting terminal fittings (13) into terminal accommodation chambers (12), a separation restricting lock arm (31) formed on the connector body (10), capable of locking the lever (20) at the connection position in a state where rotation toward the initial position is restricted and configured to unlock the lever (20) by being resiliently deformed, and an excessive rotation restricting lock arm (35) formed on the connector body, capable of locking the lever (20) at the connection position in a state where rotation toward the retracted position is restricted and configured to unlock the lever (20) by being resiliently deformed.
    Type: Application
    Filed: March 6, 2019
    Publication date: September 26, 2019
    Inventors: Masakazu Suzuki, Kazuo Nakai
  • Publication number: 20190260156
    Abstract: A connector 20 includes a terminal 23 connected to terminal end of a wire 22, an inner housing 40 in which the terminal 23 is housed, an outer housing 60 arranged without being in contact with the inner housing 40, and vibration absorbing rubbers 70A and 70B sandwiched between the inner housing 40 and the outer housing 60 when the two housings are fitted to each other. The vibration absorbing rubbers 70A and 70B have a durometer hardness A in a range from 20 to 70.
    Type: Application
    Filed: July 5, 2017
    Publication date: August 22, 2019
    Inventors: Takehide Terasawa, Hiromu Ootani, Takeshi Masuda, Youjirou Hashimoto, Kazuo Nakai
  • Patent number: 10367301
    Abstract: A lever-type connector (A) includes a connector body (10). A lever (30) has a base end (32) rotatably supported on the connector body (10) and a rotating portion (34) for rotational operation is formed on a tip (33) of the lever (30). A finger contact surface (59) is disposed on an outer surface (58) of the rotating portion (34) and is configured to receive contact of a finger during a rotational operation. A resilient lock (51) is formed on the connector body (10) and is configured to lock the lever (30) in a rotation restricted state. Unlocking portions (53) are formed on the resilient lock (51) and are configured to press the resilient lock (51) in a direction separating from the lever (30). The unlocking portions (30) are exposed on the outer surface (58) of the lever (30) with the resilient lock (51) and the lever (30) locked together.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: July 30, 2019
    Assignee: Sumitomo Wiring Systems, Ltd.
    Inventors: Masakazu Suzuki, Kazuo Nakai
  • Patent number: 10340619
    Abstract: A terminal fitting (10) includes a body (11) in the form of a rectangular tube, a tab (41) of a mating terminal (40) being inserted into the body (11) from the front. A resilient contact piece (22) is accommodated in the body (11). The tab (41) is sandwiched resiliently in a plate thickness direction thereof between the resilient contact piece (22) and a receiving plate (15) of the body (11). Holding portions (30) are formed integrally to the resilient contact piece (22) and capable of holding the tab (41) with a relative displacement of the tab (41) in a width direction with respect to the resilient contact piece (22) restricted by coming into contact with side edges (41S) of the tab (41).
    Type: Grant
    Filed: April 4, 2018
    Date of Patent: July 2, 2019
    Assignee: Sumitomo Wiring Systems, Ltd.
    Inventors: Keiichi Tsukiyoshi, Kazuo Nakai, Takahiko Saitou
  • Patent number: 10320114
    Abstract: A waterproof connector (1) includes an accommodation recess (31) formed in a wire draw-out surface (26) of a housing (10) and configured to accommodate a ventilation film (63). A wire cover (50) is mounted on the housing (10) to cover the wire draw-out surface (26) and the accommodation recess (31). A wire bending space (54) inside the wire cover (50) is configured to bend wires (15) drawn out from the wire draw-out surface (26). A partition (56) is formed in the wire cover (50) and partitions between the accommodation recess (31) and the wire bending space (54) by contacting the wire draw-out surface (26) to cover an opening of the accommodation recess (31). Drainage portions (37, 38, 39, 40) are formed in a contact area between the wire draw-out surface (26) and the partition (56) and has a convexo-concave or stepped cross-sectional shape.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: June 11, 2019
    Assignee: Sumitomo Wiring Systems, Ltd.
    Inventors: Masakazu Suzuki, Kazuo Nakai
  • Publication number: 20190115689
    Abstract: A connector includes a connector housing 10 including a cavity 11, a terminal 50 to be accommodated in the cavity 11 and including a wire connecting portion 53, a wire 30 connected to the wire connecting portion 53 of the terminal 50, a rubber plug 60 to be externally fit on the wire 30 and held in close contact with an inner wall of the cavity 11, and a fixing portion 70 configured to fix the wire 30 and the rubber plug 60. The wire 30 includes a flexible vibration absorbing portion 35 between a part connected to the wire connecting portion 53 and a part fixed by the fixing portion 70.
    Type: Application
    Filed: March 21, 2017
    Publication date: April 18, 2019
    Inventors: Takeshi Masuda, Youjirou Hashimoto, Kazuo Nakai, Hiromu Ootani, Takehide Terasawa
  • Patent number: 10224672
    Abstract: A lever (22) is formed with first driving portions (27) to move sliders (35) from a connection end position to an unlocking position in the process of rotating the lever (22) from a connection position to a switch position. Second driving portions (28) push the sliders (35) parallel to one another from the unlocking position to a connection start position in the process of rotating the lever (22) from the switch position to an initial position and move away from the sliders (35) as the lever (22) rotates from the initial position to the switch position with the sliders (35) located at the connection start position. Locking portions (33) restrict rotation of the lever (22) toward the connection position by being locked to the sliders (35) with the sliders (35) located at the connection start position and the lever (22) located at the switch position.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: March 5, 2019
    Assignee: Sumitomo Wiring Systems, Ltd.
    Inventors: Masakazu Suzuki, Kazuo Nakai