Patents by Inventor Tasuku Kikkawa

Tasuku Kikkawa 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: 20210289934
    Abstract: An interdental cleaning tool that is easily insertable in an interdental space by a user and has a high cleaning capability includes a base portion including a shaft portion having a shape insertable in an interdental space, and a cleaning portion that covers at least a portion of the shaft portion and is capable of cleaning an interdental space. The shaft portion has a triangular cross section on an orthogonal plane perpendicularly intersecting an axial direction of the shaft portion.
    Type: Application
    Filed: April 26, 2019
    Publication date: September 23, 2021
    Applicant: KOBAYASHI PHARMACEUTICAL CO., LTD.
    Inventor: Tasuku KIKKAWA
  • Publication number: 20210290353
    Abstract: The interdental cleaning tool includes a base portion including a shaft portion that extends from a base end side to a top end side and gradually becomes thinner from the base end side to the top end side, a top end side cleaning portion including a top end side body covering a top end side portion of the shaft portion and top end side bristles protruding outward from an outer circumferential surface of the top end side body, and a base end side cleaning portion including a base end side body covering a portion of the shaft portion in the base end side than the top end side body and base end side bristles protruding outward from an outer circumferential surface of the base end side body. The top end side cleaning portion has a higher hardness than the base end side cleaning portion.
    Type: Application
    Filed: April 26, 2019
    Publication date: September 23, 2021
    Applicant: KOBAYASHI PHARMACEUTICAL CO., LTD.
    Inventor: Tasuku KIKKAWA
  • Publication number: 20210267732
    Abstract: Provided is an interdental cleaning tool that is not too soft and is unlikely to break during use. An interdental cleaning tool according to the present invention includes: a cleaning tool body that is made of a synthetic resin, and includes a grip portion that is capable of being gripped with fingers of a user and a shaft portion that extends in one direction from the grip portion; and a cleaning portion configured to clean between teeth, covering a leading end of the shaft portion, and made of an elastomer, wherein Y>?0.07X+3.3 is satisfied, where Y is a maximum torque value (N·cm) when the grip portion is rotated at a rotational speed of 10 rpm about a position located 15 mm away from a leading end of the cleaning portion, and X is a rotational angle (degrees) when the maximum torque value is measured.
    Type: Application
    Filed: May 16, 2019
    Publication date: September 2, 2021
    Applicant: KOBAYASHI PHARMACEUTICAL CO., LTD.
    Inventors: Tasuku KIKKAWA, Yuji SAIKI, Tomokazu YOSHIDA
  • Publication number: 20210251373
    Abstract: An interdental cleaning tool capable of reducing possibility of a cleaning portion being detached from a shaft portion includes a base portion including a shaft portion (20) having a shape insertable in an interdental space, and a cleaning portion (50) that covers at least a portion of the shaft portion and is capable of cleaning an interdental space. The base portion further includes a protruding portion (40) that protrudes from a covered portion (22) in a direction intersecting the shaft portion (20), the covered portion (22) being a portion of the shaft portion (20) and covered by the cleaning portion (50).
    Type: Application
    Filed: April 26, 2019
    Publication date: August 19, 2021
    Applicant: KOBAYASHI PHARMACEUTICAL CO., LTD.
    Inventor: Tasuku KIKKAWA
  • Publication number: 20210251375
    Abstract: The cleaning portion includes a cleaning portion body and a brush portion. The brush portion includes a first brush group and a second brush group. Bristles of the first brush group and the second brush group each have a shape whose a protruding length from the cleaning portion body gradually increases from a top end side to a base end side of the shaft portion. A protruding length from the cleaning portion body of a predetermined numbered one of the second brush group from the top end side to the base end side of the shaft portion is larger than a protruding length from the cleaning portion body of the predetermined numbered one of the bristles of the first brush group from the top end side to the base end side of the shaft portion.
    Type: Application
    Filed: April 26, 2019
    Publication date: August 19, 2021
    Applicant: KOBAYASHI PHARMACEUTICAL CO., LTD.
    Inventor: Tasuku KIKKAWA
  • Publication number: 20210236252
    Abstract: Provided is an interdental cleaning tool that can reduce at least one of a resistance against insertion in an interdental space and a resistance against withdrawal from an interdental space, and has a high capability of scraping out deposit from an interdental space. The interdental cleaning tool includes a base portion including a shaft portion (20) and a cleaning portion (40). The cleaning portion (40) includes a cleaning portion body (50) and a plurality of bristles (60). The plurality of bristles (60) include at least one of a type of top end-oriented bristles and a type of base end-oriented bristles. The top end-oriented bristle has a shape titling to a top end side of the shaft portion (20) as advancing away from an outer circumferential surface of the cleaning portion body (50). The base end-oriented bristle has a shape tilting to a base end side of the shaft portion (20) as advancing away from the outer circumferential surface of the cleaning portion body (50).
    Type: Application
    Filed: April 26, 2019
    Publication date: August 5, 2021
    Applicant: KOBAYASHI PHARMACEUTICAL CO., LTD.
    Inventor: Tasuku KIKKAWA
  • Publication number: 20210186201
    Abstract: An interdental cleaning tool (2) includes a base portion (10) having a shaft portion (20) and a grip portion (30), and a cleaning portion (40). The cleaning portion (40) has a cleaning portion main body (42) and brush portions (44). Each of the brush portions (44) has a brush main body having a shape protruding outward from the cleaning portion main body in an axially intersecting direction, and a protrusion that has a shape protruding outward in a reference plane, which is a plane encompassing a center axis of the shaft portion (20) and a center axis of the brush main body, from an outer edge of the brush main body when the brush main body is cut along the reference plane, and is continuously connected along the outer edge of the brush main body.
    Type: Application
    Filed: June 14, 2018
    Publication date: June 24, 2021
    Applicant: KOBAYASHI PHARMACEUTICAL CO., LTD.
    Inventor: Tasuku KIKKAWA
  • Patent number: 11026771
    Abstract: An interdental cleaning instrument is equipped with a base part and a cleaning part. The base part has a shaft part and a grip part. At least the shape of the base part is set in a manner such that a first pressing force required to press a portion spaced 2.5 mm apart from a tip of the cleaning part in 10 mm is 0.3 N or more and 1.4 N or less in a state in which a portion spaced 10 mm apart from the tip of the cleaning part is fixed, and a second pressing force required to press a portion spaced 8.0 mm apart from the tip of the cleaning part in 10 mm is 0.5 N or more and 2.5 N or less in a state in which a portion spaced 35 mm apart from the tip of the cleaning part is fixed.
    Type: Grant
    Filed: June 25, 2015
    Date of Patent: June 8, 2021
    Assignee: KOBAYASHI PHARMACEUTICAL CO., LTD.
    Inventor: Tasuku Kikkawa
  • Publication number: 20210145554
    Abstract: An interdental cleaning tool (2) includes a base portion (10) having a shaft portion (20) and a grip portion (30), and a cleaning portion (40). The cleaning portion (40) has a cleaning portion main body (42) and a plurality of brush portions (44). Each of the brush portions (44) has a brush main body having a shape protruding outward from the cleaning portion main body in an axially intersecting direction, and a scraping step portion that protrudes from an outer circumferential surface of the brush main body in a direction orthogonal to the axially intersecting direction, the brush main body extending from a proximal end portion to a distal end portion of the brush main body and being formed to be flat.
    Type: Application
    Filed: June 14, 2018
    Publication date: May 20, 2021
    Applicant: KOBAYASHI PHARMACEUTICAL CO., LTD.
    Inventor: Tasuku KIKKAWA
  • Patent number: 10918466
    Abstract: [Problem] To provide a base part, an interdental cleaning tool, and a method for manufacturing the interdental cleaning tool, capable of preventing bending of a shaft part when a resin material is filled from an insertion end. [Solution] A base part includes a shaft part (20) and a grip part (30). The base part is used for forming an interdental cleaning tool by filling, inside a metal mold having a shape that forms a filling space around the shaft part (20), a resin material into the filling space with the shaft part (20) clamped by a holding pin. The shaft part (20) includes a first guide groove (24) formed on one side with respect to an axially parallel plane and a second guide groove (26) formed on the other side with respect to the axially parallel plane.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: February 16, 2021
    Assignee: KOBAYASHI PHARMACEUTICAL CO., LTD.
    Inventors: Tasuku Kikkawa, Shinji Yuumei
  • Publication number: 20200189159
    Abstract: To provide method for manufacturing interdental cleaner for suppressing elastomer from insufficiently filling into space around shaft portion in filling the elastomer into mold. Method for manufacturing interdental cleaner includes first step of molding base portion having handle portion and shaft portion (40) by filling composite material into first mold, and second step of forming cleaning portion, slip resistance portion and coupling portion by filling elastomer into second mold (200) from distal end portion side of shaft portion (40) with base portion situated in second mold (200), second mold (200) having second space for forming cleaning portion, slip resistance portion and coupling portion. What is used as second mold (200) in second step has ratio no less than 40% of a flow path area in second space for elastomer around distal end portion of handle portion to flow path area in second space for elastomer around proximal end portion of shaft portion (40).
    Type: Application
    Filed: December 28, 2017
    Publication date: June 18, 2020
    Applicant: KOBAYASHI PHARMACEUTICAL CO., LTD.
    Inventor: Tasuku KIKKAWA
  • Publication number: 20200188071
    Abstract: To provide method for manufacturing interdental cleaner configured to suppress leakage of elastomer from space for forming slip resistance portion in mold to outside of space in step of filling elastomer into mold. Method for manufacturing interdental cleaner includes first step of molding base portion having handle portion and shaft portion (40) by filling composite material into first mold, and second step of forming cleaning portion and slip resistance portion by filling elastomer into second mold (200) with the base portion situated in second mold (200). In first step, what is molded has handle portion including base (24), recessed portion (26), and bulge portion (28) bulging from surface of the recessed portion (26). In second step, cleaning portion and slip resistance portion are formed by filling elastomer into second space from portion of base portion distant from bulge portion (28) toward shaft portion (40).
    Type: Application
    Filed: December 28, 2017
    Publication date: June 18, 2020
    Applicant: KOBAYASHI PHARMACEUTICAL CO., LTD.
    Inventor: Tasuku KIKKAWA
  • Publication number: 20190343608
    Abstract: In order to prevent shaft portion from being broken in ejection of base portion from mold, method for manufacturing interdental cleaning tool includes: base portion forming step of forming base portion by filling first space of primary mold (50) with synthetic resin, which includes first and second mold members (50A, 50B); and cleaning portion forming step of forming cleaning portion around shaft portion by filling second space of secondary mold with elastomer. Base portion forming step uses first and second mold members (50A, 50B). First and second molds include: first and second contact surfaces (51A, 51B); pair of first and second spaced-apart portions (54A, 54B); and first and second connection portions (52A, 52B), angle (0) between each of first and second spaced-apart portions (54A, 54B) and separation plane being acute.
    Type: Application
    Filed: February 14, 2018
    Publication date: November 14, 2019
    Applicant: KOBAYASHI PHARMACEUTICAL CO., LTD.
    Inventors: Tasuku KIKKAWA, Shinji YUUMEI
  • Publication number: 20190192265
    Abstract: An interdental cleaning tool (1) that includes a base (10) that has a shaft (20) shaped to be capable of being inserted between teeth, the base (10) being formed from a composite material that contains a synthetic resin, a reinforcement containing glass, and a copolymer having, as structural units, a polyolefin and an anhydride of an unsaturated carboxylic acid.
    Type: Application
    Filed: September 26, 2017
    Publication date: June 27, 2019
    Applicant: KOBAYASHI PHARMACEUTICAL CO., LTD.
    Inventors: Tasuku KIKKAWA, Narutomo SHIRAKI, Noboru KUSAKABE
  • Publication number: 20190000598
    Abstract: An interdental cleaning tool (1) comprises a base (10) having a shaft (20) that has a shape to be inserted into an interdental space, wherein the base (10) is formed of a composite material comprising a synthetic resin, a reinforcement material and a low-hardness resin having a lower hardness than the hardness of the synthetic resin.
    Type: Application
    Filed: December 16, 2016
    Publication date: January 3, 2019
    Applicant: Kobayashi Pharmaceutical Co., Ltd.
    Inventors: Tasuku Kikkawa, Narutomo Shiraki, Satoru Komiyama, Noboru Kusakabe, Shinji Yumei, Masanori Kawakami
  • Publication number: 20180279766
    Abstract: A cleaning implement equipped with: a shaft part having an insertion end section and a base end section; and a cleaning part comprising an elastomer and capable of cleaning a gap. The cleaning part has a cleaning-part body and a guide part for projecting farther outward in the axial direction than the insertion end section, and guiding the insertion of the cleaning-part body into a gap. The projection dimension of the guide part from the insertion end section is equal to or greater than the thickness of the cleaning-part body, and the guide part has a shape that can be elastically deformed so as to be displaced relative to the insertion end section in the axially perpendicular direction.
    Type: Application
    Filed: June 25, 2015
    Publication date: October 4, 2018
    Applicant: KOBAYASHI PHARMACEUTICAL CO., LTD.
    Inventor: Tasuku KIKKAWA
  • Publication number: 20180263741
    Abstract: An interdental cleaning instrument is equipped with a base part and a cleaning part. The base part has a shaft part and a grip part. At least the shape of the base part is set in a manner such that a first pressing force required to press a portion spaced 2.5 mm apart from a tip of the cleaning part in 10 mm is 0.3 N or more and 1.4 N or less in a state in which a portion spaced 10 mm apart from the tip of the cleaning part is fixed, and a second pressing force required to press a portion spaced 8.0 mm apart from the tip of the cleaning part in 10 mm is 0.5 N or more and 2.5 N or less in a state in which a portion spaced 35 mm apart from the tip of the cleaning part is fixed.
    Type: Application
    Filed: June 25, 2015
    Publication date: September 20, 2018
    Applicant: KOBAYASHI PHARMACEUTICAL CO., LTD.
    Inventor: Tasuku KIKKAWA
  • Publication number: 20180256298
    Abstract: [Problem] To provide a base part, an interdental cleaning tool, and a method for manufacturing the interdental cleaning tool, capable of preventing bending of a shaft part when a resin material is filled from an insertion end. [Solution] A base part includes a shaft part (20) and a grip part (30). The base part is used for forming an interdental cleaning tool by filling, inside a metal mold having a shape that forms a filling space around the shaft part (20), a resin material into the filling space with the shaft part (20) clamped by a holding pin. The shaft part (20) includes a first guide groove (24) formed on one side with respect to an axially parallel plane and a second guide groove (26) formed on the other side with respect to the axially parallel plane.
    Type: Application
    Filed: August 26, 2016
    Publication date: September 13, 2018
    Applicant: KOBAYASHI PHARMACEUTICAL CO., LTD.
    Inventors: Tasuku KIKKAWA, Shinji YUUMEI
  • Patent number: D809303
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: February 6, 2018
    Assignee: KOBAYASHI PHARMACEUTICAL CO., LTD.
    Inventors: Tasuku Kikkawa, Shinji Yuumei
  • Patent number: D841251
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: February 19, 2019
    Assignee: KOBAYASHI PHARMACEUTICAL CO., LTD.
    Inventors: Tasuku Kikkawa, Shinji Yuumei