Patents by Inventor Hiroyuki Nakasuka

Hiroyuki Nakasuka 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: 11279053
    Abstract: Disclosed is a blade unit for a safety razor comprising a connecting structure for fixing the blade unit to a handle, a blade housing comprising a plurality of blades having cutting edges lying in a shaving plane, and a rear portion next to the plurality of blades, comprising a non-flexible back portion extending parallel to the shaving plane, and a lubricating pad having a flexible portion and a non-flexible portion, the non-flexible portion being arranged on and supported by the non-flexible back portion, the flexible portion extending rearwards from the non-flexible portion beyond the non-flexible back portion to define a rear edge of the rear portion of the blade unit, the flexible portion forming a convex skin-contacting surface when bending away from the shaving plane in use.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: March 22, 2022
    Assignee: KAI R&D CENTER CO., LTD.
    Inventors: Michael Lessmann, Jens Treu, Kesen Zeng, Yvonne Neumann, Hiroyuki Nakasuka
  • Patent number: 10807258
    Abstract: Disclosed is a blade unit for a safety razor, comprising a blade housing comprising a plurality of blades having respective cutting edges lying in a shaving plane and being arranged to exert a cutting action when moved across a user's skin; and a guard in front of the cutting edges and a cap to the rear of the cutting edges, the guard including an elongate lubricating strip, and the cap including a convex lubricating pad having a convex skin-contacting surface and a rear edge curved in a single arc shape along its entirety. A skin-contacting surface of the convex lubricating pad is greater than a skin-contacting surface of the elongate lubricating strip, the convex lubricating pad and the elongate lubricating strip together extend along at least 60% of an outer perimeter of the blade unit, and the convex lubricating pad extends along at least 30% of the outer perimeter of the blade unit.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: October 20, 2020
    Assignee: BEIERSDORF AG
    Inventors: Michael Lessmann, Jens Treu, Kesen Zeng, Yvonne Neumann, Hiroyuki Nakasuka, Ralf Hagens, Philip Drescher
  • Patent number: 10717202
    Abstract: Disclosed is a blade unit for a safety razor, comprising: a blade housing comprising a plurality of blades having respective cutting edges lying in a shaving plane and being arranged to exert a cutting action when moved across a user's skin in a shaving direction; and a guard in front of the cutting edges and a cap to the rear of the cutting edges, the guard including an elongate lubricating strip, the cap including a non-flexible concave back portion supporting a convex lubricating pad, the convex lubricating pad having a convex skin-contacting surface and a rear edge curved in a single arc shape along its entirety. No separate frame is provided around an outer perimeter for fixing the convex lubricating pad, so that the convex lubricating pad rear edge meets flush with the non-flexible concave back portion, providing a smooth, lubricated rear edge of the blade unit.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: July 21, 2020
    Assignee: BEIERSDORF AG
    Inventors: Michael Lessmann, Jens Treu, Kesen Zeng, Yvonne Neumann, Hiroyuki Nakasuka, Ralf Hagens, Philip Drescher
  • Patent number: 10391653
    Abstract: Embodiments of the invention include a blade unit for a safety razor, comprising: a connecting structure configured to fix the blade unit to a handle; a blade housing comprising a plurality of blades having respective cutting edges lying in a shaving plane and being arranged to exert a cutting action when moved across a user's skin in a shaving direction; and a rear portion arranged next to the plurality of blades in the shaving direction, comprising a non-flexible concave back portion that arcuately bends away from the shaving plane, and a convex lubricating pad arranged on and being supported by the non-flexible concave back portion and which extends up to a rear edge of the rear portion of the blade unit.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: August 27, 2019
    Assignee: BEIERSDORF AG
    Inventors: Michael Lessmann, Jens Treu, Kesen Zeng, Yvonne Neumann, Hiroyuki Nakasuka, Ralf Hagens, Philip Drescher
  • Patent number: 10252432
    Abstract: In a razor having a blade body assembling portion provided with a blade support supporting a blade body and a shaving aid, the blade support is provided with an outer frame portion, to which the shaving aid is attached. The shaving aid is protruded from the outer frame portion. The shaving aid has a deformable portion, which is provided in a cantilever manner. The deformable portion is deformable along with contact with a skin surface during use. A protruding edge portion provided in the deformable portion is exposed to the outside in a protruding direction of the shaving aid.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: April 9, 2019
    Assignee: KAI R&D CENTER CO., LTD.
    Inventor: Hiroyuki Nakasuka
  • Publication number: 20180079094
    Abstract: Disclosed is a blade unit for a safety razor, comprising: a blade housing comprising a plurality of blades having respective cutting edges lying in a shaving plane and being arranged to exert a cutting action when moved across a user's skin in a shaving direction; and a guard in front of the cutting edges and a cap to the rear of the cutting edges, the guard including an elongate lubricating strip, the cap including a non-flexible concave back portion supporting a convex lubricating pad, the convex lubricating pad having a convex skin-contacting surface and a rear edge curved in a single arc shape along its entirety. No separate frame is provided around an outer perimeter for fixing the convex lubricating pad, so that the convex lubricating pad rear edge meets flush with the non-flexible concave back portion, providing a smooth, lubricated rear edge of the blade unit.
    Type: Application
    Filed: July 24, 2015
    Publication date: March 22, 2018
    Inventors: Michael LESSMANN, Jens TREU, Kesen ZENG, Yvonne NEUMANN, Hiroyuki NAKASUKA, Ralf HAGENS, Philip DRESCHER
  • Publication number: 20170232625
    Abstract: Embodiments of the invention include a blade unit (10) for a safety razor (8), comprising: a connecting structure (14) configured to fix the blade unit to a handle (16); a blade housing (12) comprising a plurality of blades (18) having respective cutting edges (20) lying in a shaving plane and being arranged to exert a cutting action when moved across a user's skin in a shaving direction; and a rear portion (24) arranged next to the plurality of blades in the shaving direction, comprising a non-flexible concave back portion (26) that arcuately bends away from the shaving plane, and a convex lubricating pad (22) arranged on and being supported by the non-flexible concave back portion and which extends up to a rear edge (28) of the rear portion of the blade unit.
    Type: Application
    Filed: April 27, 2015
    Publication date: August 17, 2017
    Inventors: Michael LESSMANN, Jens TREU, Kesen ZENG, Yvonne NEUMANN, Hiroyuki NAKASUKA, Ralf HAGENS, Philip DRESCHER
  • Publication number: 20170225344
    Abstract: Disclosed is a blade unit for a safety razor, comprising a blade housing comprising a plurality of blades having respective cutting edges lying in a shaving plane and being arranged to exert a cutting action when moved across a user's skin; and a guard in front of the cutting edges and a cap to the rear of the cutting edges, the guard including an elongate lubricating strip, and the cap including a convex lubricating pad having a convex skin-contacting surface and a rear edge curved in a single arc shape along its entirety. A skin-contacting surface of the convex lubricating pad is greater than a skin-contacting surface of the elongate lubricating strip, the convex lubricating pad and the elongate lubricating strip together extend along at least 60% of an outer perimeter of the blade unit, and the convex lubricating pad extends along at least 30% of the outer perimeter of the blade unit.
    Type: Application
    Filed: July 24, 2015
    Publication date: August 10, 2017
    Inventors: Michael LESSMANN, Jens TREU, Kesen ZENG, Yvonne NEUMANN, Hiroyuki NAKASUKA, Ralf HAGENS, Philip DRESCHER
  • Publication number: 20170217034
    Abstract: Disclosed is a blade unit for a safety razor comprising a connecting structure for fixing the blade unit to a handle, a blade housing comprising a plurality of blades having cutting edges lying in a shaving plane, and a rear portion next to the plurality of blades, comprising a non-flexible back portion extending parallel to the shaving plane, and a lubricating pad having a flexible portion and a non-flexible portion, the non-flexible portion being arranged on and supported by the non-flexible back portion, the flexible portion extending rearwards from the non-flexible portion beyond the non-flexible back portion to define a rear edge of the rear portion of the blade unit, the flexible portion forming a convex skin-contacting surface when bending away from the shaving plane in use.
    Type: Application
    Filed: April 27, 2015
    Publication date: August 3, 2017
    Inventors: Michael LESSMANN, Jens TREU, Kesen ZENG, Yvonne NEUMANN, Hiroyuki NAKASUKA
  • Publication number: 20170203452
    Abstract: In a razor having a blade body assembling portion provided with a blade support supporting a blade body and a shaving aid, the blade support is provided with an outer frame portion, to which the shaving aid is attached. The shaving aid is protruded from the outer frame portion. The shaving aid has a deformable portion, which is provided in a cantilever manner. The deformable portion is deformable along with contact with a skin surface during use. A protruding edge portion provided in the deformable portion is exposed to the outside in a protruding direction of the shaving aid.
    Type: Application
    Filed: July 29, 2015
    Publication date: July 20, 2017
    Inventor: HIROYUKI NAKASUKA
  • Patent number: 9498892
    Abstract: An elastic plate is located between the support portion at the head portion of the holder and the supported portion of the razor head. The outer circumference of the annular elastic portion of the elastic plate is supported by the inner circumference of the annular portion of the support portion. The supported portion of the razor head is inserted into the inner circumference of the annular elastic portion of the elastic plate. As a result of the support structure to support the razor head to be movable from a neutral position against the elastic force of the elastic plate, the razor head can be moved during use from the neutral position to positions in three dimensions against the elastic force of the elastic plate.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: November 22, 2016
    Assignee: KAI R&D CENTER CO., LTD.
    Inventors: Hiroyuki Nakasuka, Daisuke Haba
  • Publication number: 20140096402
    Abstract: An elastic plate is located between the support portion at the head portion of the holder and the supported portion of the razor head. The outer circumference of the annular elastic portion of the elastic plate is supported by the inner circumference of the annular portion of the support portion. The supported portion of the razor head is inserted into the inner circumference of the annular elastic portion of the elastic plate. As a result of the support structure to support the razor head to be movable from a neutral position against the elastic force of the elastic plate, the razor head can be moved during use from the neutral position to positions in three dimensions against the elastic force of the elastic plate.
    Type: Application
    Filed: May 15, 2012
    Publication date: April 10, 2014
    Applicant: KAI R&D CENTER CO., LTD.
    Inventors: Hiroyuki Nakasuka, Daisuke Haba
  • Patent number: 8166658
    Abstract: A shaving aid member pivots in a predetermined range from an initial position to a pivot position with respect to a razor head against elastic force of leaf springs. In the shaving aid member, a mounting portion of a base member is aligned with the razor head and two arm portions of the base member are invisible from the front side of the razor head. This reduces the space occupied by the arm portions outside the outer peripheral portion of the razor head. As a result, in a razor with a shaving aid, comfort in use is enhanced. Further, the razor is compact-sized since the surface area of the front side of the portion outlined by the razor head and the shaving aid member is decreased.
    Type: Grant
    Filed: October 26, 2007
    Date of Patent: May 1, 2012
    Assignee: KAI R&D Center Co., Ltd.
    Inventor: Hiroyuki Nakasuka
  • Patent number: 8104179
    Abstract: A razor head 2 is provided with a blade member 3 having a base and a blade body 4 on the base, a blade base member 5 arranged on the bottom side of the razor head 2, and a top member 6 arranged on the top side of the razor head 2. The blade member 3 is fitted between the blade base member 5 and the top member 6. The base of the blade member 3 is supported on the blade base member 5. A cutting edge 4a of the blade body 4 is exposed at the top member 6. The base is provided with a pair of leaf springs arranged between the blade base member 5 and the top member 6. A back opening 19 is disposed on the bottom side of the razor head 2 between both leaf springs, and a front opening 20 is disposed on the top side of the razor head 2. The base is provided with a debris discharge hole 18 between the front opening 20 and the back opening 19.
    Type: Grant
    Filed: February 14, 2007
    Date of Patent: January 31, 2012
    Assignee: Kai R&D Center Co., Ltd.
    Inventor: Hiroyuki Nakasuka
  • Patent number: 8046920
    Abstract: A razor is provided with a blade member 3 having a base and a blade body 4 on the base, a blade base member 5 arranged on the bottom side of the razor head 2, and a top member 6 arranged on the top side of the razor head 2. The blade member 3 is fitted between the blade base member 5 and the top member 6. The base is supported on the blade base member 5. A cutting edge 4a of the blade body 4 is exposed at the top member 6. The base is elastically supported by the leaf spring so as to move integrally against a pressing force from the skin surface when the blade body is caused to contact the skin surface. A contact pressure of the blade body 4 on the skin surface is restricted, thereby improving the shaving performance. Further, since a single-component blade member 3 having the blade body 4 on the base is fitted between the blade base member 5 and the top member 6, this simplifies the structure for elastically supporting the blade body 4 and allowing the blade body 4 to move.
    Type: Grant
    Filed: February 14, 2007
    Date of Patent: November 1, 2011
    Assignee: Kai R&D Center Co., Ltd.
    Inventor: Hiroyuki Nakasuka
  • Patent number: 7992304
    Abstract: A razor having a simplified structure is provided. This oscillating razor is provided with a razor head. The razor head is provided with a blade member composed of a base having a blade-body supporting portion and a plurality of blade bodies, a blade base member located on the back side of the razor head, and a top member located on the front side of the razor head. The blade member is fitted between the blade base member and the top member. The base is supported on the blade base member and the cutting edge of the blade body is exposed outward at the top member. Each of the blade bodies is placed on the blade-body supporting portion, and welded portions fixed to each other by welding from the side corresponding to the blade-body supporting portion are formed on the blade body and the blade-body supporting portion.
    Type: Grant
    Filed: February 14, 2007
    Date of Patent: August 9, 2011
    Assignee: Kai R&D Center Co., Ltd.
    Inventor: Hiroyuki Nakasuka
  • Patent number: 7971363
    Abstract: A head portion of a holder incorporates a pair of support arms, which oscillatably support a razor head, and a pusher, which is pressed against the razor head. The razor head includes a blade body with a cutting edge. The razor head is supported by the support arms at both ends in the extending direction of the cutting edge of the blade body. The razor head includes a pair of supported portions and a pair of contact portions. The support arms include first outer arm portions, which support the supported portions such that the razor head is rotatable in an oscillating direction. The pusher includes a pair of second outer arm portions formed on both ends in the extending direction of the cutting edge of the blade body. The second outer arm portions are pressed against the contact portions. At least part of each second outer arm portion is arranged in a region extending through the associated first outer arm portions in a direction perpendicular to a plane containing a contact direction of the pusher.
    Type: Grant
    Filed: August 29, 2006
    Date of Patent: July 5, 2011
    Assignee: Kai R&D Center Co., Ltd.
    Inventor: Hiroyuki Nakasuka
  • Patent number: 7877879
    Abstract: In a razor including a razor head 16 having blade bodies 19, a shaving aid member 27 is provided on the razor head 16. The shaving aid member 27 reciprocates between an initial position and an end position, which is separate from the initial position by a predetermined range. The shaving aid member 27 is urged toward the initial position by elastic bodies 31.
    Type: Grant
    Filed: August 29, 2006
    Date of Patent: February 1, 2011
    Assignee: Kai R&D Center Co., Ltd.
    Inventor: Hiroyuki Nakasuka
  • Publication number: 20100229397
    Abstract: A razor is provided with a blade member 3 having a base and a blade body 4 on the base, a blade base member 5 arranged on the back side of the razor head 2, and a top member 6 arranged on the front side of the razor head 2. The blade member 3 is fitted between the blade base member 5 and the top member 6. The base is supported on the blade base member 5. A cutting edge 4a of the blade body 4 is exposed at the top member 6. The base is elastically supported by the leaf spring so as to move integrally against a pressing force from the skin surface when the blade body is caused to contact the skin surface. A contact pressure of the blade body 4 on the skin surface is restricted, thereby improving the shaving performance. Further, since a single-component blade member 3 having the blade body 4 on the base is fitted between the blade base member 5 and the top member 6, this simplifies the structure for elastically supporting the blade body 4 and allowing the blade body 4 to move.
    Type: Application
    Filed: February 14, 2007
    Publication date: September 16, 2010
    Applicant: KAI R&D Center Co., Ltd.
    Inventor: Hiroyuki Nakasuka
  • Patent number: D632433
    Type: Grant
    Filed: April 26, 2010
    Date of Patent: February 8, 2011
    Assignee: Kai R & D Center Co., Ltd.
    Inventor: Hiroyuki Nakasuka