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).
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Patent number: 11279053Abstract: 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: GrantFiled: April 27, 2015Date of Patent: March 22, 2022Assignee: KAI R&D CENTER CO., LTD.Inventors: Michael Lessmann, Jens Treu, Kesen Zeng, Yvonne Neumann, Hiroyuki Nakasuka
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Patent number: 10807258Abstract: 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: GrantFiled: July 24, 2015Date of Patent: October 20, 2020Assignee: BEIERSDORF AGInventors: Michael Lessmann, Jens Treu, Kesen Zeng, Yvonne Neumann, Hiroyuki Nakasuka, Ralf Hagens, Philip Drescher
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Patent number: 10717202Abstract: 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: GrantFiled: July 24, 2015Date of Patent: July 21, 2020Assignee: BEIERSDORF AGInventors: Michael Lessmann, Jens Treu, Kesen Zeng, Yvonne Neumann, Hiroyuki Nakasuka, Ralf Hagens, Philip Drescher
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Patent number: 10391653Abstract: 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: GrantFiled: April 27, 2015Date of Patent: August 27, 2019Assignee: BEIERSDORF AGInventors: Michael Lessmann, Jens Treu, Kesen Zeng, Yvonne Neumann, Hiroyuki Nakasuka, Ralf Hagens, Philip Drescher
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Patent number: 10252432Abstract: 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: GrantFiled: July 29, 2015Date of Patent: April 9, 2019Assignee: KAI R&D CENTER CO., LTD.Inventor: Hiroyuki Nakasuka
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Publication number: 20180079094Abstract: 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: ApplicationFiled: July 24, 2015Publication date: March 22, 2018Inventors: Michael LESSMANN, Jens TREU, Kesen ZENG, Yvonne NEUMANN, Hiroyuki NAKASUKA, Ralf HAGENS, Philip DRESCHER
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Publication number: 20170232625Abstract: 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: ApplicationFiled: April 27, 2015Publication date: August 17, 2017Inventors: Michael LESSMANN, Jens TREU, Kesen ZENG, Yvonne NEUMANN, Hiroyuki NAKASUKA, Ralf HAGENS, Philip DRESCHER
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Publication number: 20170225344Abstract: 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: ApplicationFiled: July 24, 2015Publication date: August 10, 2017Inventors: Michael LESSMANN, Jens TREU, Kesen ZENG, Yvonne NEUMANN, Hiroyuki NAKASUKA, Ralf HAGENS, Philip DRESCHER
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Publication number: 20170217034Abstract: 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: ApplicationFiled: April 27, 2015Publication date: August 3, 2017Inventors: Michael LESSMANN, Jens TREU, Kesen ZENG, Yvonne NEUMANN, Hiroyuki NAKASUKA
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Publication number: 20170203452Abstract: 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: ApplicationFiled: July 29, 2015Publication date: July 20, 2017Inventor: HIROYUKI NAKASUKA
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Patent number: 9498892Abstract: 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: GrantFiled: May 15, 2012Date of Patent: November 22, 2016Assignee: KAI R&D CENTER CO., LTD.Inventors: Hiroyuki Nakasuka, Daisuke Haba
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Publication number: 20140096402Abstract: 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: ApplicationFiled: May 15, 2012Publication date: April 10, 2014Applicant: KAI R&D CENTER CO., LTD.Inventors: Hiroyuki Nakasuka, Daisuke Haba
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Patent number: 8166658Abstract: 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: GrantFiled: October 26, 2007Date of Patent: May 1, 2012Assignee: KAI R&D Center Co., Ltd.Inventor: Hiroyuki Nakasuka
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Patent number: 8104179Abstract: 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: GrantFiled: February 14, 2007Date of Patent: January 31, 2012Assignee: Kai R&D Center Co., Ltd.Inventor: Hiroyuki Nakasuka
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Patent number: 8046920Abstract: 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: GrantFiled: February 14, 2007Date of Patent: November 1, 2011Assignee: Kai R&D Center Co., Ltd.Inventor: Hiroyuki Nakasuka
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Patent number: 7992304Abstract: 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: GrantFiled: February 14, 2007Date of Patent: August 9, 2011Assignee: Kai R&D Center Co., Ltd.Inventor: Hiroyuki Nakasuka
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Patent number: 7971363Abstract: 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: GrantFiled: August 29, 2006Date of Patent: July 5, 2011Assignee: Kai R&D Center Co., Ltd.Inventor: Hiroyuki Nakasuka
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Patent number: 7877879Abstract: 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: GrantFiled: August 29, 2006Date of Patent: February 1, 2011Assignee: Kai R&D Center Co., Ltd.Inventor: Hiroyuki Nakasuka
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Publication number: 20100229397Abstract: 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: ApplicationFiled: February 14, 2007Publication date: September 16, 2010Applicant: KAI R&D Center Co., Ltd.Inventor: Hiroyuki Nakasuka
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Patent number: D632433Type: GrantFiled: April 26, 2010Date of Patent: February 8, 2011Assignee: Kai R & D Center Co., Ltd.Inventor: Hiroyuki Nakasuka