Patents Assigned to Izumi Products Company
  • Patent number: 10357889
    Abstract: An inner blade of a rotary electric shaver decreases a rake angle and increases an erecting angle in a small blade, which can prevent remaining hair from appearing on one end side in a cross section of hair, and which can prevent poor shaving performance and increased sliding resistance against an outer blade. An inner blade of a rotary electric shaver includes an outer blade whose upper surface functions as an annular shaving surface having multiple hair inlets, and the inner blade having a plurality of small blades which rotate while coming into sliding contact with a lower surface of the outer blade.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: July 23, 2019
    Assignee: IZUMI PRODUCTS COMPANY
    Inventors: Koichi Odagiri, Yoshiyuki Mimura
  • Patent number: 10195751
    Abstract: A rotary electric shaver includes a gear case arranged inside a head unit, a lower gear arranged in a lower portion of the gear case, coaxially having an outer blade gear for driving an outer blade and an inner blade gear for driving an inner blade, an upper gear arranged in an upper portion of the gear case to drive the outer blade, and a transmission gear having an input gear arranged in the lower portion of the gear case and to which driving power is input from the lower gear, and an output gear arranged in the upper portion of the gear case to drive the upper gear, in which the input gear and the output gear are coaxial and a rotary shaft vertically penetrates the gear case. The driving power from the upper gear drives an outer blade drive gear for driving the outer blade.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: February 5, 2019
    Assignee: IZUMI PRODUCTS COMPANY
    Inventor: Tetsuhiko Shimizu
  • Publication number: 20180361600
    Abstract: A rotary electric shaver includes an outer cutter which has an upper surface with annular shaving faces, in which many hair-entry apertures are formed, and an inner cutter having small blades, which rotate in sliding contact with the lower surface of the outer cutter from below the shaving faces. The outer cutter (10) has a plurality of concentric annular shaving faces (16, 18), which are integrally formed therewith. The density of the hair-entry apertures (65) is varied in the circumferential direction of the plurality of annular shaving faces (16, 18). The rotary electric shaver increases the shaving area of the outer cutter to improve shaving efficiency and also restrains excessively close shaving thereby to protect skin even when the contact pressure of an area near the center of the outer cutter against skin increases.
    Type: Application
    Filed: August 27, 2018
    Publication date: December 20, 2018
    Applicant: IZUMI PRODUCTS COMPANY
    Inventors: Tsuyoshi NAKANO, Yoshiyuki MIMURA
  • Publication number: 20180015621
    Abstract: An inner blade of a rotary electric shaver decreases a rake angle and increases an erecting angle in a small blade, which can prevent remaining hair from appearing on one end side in a cross section of hair, and which can prevent poor shaving performance and increased sliding resistance against an outer blade. An inner blade of a rotary electric shaver includes an outer blade whose upper surface functions as an annular shaving surface having multiple hair inlets, and the inner blade having a plurality of small blades which rotate while coming into sliding contact with a lower surface of the outer blade.
    Type: Application
    Filed: February 24, 2015
    Publication date: January 18, 2018
    Applicant: IZUMI PRODUCTS COMPANY
    Inventors: Koichi ODAGIRI, Yoshiyuki MIMURA
  • Patent number: 9789616
    Abstract: A rotary electric shaver includes a blade unit which has an outer blade with multiple hair inlets formed therein and an inner blade which rotates while coming into sliding contact with a lower surface of the outer blade. The inner blade has multiple small blades, and the small blades are formed in a shape in which rake angles of a blade edge are a small angle and a large angle depending on the radial position.
    Type: Grant
    Filed: May 21, 2015
    Date of Patent: October 17, 2017
    Assignee: IZUMI PRODUCTS COMPANY
    Inventor: Yoshiyuki Mimura
  • Patent number: 9731411
    Abstract: A hydraulic tool having a body, a frame in which a stationary tool for machining a workpiece and a movable tool are disposed, a cylindrical piston, and a rapid-advance piston connected to the body, wherein the rapid-advance piston has a barrel part being in contact with the piston, a connection part disposed at the rear end of the barrel part and connected to the body, a screw part formed in the connection part, and a D-cut face formed on the barrel part. A fixation member disposed in the body so as to be positioned in the vicinity of the D-cut face is also provided. The D-cut face is formed along a direction orthogonal to a line that connects the center point of the barrel part to the center point of the fixation member, and the rapid-advance piston is prevented from rotating by the fixation member.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: August 15, 2017
    Assignee: Izumi Products Company
    Inventors: Takeshi Uchiyama, Tomoyuki Kitahara
  • Publication number: 20170217030
    Abstract: A rotary electric shaver of the present invention includes: an outer blade having an annular shaving surface provided with multiple hair inlets formed therein on an upper surface thereof; and an inner blade having a small blade which rotates in sliding contact with a lower surface of the outer blade, in which the outer blade has an integral structure using a resin material, and has a rib portion which is located between adjacent hair inlets.
    Type: Application
    Filed: December 29, 2016
    Publication date: August 3, 2017
    Applicant: IZUMI PRODUCTS COMPANY
    Inventor: Yoshiyuki MIMURA
  • Publication number: 20170144317
    Abstract: A rotary electric shaver according to the present invention includes an outer blade whose upper surface functions as annular shaving surfaces having multiple hair inlets formed therein, and an inner blade that has a small blade which rotates while coming into sliding contact with a lower surface of the outer blade. The inner blade is an integral structure using a metal material, and has a projection in which an upper surface side is a convex portion and a lower surface side is a concave portion at a center position in a radial direction. An upper end portion of an inner blade drive shaft directly engages with the concave portion so as to be disengageable therefrom.
    Type: Application
    Filed: September 14, 2016
    Publication date: May 25, 2017
    Applicant: Izumi Products Company
    Inventor: Tetsuhiko SHIMIZU
  • Patent number: 9649772
    Abstract: In a rotary electric shaver according to the present invention, a plurality of blade units that include an outer blade having an annular shaving surface on an upper surface and an inner blade rotating in sliding contact with a lower surface of the outer blade are arranged in a head unit held by a main body so as to be tiltable. A main drive shaft outputting drive force of a motor accommodated in the main body and a rotary shaft of any one blade unit out of the plurality of blade units are connected by a movable joint, and a position of the movable joint serves as a tilting fulcrum for tilting the head unit.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: May 16, 2017
    Assignee: IZUMI PRODUCTS COMPANY
    Inventor: Tetsuhiko Shimizu
  • Publication number: 20170120465
    Abstract: A rotary electric shaver includes an outer blade whose upper surface functions as annular shaving surfaces having multiple hair inlets formed therein, and an inner blade that has a small blade which rotates while coming into sliding contact with a lower surface of the outer blade. The small blade is formed so that an inner blade base plate is partially erected, and is disposed in at least two rows on a circumference close to an outer periphery and on a circumference close to an inner periphery. There is provided a movable inner blade that has a movable small blade which is vertically movable along a front end surface in a rotation direction of the small blade, with respect to the predetermined small blade.
    Type: Application
    Filed: September 13, 2016
    Publication date: May 4, 2017
    Applicant: Izumi Products Company
    Inventors: Tetsuhiko SHIMIZU, Yoshiyuki MIMURA
  • Publication number: 20170008179
    Abstract: A rotary electric shaver includes a gear case arranged inside a head unit, a lower gear arranged in a lower portion of the gear case, coaxially having an outer blade gear for driving an outer blade and an inner blade gear for driving an inner blade, an upper gear arranged in an upper portion of the gear case to drive the outer blade, and a transmission gear having an input gear arranged in the lower portion of the gear case and to which driving power is input from the lower gear, and an output gear arranged in the upper portion of the gear case to drive the upper gear, in which the input gear and the output gear are coaxial and a rotary shaft vertically penetrates the gear case. The driving power from the upper gear drives an outer blade drive gear for driving the outer blade.
    Type: Application
    Filed: June 17, 2016
    Publication date: January 12, 2017
    Applicant: Izumi Products Company
    Inventor: Tetsuhiko SHIMIZU
  • Patent number: 9533421
    Abstract: In a reciprocating-type electric shaver, an inner blade has an attachment groove which is open downward in a lower end of a side edge. An inner peripheral portion of the attachment groove has an engagement groove which is recessed in an in-plane direction on a wall surface of the side edge and in a longitudinal direction of the inner blade. An inner blade base has a projection at a position corresponding to the attachment groove. The projection can be elastically deformed in the in-plane direction on the wall surface of the side edge and in the longitudinal direction of the inner blade, and is formed so that an engagement claw disposed in a distal end of the projection can enter and engage with the engagement groove. The engagement claw engages with the engagement groove, thereby causing the inner blade to be fixed to the inner blade base.
    Type: Grant
    Filed: December 1, 2014
    Date of Patent: January 3, 2017
    Assignee: IZUMI PRODUCTS COMPANY
    Inventor: Tetsuhiko Shimizu
  • Publication number: 20160368128
    Abstract: A hydraulic tool having a body, a frame in which a stationary tool for machining a workpiece and a movable tool are disposed, a cylindrical piston, and a rapid-advance piston connected to the body, wherein the rapid-advance piston has a barrel part being in contact with the piston, a connection part disposed at the rear end of the barrel part and connected to the body, a screw part formed in the connection part, and a D-cut face formed on the barrel part. A fixation member disposed in the body so as to be positioned in the vicinity of the D-cut face is also provided. The D-cut face is formed along a direction orthogonal to a line that connects the center point of the barrel part to the center point of the fixation member, and the rapid-advance piston is prevented from rotating by the fixation member.
    Type: Application
    Filed: December 10, 2013
    Publication date: December 22, 2016
    Applicant: IZUMI PRODUCTS COMPANY
    Inventors: Takeshi UCHIYAMA, Tomoyuki KITAHARA
  • Publication number: 20160276117
    Abstract: An electric tool capable of preventing unintentional driving from being performed is provided. An electric tool of the invention is an electric tool configured to be driven by electricity, and includes a switch knob configured to turn a driving power source ON by being pressed, wherein the switch knob is provided with a lock plate fixed so as to be slidable between a first position coming into abutment with a predetermined portion of a body portion of the electric tool and a second position not coming into abutment with the body portion when the switch knob is pressed.
    Type: Application
    Filed: March 3, 2016
    Publication date: September 22, 2016
    Applicant: IZUMI PRODUCTS COMPANY
    Inventor: Hiroyuki YAJIMA
  • Patent number: 9364960
    Abstract: A rotary electric shaver with an outer cutter having a circular shaving top surface with numerous hair introduction openings and an inner cutter having a small cutter slidably rotating in contact with a bottom surface of the outer cutter. The rotary electric shaver includes an outer cutter set wherein the outer cutter is assembled in an outer cutter holding unit and an inner cutter set wherein the inner cutter is assembled in an inner cutter holding unit. The outer cutter set and the inner cutter set are respectively provided with a positioning convex portion on one and a positioning concave portion on the other. The positioning convex portion can fit in the positioning concave portion such that the outer cutter set can be assembled with the inner cutter set only in a case where the outer cutter set and the inner cutter set are in a predetermined assembly position.
    Type: Grant
    Filed: December 12, 2013
    Date of Patent: June 14, 2016
    Assignee: IZUMI PRODUCTS COMPANY
    Inventors: Toshihiko Ohara, Hideaki Koike, Toshihide Miyasaka
  • Patent number: D767960
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: October 4, 2016
    Assignee: IZUMI PRODUCTS COMPANY
    Inventor: Isao Haneishi
  • Patent number: D832670
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: November 6, 2018
    Assignee: IZUMI PRODUCTS COMPANY
    Inventor: Takeshi Uchiyama
  • Patent number: D845733
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: April 16, 2019
    Assignee: IZUMI PRODUCTS COMPANY
    Inventor: Hiroyuki Yajima
  • Patent number: D845734
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: April 16, 2019
    Assignee: IZUMI PRODUCTS COMPANY
    Inventor: Keiichiro Kamijo
  • Patent number: D858237
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: September 3, 2019
    Assignee: IZUMI PRODUCTS COMPANY
    Inventor: Isao Haneishi