Patents by Inventor Leonid Shpigelman

Leonid Shpigelman 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: 20200198026
    Abstract: An end mill includes a plurality of teeth and flutes. The teeth and their associated flutes include one or more correlated physical parameters. One such correlated parameter is that, at an axial location in a front half of an effective cutting length, at least one tooth of the plurality of teeth has a rake angle smaller than an average rake angle value of the plurality of teeth, and, at the same axial location, a flute preceding each such tooth has a helix angle larger than an average helix angle value of the plurality of flutes.
    Type: Application
    Filed: March 5, 2020
    Publication date: June 25, 2020
    Applicant: Iscar, Ltd.
    Inventor: LEONID SHPIGELMAN
  • Patent number: 10618122
    Abstract: An end mill includes a plurality of teeth and flutes. The teeth and their associated flutes include one or more correlated physical parameters. One such correlated parameter is that, at an axial location in a front half of an effective cutting length, at least one tooth of the plurality of teeth has a rake angle smaller than an average rake angle value of the plurality of teeth, and, at the same axial location, a flute preceding each such tooth has a helix angle larger than an average helix angle value of the plurality of flutes.
    Type: Grant
    Filed: January 4, 2018
    Date of Patent: April 14, 2020
    Assignee: Iscar, Ltd.
    Inventor: Leonid Shpigelman
  • Patent number: 10486246
    Abstract: An end mill for shouldering and/or slotting applications includes at least one tooth including a cutting edge. The cutting edge includes a first sub-edge extending rearwardly from a cutting end face and a second sub-edge extending rearwardly from the first sub-edge. An angle transition intersection defines where the first sub-edge ends and the second sub-edge starts. The angle transition intersection is located generally between 20% to 75% of an effective cutting length from a cutting end face and more specifically at a location within the general location where there is an increase in the rake angle and/or a significant increase in the helix angle of the cutting edge.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: November 26, 2019
    Assignee: Iscar, Ltd.
    Inventors: Leonid Shpigelman, Alexander Koifman
  • Publication number: 20190262913
    Abstract: An end mill for shouldering and/or slotting applications includes at least one tooth including a cutting edge. The cutting edge includes a first sub-edge extending rearwardly from a cutting end face and a second sub-edge extending rearwardly from the first sub-edge. An angle transition intersection defines where the first sub-edge ends and the second sub-edge starts. The angle transition intersection is located generally between 20% to 75% of an effective cutting length from a cutting end face and more specifically at a location within the general location where there is an increase in the rake angle and/or a significant increase in the helix angle of the cutting edge.
    Type: Application
    Filed: February 26, 2018
    Publication date: August 29, 2019
    Applicant: Iscar, Ltd.
    Inventors: Leonid Shpigelman, Alexander Koifman
  • Patent number: 10131003
    Abstract: A corner radius end mill includes a tooth adjacent a helically extending flute. The tooth includes axial and radial relief surfaces connected by a corner relief surface, as well as rake surface having a rake ridge. The rake ridge is continuously curved from a bisector line until at least an axial location rearward of the corner relief surface.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: November 20, 2018
    Assignee: Iscar, Ltd.
    Inventor: Leonid Shpigelman
  • Patent number: 10040136
    Abstract: An end mill includes a plurality of teeth and flutes. The teeth and their associated flutes include one or more correlated physical parameters. One such correlated parameter is that, at an axial location in a front half of an effective cutting length, at least one tooth of the plurality of teeth has a rake angle smaller than an average rake angle value of the plurality of teeth, and, at the same axial location, a flute preceding each such tooth has a helix angle larger than an average helix angle value of the plurality of flutes.
    Type: Grant
    Filed: October 12, 2015
    Date of Patent: August 7, 2018
    Assignee: Iscar, Ltd.
    Inventor: Leonid Shpigelman
  • Publication number: 20180126469
    Abstract: An end mill includes a plurality of teeth and flutes. The teeth and their associated flutes include one or more correlated physical parameters. One such correlated parameter is that, at an axial location in a front half of an effective cutting length, at least one tooth of the plurality of teeth has a rake angle smaller than an average rake angle value of the plurality of teeth, and, at the same axial location, a flute preceding each such tooth has a helix angle larger than an average helix angle value of the plurality of flutes.
    Type: Application
    Filed: January 4, 2018
    Publication date: May 10, 2018
    Inventor: Leonid Shpigelman
  • Publication number: 20170144234
    Abstract: A corner radius end mill includes a tooth adjacent a helically extending flute. The tooth includes axial and radial relief surfaces connected by a corner relief surface, as well as rake surface having a rake ridge. The rake ridge is continuously curved from a bisector line until at least an axial location rearward of the corner relief surface.
    Type: Application
    Filed: November 23, 2015
    Publication date: May 25, 2017
    Inventor: Leonid SHPIGELMAN
  • Publication number: 20170100786
    Abstract: An end mill includes a plurality of teeth and flutes. The teeth and their associated flutes include one or more correlated physical parameters. One such correlated parameter is that, at an axial location in a front half of an effective cutting length, at least one tooth of the plurality of teeth has a rake angle smaller than an average rake angle value of the plurality of teeth, and, at the same axial location, a flute preceding each such tooth has a helix angle larger than an average helix angle value of the plurality of flutes.
    Type: Application
    Filed: October 12, 2015
    Publication date: April 13, 2017
    Inventor: Leonid SHPIGELMAN
  • Patent number: 9517515
    Abstract: An end mill includes a tooth having a convex radial relief surface, a corner with a circular arc profile, a rake surface and a corner relief surface. The corner relief surface extends rearward of a radial tangent plane defined in relation to the circular arc profile.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: December 13, 2016
    Assignee: Iscar, Ltd.
    Inventor: Leonid Shpigelman
  • Patent number: 9327353
    Abstract: An end mill having a plurality of teeth configured for both roughing and semi-finishing applications, the teeth being alternated with a plurality of flutes. At least one tooth of the plurality of cutting teeth is a serrated tooth formed with serrations along a relief surface thereof and at least one other tooth is free of serrations. Each tooth of the plurality of cutting teeth includes an actual internal cutting angle formed at an intersection of a rake cutting sub-surface and a relief surface. The actual internal cutting angle of each tooth has a greater value than an imaginary internal cutting angle formed at an intersection of imaginary extension lines of a rake recessed sub-surface and a relief surface of the same tooth.
    Type: Grant
    Filed: December 11, 2012
    Date of Patent: May 3, 2016
    Assignee: Iscar, Ltd.
    Inventors: Leonid Shpigelman, Eliyahu Budda, Alexander Khina
  • Publication number: 20160074947
    Abstract: An end mill includes a tooth having a convex radial relief surface, a corner with a circular arc profile, a rake surface and a corner relief surface. The corner relief surface extends rearward of a radial tangent plane defined in relation to the circular arc profile.
    Type: Application
    Filed: September 15, 2014
    Publication date: March 17, 2016
    Applicant: Iscar, Ltd.
    Inventor: Leonid SHPIGELMAN
  • Patent number: 9174287
    Abstract: A rotary cutting tool, having a longitudinal axis, includes cutting and mounting portions. The cutting portion includes an end face surface and a peripheral surface extending therefrom. The peripheral surface includes respective pluralities of main and auxiliary flutes that extend helically with opposite hand about the longitudinal axis. The cutting portion includes a plurality of evenly circumferentially distributed end gashes and a plurality of end face cutting teeth. The number of main flutes and auxiliary flutes are different, each being wholly divisible by, and greater than, the number of end face cutting teeth. In each cross sectional view of the cutting portion an imaginary contour line defined by a peripheral contour of the peripheral surface of one of the end face cutting teeth is in rotationally aligned relationship, about the longitudinal axis, with the peripheral contour of the peripheral surfaces of all other end face cutting teeth.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: November 3, 2015
    Assignee: Iscar, Ltd.
    Inventors: Leonid Shpigelman, Igor Segal
  • Publication number: 20150147127
    Abstract: A rotary cutting tool, having a longitudinal axis, includes cutting and mounting portions. The cutting portion includes an end face surface and a peripheral surface extending therefrom. The peripheral surface includes respective pluralities of main and auxiliary flutes that extend helically with opposite hand about the longitudinal axis. The cutting portion includes a plurality of evenly circumferentially distributed end gashes and a plurality of end face cutting teeth. The number of main flutes and auxiliary flutes are different, each being wholly divisible by, and greater than, the number of end face cutting teeth. In each cross sectional view of the cutting portion an imaginary contour line defined by a peripheral contour of the peripheral surface of one of the end face cutting teeth is in rotationally aligned relationship, about the longitudinal axis, with the peripheral contour of the peripheral surfaces of all other end face cutting teeth.
    Type: Application
    Filed: November 27, 2013
    Publication date: May 28, 2015
    Applicant: Iscar, Ltd.
    Inventors: Leonid Shpigelman, Igor Segal
  • Publication number: 20140161546
    Abstract: An end mill having a plurality of teeth configured for both roughing and semi-finishing applications, the teeth being alternated with a plurality of flutes. At least one tooth of the plurality of cutting teeth is a serrated tooth formed with serrations along a relief surface thereof and at least one other tooth is free of serrations. Each tooth of the plurality of cutting teeth includes an actual internal cutting angle formed at an intersection of a rake cutting sub-surface and a relief surface. The actual internal cutting angle of each tooth has a greater value than an imaginary internal cutting angle formed at an intersection of imaginary extension lines of a rake recessed sub-surface and a relief surface of the same tooth.
    Type: Application
    Filed: December 11, 2012
    Publication date: June 12, 2014
    Applicant: Iscar, Ltd.
    Inventors: Leonid Shpigelman, Eliyahu Budda, Alexander Khina