Patents by Inventor Ryan C. Lin

Ryan C. Lin 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: 9806580
    Abstract: A step motor integrates its mounting face and heat sink into the stator design. In particular, mounting holes (typically, four in number) are provided through the stator stack in outer perimeter areas. The stator stack itself becomes the mounting surface, allowing the heat generated from the stator to conduct directly to the mounting plate. The front end cap for holding the rotor in alignment is situated inside of the stator's mounting surface and takes no part in mounting the motor to the mounting surface. The end caps only hold the rotor in proper relation within the stator and contain the bearing assembly for the rotor's axial drive shaft. The perimeter of the stator assembly between the mounting screw holes may have saw-tooth cutouts that define heat-dissipation fins.
    Type: Grant
    Filed: August 14, 2015
    Date of Patent: October 31, 2017
    Assignee: Lin Engineering, Inc.
    Inventors: Ted T. Lin, Richard L. Badgerow, Ryan C. Lin
  • Publication number: 20160049843
    Abstract: A step motor integrates its mounting face and heat sink into the stator design. In particular, mounting holes (typically, four in number) are provided through the stator stack in outer perimeter areas. The stator stack itself becomes the mounting surface, allowing the heat generated from the stator to conduct directly to the mounting plate. The front end cap for holding the rotor in alignment is situated inside of the stator's mounting surface and takes no part in mounting the motor to the mounting surface. The end caps only hold the rotor in proper relation within the stator and contain the bearing assembly for the rotor's axial drive shaft. The perimeter of the stator assembly between the mounting screw holes may have saw-tooth cutouts that define heat-dissipation fins.
    Type: Application
    Filed: August 14, 2015
    Publication date: February 18, 2016
    Applicant: LIN ENGINEERING
    Inventors: Ted T. Lin, Richard L. Badgerow, Ryan C. Lin
  • Patent number: 8283841
    Abstract: A rotary machine (e.g., motor or generator) has end caps with plastic piloting rings that engage a stator's plastic winding frame in an interference fit, so that a rotor seated by bearings in the end caps is properly aligned with the stator. The flexibility of the plastic-to-plastic fit allows looser tolerances in comparison to machining of all-metal end caps, while the average circle of the piloting ring's outer diameter still assures proper concentricity of rotor shaft, bearings, piloting rings and stator.
    Type: Grant
    Filed: June 23, 2010
    Date of Patent: October 9, 2012
    Assignee: Lin Engineering
    Inventors: Ted T. Lin, Ryan C. Lin
  • Publication number: 20110316364
    Abstract: A rotary machine (e.g., motor or generator) has end caps with plastic piloting rings that engage a stator's plastic winding frame in an interference fit, so that a rotor seated by bearings in the end caps is properly aligned with the stator. The flexibility of the plastic-to-plastic fit allows looser tolerances in comparison to machining of all-metal end caps, while the average circle of the piloting ring's outer diameter still assures proper concentricity of rotor shaft, bearings, piloting rings and stator.
    Type: Application
    Filed: June 23, 2010
    Publication date: December 29, 2011
    Applicant: LIN ENGINEERING, INC.
    Inventors: Ted T. Lin, Ryan C. Lin
  • Publication number: 20080169731
    Abstract: A hybrid step motor creates additional detent positions between successive drive phases of the motor for smooth motion and micro-step accuracy. A multi-section rotor has two sets of rotor sections that are displaced by the standard one-half rotor tooth pitch plus-or-minus an additional displacement angle equal to one-quarter of the fundamental step angle. The motor can also employ a stator in which two groups of teeth on the stator poles are displaced from the standard stator tooth pitch by an amount selected to create even more detent positions.
    Type: Application
    Filed: January 11, 2007
    Publication date: July 17, 2008
    Inventors: Ted T. Lin, Ryan C. Lin
  • Patent number: 6969930
    Abstract: A half-stepping motor with bifilar coil windings about its stator poles has two layers of stator coils with different numbers of turns per pole for each layer. The ratio between the number turns is selected to provide a desired angular phase shift in the torque profile. A first layer wound about a first group of poles is connected in series in a forward sense with a second layer wound about a second distinct group of poles and driven by a first phase, while a second layer wound about the first group of poles is connected in series in a reverse sense with a first layer wound about the second group of poles and driven by a second phase in quadrature relation to the first phase. For a motor with 8 stator poles, the desired phase shift is 22.5 degrees, resulting from a turn ratio between the layers of about 0.4142.
    Type: Grant
    Filed: July 28, 2004
    Date of Patent: November 29, 2005
    Inventors: Ted T. Lin, Ryan C. Lin
  • Patent number: 6597077
    Abstract: A two-phase step motor with bifilar winding around the stator poles is connected to phases &agr; and &bgr; (90° apart) of a two-phase driver in a manner that maximizes torque at medium speed operation and minimizes vibrations. In particular, the coils that are wound around different groups of stator poles are connected in series. In one set, both coils are connected in a forward sense around the stator, while in the other set, the two coils are connected in opposite senses. All coils are energized in every phase of a pulse cycle. The properties are intermediate between that of convention series and parallel stator coil connections.
    Type: Grant
    Filed: November 29, 2001
    Date of Patent: July 22, 2003
    Inventors: Ted T. Lin, Ryan C. Lin
  • Publication number: 20030102760
    Abstract: A two-phase step motor with bifilar winding around the stator poles is connected to phases &agr; and &bgr; (90° apart) of a two-phase driver in a manner that maximizes torque at medium speed operation and minimizes vibrations. In particular, the coils that are wound around different groups of stator poles are connected in series. In one set, both coils are connected in a forward sense around the stator, while in the other set, the two coils are connected in opposite senses. All coils are energized in every phase of a pulse cycle. The properties are intermediate between that of convention series and parallel stator coil connections.
    Type: Application
    Filed: November 29, 2001
    Publication date: June 5, 2003
    Inventors: Ted T. Lin, Ryan C. Lin
  • Patent number: 6114782
    Abstract: Disclosed is a stator of 2-phase step motor that has 4 stator coils, two in each phase. The coils are wound around 8 stator poles in a standard bifilar winding pattern. The first center-tap of the first phase and the second center tap of the second phase are connected. One end of the first phase makes a first terminal. One end of the second phase makes a second terminal. The other end of the first phase and the other end of the second phase are connected to make a third terminal. A three-phase driver can drive the step motor via these three terminals. Performance of the stator of the step motor can be improved by increasing the number of turns of the two coils whose ends make the first and second terminals. Then the three phase resistances of the stator can be adjusted to have similar resistances by reducing the wire gauge of the other two coils. This reduction of the wire size compensates for the space needed for the increase in the numbers of coil turns mentioned above.
    Type: Grant
    Filed: September 30, 1999
    Date of Patent: September 5, 2000
    Inventors: Ted T. Lin, Ryan C. Lin