Patents by Inventor John Halinski

John Halinski 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).

  • Magnetic stirring apparatus having low rotational speeds
    Patent number: 6962433
    Abstract: A magnetic stirring apparatus for achieving low rotational speeds is provided. The apparatus including a base for supporting a vessel containing a magnetic stir bar and a liquid to be stirred; a magnetic field generator for generating a rotating magnetic field to rotate the stir bar about an axis, the magnetic field generator including a plurality of coil pairs formed substantially in a circular manner, each coil of each pair being located diametrically opposite the other coil of the pair; a plurality of wedge-shaped tabs, each tab being coupled to a coil by a core, the wedge-shaped tabs forming a substantially circular plate; and a sine wave current generator for exciting each of the plurality of coil pairs by a predetermined phase shift resulting in the rotating magnetic field traveling along a circumference of the circular plate.
    Type: Grant
    Filed: January 30, 2003
    Date of Patent: November 8, 2005
    Assignee: Scientific Industries, Inc.
    Inventors: Robert P. Nichols, John Halinski
  • Magnetic stirring apparatus having low rotational speeds
    Publication number: 20040151065
    Abstract: A magnetic stirring apparatus for achieving low rotational speeds is provided. The apparatus including a base for supporting a vessel containing a magnetic stir bar and a liquid to be stirred; a magnetic field generator for generating a rotating magnetic field to rotate the stir bar about an axis, the magnetic field generator including a plurality of coil pairs formed substantially in a circular manner, each coil of each pair being located diametrically opposite the other coil of the pair; a plurality of wedge-shaped tabs, each tab being coupled to a coil by a core, the wedge-shaped tabs forming a substantially circular plate; and a sine wave current generator for exciting each of the plurality of coil pairs by a predetermined phase shift resulting in the rotating magnetic field traveling along a circumference of the circular plate.
    Type: Application
    Filed: January 30, 2003
    Publication date: August 5, 2004
    Applicant: SCIENTIFIC INDUSTRIES, INC.
    Inventors: Robert P. Nichols, John Halinski