Patents by Inventor Jiri Vodnansky

Jiri Vodnansky 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).

  • Method and apparatus for spreading monomer mixtures in molds for the centrifugal casting of contact lenses
    Patent number: 4722813
    Abstract: A method and apparatus are provided for spreading monomer mixture in molds for the centrifugal casting of contact lenses, wherein the said molds containing a monomer mixture are rotated around their axis with the frequency 0.5 to 5 revolutions per minute and, at the same time, the axis of molds is periodically tilted between extreme positions, the angle to the vertical direction of which is in the first extreme position 30.degree. to 60.degree. and in the second extreme position 70.degree. to 100.degree. and the frequency of tilting is twice to ten times lower than the frequency of rotation.
    Type: Grant
    Filed: January 14, 1985
    Date of Patent: February 2, 1988
    Assignee: Ceskoslovenska akademie ved
    Inventors: Otto Wichterle, Jiri Vodnansky
  • Method and apparatus with automatic feed means for centrifugally casting articles
    Patent number: 4568501
    Abstract: A centrifugal casting device employing a rotatable polymerization column adapted to accommodate a plurality of vertically aligned molds and a rotatable mold-dispensing magazine disposed at an angle .alpha. to the polymerization column and adapted to dispense molds one at a time into the polymerization column.
    Type: Grant
    Filed: April 6, 1984
    Date of Patent: February 4, 1986
    Assignee: Ceskoslovenska Akademie Ved
    Inventors: Otto Wichterle, Jiri Vodnansky, Vladimir Havlin