Patents by Inventor Bert Poort

Bert Poort 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).

  • Vacuum vice for bowling balls
    Patent number: 5634749
    Abstract: A vacuum vice for holding a bowling ball when drilling holes or engraving the ball includes inner and outer o-rings seals which form inner and outer concentric vacuum chambers that work together to form a seal with a bowling ball having surface imperfections or engraving. The inner vacuum chamber holds the ball against the inner seal and a vacuum passageway applies the vacuum to the outer vacuum chamber which seats the ball against the outer seal.
    Type: Grant
    Filed: October 21, 1994
    Date of Patent: June 3, 1997
    Assignee: Jerry Liem
    Inventors: David Edis, Bert Poort
  • Vacuum vice for bowling balls and method
    Patent number: 5607268
    Abstract: A vacuum vice for holding a bowling ball when drilling holes or engraving the ball includes inner and outer o-rings seals which form two vacuum chambers that work together to form a seal with a bowling ball having surface imperfections or engraving. The inner vacuum chamber holds the ball to a buoyant cup. The outer vacuum chamber seats the ball against a contoured, hard rim surface and is connected by a leakage path around the inner seal to a piston chamber which pulls on the buoyant cup to further seat the ball. The outer seal is mounted on a movable housing that automatically adjusts to the size of the ball.
    Type: Grant
    Filed: November 22, 1994
    Date of Patent: March 4, 1997
    Assignee: Jerry Liem
    Inventors: David Edis, Bert Poort
  • Vacuum vice for bowling balls
    Patent number: 5409334
    Abstract: A vacuum vice for holding a bowling ball when drilling holes or engraving the ball includes inner and outer o-rings seals which form two vacuum chambers that work together to form a seal with a bowling ball having surface imperfections or engraving. The inner vacuum chamber holds the ball to a buoyant cup. The outer vacuum chamber seats the ball against a contoured, hard rim surface and is connected by a leakage path around the inner seal to a piston chamber which pulls on the buoyant cup to further seat the ball. The outer seal is mounted on a movable housing that automatically adjusts to the size of the ball.
    Type: Grant
    Filed: August 26, 1994
    Date of Patent: April 25, 1995
    Assignee: David Edis
    Inventors: David Edis, Bert Poort