Patents by Inventor Igor TWELLAAR

Igor TWELLAAR 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).

  • Pivot hinge and pivotal door leaf
    Patent number: 12698661
    Abstract: A pivot hinge has a pivot pin member for pivotally connecting a pivotal door leaf with a structural element. The hinge comprising a first cam follower on a first side of the pivot pin member and a second cam follower on a second side of the pivot pin member opposite the first side, the first and second cam followers both being movable in a radial direction relative to the cam. A slidable reciprocating member is arranged within the casing and has first and second end parts rigidly connected to one another. The cam has a pair of recesses. The spring arrangement is arranged between the second cam follower and the second end part and urges both first and second cam followers against the cam and into the respective recess to provide a holding moment to retain the door leaf in a holding position.
    Type: Grant
    Filed: April 19, 2023
    Date of Patent: August 4, 2026
    Assignee: FRITSJURGENS HOLDING B.V.
    Inventors: Alexander Patje, Igor Twellaar, Hilde Seip, Martin Erwin Mulder, Durk Rovers
  • A PIVOT HINGE AND PIVOTAL DOOR LEAF
    Publication number: 20250263961
    Abstract: A pivot hinge has a pivot pin member for pivotally connecting a pivotal door leaf with a structural element. The hinge comprising a first cam follower on a first side of the pivot pin member and a second cam follower on a second side of the pivot pin member opposite the first side, the first and second cam followers both being movable in a radial direction relative to the cam. A slidable reciprocating member is arranged within the casing and has first and second end parts rigidly connected to one another. The cam has a pair of recesses. The spring arrangement is arranged between the second cam follower and the second end part and urges both first and second cam followers against the cam and into the respective recess to provide a holding moment to retain the door leaf in a holding position.
    Type: Application
    Filed: April 19, 2023
    Publication date: August 21, 2025
    Inventors: Alexander PATJE, Igor TWELLAAR, Hilde SEIP, Martin Erwin MULDER, Durk ROVERS