Patents by Inventor Stefan Albert Johan FOLMER

Stefan Albert Johan FOLMER 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).

  • ELECTROMAGNETIC ACTUATOR AND VALVE HAVING THE ELECTROMAGNETIC ACTUATOR
    Publication number: 20230420170
    Abstract: There is provided electromagnetic actuator. The electromagnetic actuator comprises a mover, a tubular coil and a tubular coil holder. The mover has a magnet. The tubular coil holder holds the tubular coil. The tubular coil holder has a cylindrical inner space for receiving the mover. The tubular coil and the magnet are configured to cooperate with each other to generate a force to move the mover relative to the coil holder along an axial axis. The mover comprises a ferromagnetic element arranged to change an inductance of the tubular coil in dependency on a position of the mover relative to the tubular coil holder. Further, there is provided a valve for opening and closing a conduit. The valve comprises the electromagnetic actuator.
    Type: Application
    Filed: November 4, 2021
    Publication date: December 28, 2023
    Inventors: Johannes Adrianus Antonius Theodorus DAMS, Rob Leonardus Hubertus SANDERS, Stefan Albert Johan FOLMER