Patents by Inventor Norbert Derntl

Norbert Derntl 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).

  • Patent number: 6484763
    Abstract: A device for transporting fluids, such as viscous adhesives and sealants. The device includes a cylinder which may be filled by a supply line and a movable piston within the cylinder for ejecting the fluid into a discharge line. The piston includes an axial fluid channel and can be moved by way of a piston rod which also includes an axial fluid channel. An inlet valve is positioned between the supply line and the cylinder and may be moved between open and closed positions for releasing or interrupting the supply the fluid from the supply line into the interior of the cylinder. The piston rod includes threading and this threading is engaged with corresponding threading on a rotatable and drivable drive element so that the piston may be moved by rotating the drive element within the cylinder.
    Type: Grant
    Filed: February 14, 2000
    Date of Patent: November 26, 2002
    Assignee: Nordson Corporation
    Inventor: Norbert Derntl