Patents by Inventor Preben K. Larsen

Preben K. Larsen 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).

  • Multi-part piston for servomotor
    Patent number: 4981070
    Abstract: A servomotor is actuated by a pressure medium and has a piston reciprocated in the cylinder, the piston being mounted by a piston rod that extends through a cylinder end wall. The piston has a piston member bearing against the cylinder and is mounted for radial movement relative to the piston rod by a pair of piston guide plates that extend on opposite sides of the piston member. The guide plates are mounted by the piston rod for axial movement therewith.
    Type: Grant
    Filed: December 27, 1988
    Date of Patent: January 1, 1991
    Assignee: Danfoss A/S
    Inventor: Preben K. Larsen