Patents by Inventor Folke Lennart Röllgårdh

Folke Lennart Röllgårdh 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: 6691605
    Abstract: A pressure medium actuated piston-cylinder device comprises at least one magnetically activated sensor (20) for detecting the piston position and which is adjustably attached to the cylinder (10) for indicating, both optically and electrically any desired piston position, wherein the sensor or sensors (20) are mounted in at least one longitudinal channel (17) on the outside of the cylinder (10), and one or more clamping spindles (21) are rotatively supported in and extending throughout the length of the channels (17) and arranged to be rotatively shifted by an activating mechanism (23) between a sensor (20) arresting position and a sensor (20) releasing position.
    Type: Grant
    Filed: July 3, 2002
    Date of Patent: February 17, 2004
    Assignee: Parker Hannifin AB
    Inventor: Folke Lennart Röllgårdh
  • Patent number: 6612221
    Abstract: A pressure medium activated piston-cylinder device comprises a cylinder with two end walls both having pressure medium communication ports, a piston movably guided in the cylinder and connected to a piston rod which extends out of the cylinder through a sealed-off passageway in a first one of the end walls, and a piston rod locking device located in the passageway and including a clamping element axially locked to the first end wall, and an activating member which is continuously spring biased toward a clamping element activating position and shiftable by pressure medium toward a release position, against the spring bias force, wherein a manually operable release mechanism comprises a tubular thrust element movable in the first end wall between a rest position and an activating member releasing position, and a maneuver spindle having a cam surface for co-operation with a cam surface on the thrust element for moving the thrust element between its rest position and the activating member releasing position as th
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: September 2, 2003
    Assignee: Parker Hannifin AB
    Inventor: Folke Lennart Röllgårdh
  • Publication number: 20030010192
    Abstract: A pressure medium actuated piston-cylinder device comprises at least one magnetically activated sensor (20) for detecting the piston position and which is adjustably attached to the cylinder (10) for indicating, both optically and electrically any desired piston position, wherein the sensor or sensors (20) are mounted in at least one longitudinal channel (17) on the outside of the cylinder (10), and one or more clamping spindles (21) are rotatively supported in and extending throughout the length of the channels (17) and arranged to be rotatively shifted by an activating mechanism (23) between a sensor (20) arresting position and a sensor (20) releasing position.
    Type: Application
    Filed: July 3, 2002
    Publication date: January 16, 2003
    Applicant: PARKER HANNIFIN AB
    Inventor: Folke Lennart Rollgardh