Patents by Inventor David Sean Johnsen

David Sean Johnsen 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: 6863717
    Abstract: A rail plate handling device is provided for removing plates located on rail ties on a railroad track having a pair of rails, and includes a frame configured for movement relative to the track, at least one tie plate gripping assembly mounted to the frame, the assembly configured for grasping a selected tie plate, pulling the plate away from the rail and away from the tie, and subsequently releasing the plate onto the track. The device is mounted upon a cart which is movable on the track, and features gripping assemblies for working on both rails. A tie jack is preferably provided for ensuring the release of the tie from the gripped plate. Still another feature of the present device is a plate height mechanism associated with each gripping assembly for ensuring that the gripping assembly engages the plates at the proper height.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: March 8, 2005
    Assignee: Nordco Inc.
    Inventors: David Sean Johnsen, William D. Straub, Bruce M. Boczkiewicz
  • Patent number: 6832558
    Abstract: A riding rail tie plugging apparatus for plugging spike holes in ties on a railroad track includes a frame provided with wheels for supporting and moving the frame along the track. At least one reservoir is disposed in operational relationship to the frame for dispensing a supply of chemical tie-plugging solution. At least one applicator gun is in fluid communication with the at least one reservoir for dispensing the solution into the holes. At least one operator station is on the frame in operational relationship to the track and to the at least one applicator gun so that the at least one applicator gun is directly positionable by an operator disposed at the station for dispensing the epoxy solution into selected ones of the holes.
    Type: Grant
    Filed: October 11, 2002
    Date of Patent: December 21, 2004
    Assignee: Nordco Inc.
    Inventors: Robert M. Weber, Donald Christopher Noll, Leary Peterson, David Sean Johnsen
  • Patent number: 6755135
    Abstract: A combined tie extractor and plate remover for railroad track maintenance includes a frame configured for movement along the track and having a first side corresponding to a first side of the track and a second side corresponding to a second side of the track, each side of the track having a corresponding rail. A rail lifting apparatus associated with the frame is configured for lifting a selected one of the first and second rails away from the track. A plate remover assembly associated with the frame is configured for grasping and removing tie plates associated with each side of the track from a selected tie. At least one tie extracting assembly is disposed on the frame for extracting the gripped tie transversely relative to the track in conjunction with the removal of the tie plates.
    Type: Grant
    Filed: September 3, 2002
    Date of Patent: June 29, 2004
    Assignee: Nordco Inc.
    Inventors: David Sean Johnsen, William D. Straub, Bruce M. Boczkiewicz
  • Publication number: 20040069179
    Abstract: A riding rail tie plugging apparatus for plugging spike holes in ties on a railroad track includes a frame provided with wheels for supporting and moving the frame along the track. At least one reservoir is disposed in operational relationship to the frame for dispensing a supply of chemical tie-plugging solution. At least one applicator gun is in fluid communication with the at least one reservoir for dispensing the solution into the holes. At least one operator station is on the frame in operational relationship to the track and to the at least one applicator gun so that the at least one applicator gun is directly positionable by an operator disposed at the station for dispensing the epoxy solution into selected ones of the holes.
    Type: Application
    Filed: October 11, 2002
    Publication date: April 15, 2004
    Applicant: Nordco Inc
    Inventors: Robert M. Weber, Donald Christopher Noll, Leary Peterson, David Sean Johnsen
  • Publication number: 20030183115
    Abstract: A railway maintenance device movable on a railroad track having a pair of spaced rails, the device including a frame configured for movement relative to the track and having at least two side members. At least one track contacting element is associated with at least one of the sides. An adjustment mechanism is provided for adjusting the relative position of at least one of the track contacting elements to the frame to thus position the frame relative to the rails. The device preferably includes a fluid power cylinder associated with each track contacting element to control the position of the wheel relative to the frame, as well as a stop mechanism for adjustably limiting the pivoting action of the contacting element relative to the frame, and thus control the displacement of the element.
    Type: Application
    Filed: March 29, 2002
    Publication date: October 2, 2003
    Applicant: NORDCO INC.
    Inventors: David Sean Johnsen, William D. Straub, Bruce M. Boczkiewicz
  • Publication number: 20030183116
    Abstract: A rail plate handling device is provided for removing plates located on rail ties on a railroad track having a pair of rails, and includes a frame configured for movement relative to the track, at least one tie plate gripping assembly mounted to the frame, the assembly configured for grasping a selected tie plate, pulling the plate away from the rail and away from the tie, and subsequently releasing the plate onto the track. The device is mounted upon a cart which is movable on the track, and features gripping assemblies for working on both rails. A tie jack is preferably provided for ensuring the release of the tie from the gripped plate. Still another feature of the present device is a plate height mechanism associated with each gripping assembly for ensuring that the gripping assembly engages the plates at the proper height.
    Type: Application
    Filed: March 29, 2002
    Publication date: October 2, 2003
    Applicant: NORDCO INC.
    Inventors: David Sean Johnsen, William D. Straub, Bruce M. Boczkiewicz
  • Patent number: 6622633
    Abstract: A railway maintenance device movable on a railroad track having a pair of spaced rails, the device including a frame configured for movement relative to the track and having at least two side members. At least one track contacting element is associated with at least one of the sides. An adjustment mechanism is provided for adjusting the relative position of at least one of the track contacting elements to the frame to thus position the frame relative to the rails. The device preferably includes a fluid power cylinder associated with each track contacting element to control the position of the wheel relative to the frame, as well as a stop mechanism for adjustably limiting the pivoting action of the contacting element relative to the frame, and thus control the displacement of the element.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: September 23, 2003
    Assignee: Nordco Inc.
    Inventors: David Sean Johnsen, William D. Straub, Bruce M. Boczkiewicz
  • Publication number: 20030005850
    Abstract: A combined tie extractor and plate remover for railroad track maintenance includes a frame configured for movement along the track and having a first side corresponding to a first side of the track and a second side corresponding to a second side of the track, each side of the track having a corresponding rail. A rail lifting apparatus associated with the frame is configured for lifting a selected one of the first and second rails away from the track. A plate remover assembly associated with the frame is configured for grasping and removing tie plates associated with each side of the track from a selected tie. At least one tie extracting assembly is disposed on the frame for extracting the gripped tie transversely relative to the track in conjunction with the removal of the tie plates.
    Type: Application
    Filed: September 3, 2002
    Publication date: January 9, 2003
    Applicant: NORDCO INC.
    Inventors: David Sean Johnsen, William D. Straub, Bruce W. Boczkiewicz