Patents by Inventor James R. Dykstra

James R. Dykstra 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: 6351917
    Abstract: A partition frame assembly includes a lower partition frame having at least two elongated lower structural uprights. The lower partition frame defines an upper edge, and includes an upwardly-opening utilities channel extending adjacent the upper edge to permit lay-in of utility lines along the upper edge of the lower partition frame. An upper extension frame is positioned above the lower partition frame, and includes at least two elongated upper structural uprights, each of which is in vertical registry with the lower structural uprights. The partition frame includes first and second brackets, each of which rigidly interconnect a selected upper structural upright to a selected lower structural upright. Each bracket has a lower end rigidly interconnected with the selected lower structural upright, and an upper end rigidly interconnected with the selected upper structural upright.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: March 5, 2002
    Assignee: Steelcase Development Corporation
    Inventors: Douglas B. MacDonald, Steven E. Sanders, James R. Dykstra
  • Patent number: 6330773
    Abstract: An extension panel for connection to a lower panel of the type having vertical uprights defining upper ends and including a utilities passageway extending along an upper edge of the lower panel for receiving utility conduits therein. The extension panel includes a pair of space-apart upright posts, and at least one beam extending between the posts and rigidly interconnecting the same. A pair of structural members extend downwardly from the lower ends of the posts to engage the lower panel and rigidly interconnect the extension panel and the lower panel. The structural members are laterally spaced-apart to define a downwardly-opening utilities opening therebetween. The utilities opening is positioned in alignment with the utilities passageway of the lower panel to permit utilities conduits to pass through the utilities opening when the extension is secured to the lower panel.
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: December 18, 2001
    Assignee: Steelcase Development Corporation
    Inventors: Douglas B. MacDonald, Jonathan J. King, Steven E. Sanders, Alan E. Rheault, James R. Dykstra, Michael L. Waalkes, David A. Walz, Patricia A. Williams, Donald P. Gravel, Joseph Chang
  • Patent number: 6170927
    Abstract: A drawer interlinking system for a storage cabinet is disclosed herein. The cabinet includes a frame, a first sliding assembly, and a second sliding assembly. Each sliding assembly is movable between an extended position and a retracted position relative to the frame. The frame includes a flexible member coupled at a first end to the first sliding assembly. The line is directed by a first guide coupled to the frame in association with the first sliding assembly, a guide assembly coupled to the frame and spaced apart from the first guide, a glide assembly coupled to the frame by a tension member, and a second guide coupled to the frame in association with the second sliding assembly and spaced apart from the guide assembly. The flexible member is coupled at a second end to the second sliding assembly, so that when one sliding assembly is extended from the frame the other sliding assembly is retracted into the frame. The guide assembly can comprise a left pulley connected to a right pulley.
    Type: Grant
    Filed: November 20, 1998
    Date of Patent: January 9, 2001
    Assignee: Steelcase Development Inc.
    Inventors: James R. Dykstra, David A. Oetman