Patents by Inventor Keith L. Buffinga

Keith L. Buffinga 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: 8307473
    Abstract: A patient transfer device including a retractable wheel assembly, a caster brake and a track extension is provided. The retractable wheel assembly can include a cammed linkage arm operatively coupled to a retractable wheel. As the patient transfer device moves downwardly over a step, the cammed linkage arm can bear against the step, rotating the retractable wheel to a stowed position. The caster brake and the track extension can cooperate to stabilize the patient transfer device at the top and bottom of a stairway, respectively. The caster brake and the track extension can each include a high-friction engagement surface that is vertically offset from the respective caster and track. The retractable wheel assembly, caster brake and track extension can improve the control the patient transfer device along level, ramped and stepped surfaces, particularly for operators lacking sufficient training or experience.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: November 13, 2012
    Assignee: Stryker Coropration
    Inventors: Clifford E. Lambarth, Alfred J. Dacey, IV, Chris Gentile, Keith L. Buffinga
  • Patent number: 7837282
    Abstract: A cabinet includes side panels, a back panel, and a top panel that frictionally-attach together with non-intrusive integrally-formed connectors. The illustrated base is screw-attached, and includes openings for routing wiring within the cabinet. Brackets are adapted to support shelves in the cabinet in either a flush or inset condition, and at different heights based on which cabinet slots they engage and based on their orientation in those slots. A light-transmitting top panel and top shelf can be used to provide improved light within the cabinet. Hinge brackets on the cabinet support either a thick door with internal storage space, a proud door or an inset door. Drawers supported in the cabinet include a lock within the drawer's header for operating a vertical cabinet lock rod.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: November 23, 2010
    Assignee: Steelcase Inc.
    Inventors: Bradley D. Youngs, Randall P. Nelsen, Timothy J. Wiersma, Kevin J. Longhurst, Keith L. Buffinga, William A. Korreck, Michael A. Jourden, Niels Joachim Eilmus, Michael W. Welsh
  • Patent number: 6942306
    Abstract: A cabinet includes side panels, a back panel, and a top panel that frictionally-attach together with non-intrusive integrally-formed connectors. The illustrated base is screw-attached, and includes openings for routing wiring within the cabinet. Brackets are adapted to support shelves in the cabinet in either a flush or inset condition, and at different heights based on which cabinet slots they engage and based on their orientation in those slots. A light-transmitting top panel and top shelf can be used to provide improved light within the cabinet. Hinge brackets on the cabinet support either a thick door with internal storage space, a proud door or an inset door. Drawers supported in the cabinet include a lock within the drawer's header for operating a vertical cabinet lock rod.
    Type: Grant
    Filed: March 12, 2002
    Date of Patent: September 13, 2005
    Assignee: Steelcase Development Company
    Inventors: Bradley D. Youngs, Randall P. Nelsen, Timothy J. Wiersma, Kevin J. Longhurst, Keith L. Buffinga, William A. Korreck, Michael A. Jourden, Niels Joachim Eilmus, Michael W. Welsh
  • Publication number: 20030173878
    Abstract: A cabinet includes side panels, a back panel, and a top panel that frictionally-attach together with non-intrusive integrally-formed connectors. The illustrated base is screw-attached, and includes openings for routing wiring within the cabinet. Brackets are adapted to support shelves in the cabinet in either a flush or inset condition, and at different heights based on which cabinet slots they engage and based on their orientation in those slots. A light-transmitting top panel and top shelf can be used to provide improved light within the cabinet. Hinge brackets on the cabinet support either a thick door with internal storage space, a proud door or an inset door. Drawers supported in the cabinet include a lock within the drawer's header for operating a vertical cabinet lock rod.
    Type: Application
    Filed: March 12, 2002
    Publication date: September 18, 2003
    Inventors: Bradley D. Youngs, Randall P. Nelsen, Timothy J. Wiersma, Kevin J. Longhurst, Keith L. Buffinga, William A. Korreck, Michael A. Jourden, Niels Joachim Eilmus, Michael W. Welsh