Patents by Inventor Chris Holwerda

Chris Holwerda 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).

  • Chair for active engagement of user
    Patent number: 11805905
    Abstract: A lower chair for supporting an upper chair on which a user sits. The lower chair including a base, a swivel mechanism supported by the base and defining a vertical swivel axis, and a four-bar linkage mounted to the swivel mechanism for rotation about the swivel axis. The four-bar linkage includes a coupler link that moves about a coupler curve. The lower chair also includes a column having a lower end affixed to the coupler link for movement of the lower end along the coupler curve. The column defines a column axis and is adapted to support the upper chair.
    Type: Grant
    Filed: November 2, 2022
    Date of Patent: November 7, 2023
    Assignee: MILLERKNOLL, INC.
    Inventors: Mark Goetz, Brock Walker, John Aldrich, Andy Squires, Chris Holwerda, Adwait Bhagwat
  • Chair for active engagement of user
    Patent number: 11596232
    Abstract: A chair includes a lower chair and an upper chair. The lower chair includes a tilt-swivel mechanism defining a vertical swivel axis, a yoke, and a column extending between the tilt-swivel mechanism and the yoke. The upper chair is pivotably mounted to the yoke about a horizontal upper chair pivot axis. The upper chair includes a seat adapted to cradle the ischial tuberosities of a user.
    Type: Grant
    Filed: April 15, 2020
    Date of Patent: March 7, 2023
    Assignee: MillerKnoll, Inc.
    Inventors: Mark Goetz, Brock Walker, John Aldrich, Andy Squires, Chris Holwerda, Adwait Bhagwat
  • CHAIR FOR ACTIVE ENGAGEMENT OF USER
    Publication number: 20230049996
    Abstract: A lower chair for supporting an upper chair on which a user sits. The lower chair including a base, a swivel mechanism supported by the base and defining a vertical swivel axis, and a four-bar linkage mounted to the swivel mechanism for rotation about the swivel axis. The four-bar linkage includes a coupler link that moves about a coupler curve. The lower chair also includes a column having a lower end affixed to the coupler link for movement of the lower end along the coupler curve. The column defines a column axis and is adapted to support the upper chair.
    Type: Application
    Filed: November 2, 2022
    Publication date: February 16, 2023
    Inventors: Mark Goetz, Brock Walker, John Aldrich, Andy Squires, Chris Holwerda, Adwait Bhagwat
  • CHAIR FOR ACTIVE ENGAGEMENT OF USER
    Publication number: 20220087424
    Abstract: A chair includes a lower chair and an upper chair. The lower chair includes a tilt-swivel mechanism defining a vertical swivel axis, a yoke, and a column extending between the tilt-swivel mechanism and the yoke. The upper chair is pivotably mounted to the yoke about a horizontal upper chair pivot axis. The upper chair includes a seat adapted to cradle the ischial tuberosities of a user.
    Type: Application
    Filed: April 15, 2020
    Publication date: March 24, 2022
    Inventors: Mark Goetz, Brock Walker, John Aldrich, Andy Squires, Chris Holwerda, Adwait Bhagwat