Patents by Inventor Bruce A Hiemstra

Bruce A Hiemstra 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: 6357955
    Abstract: A self retaining elongated pin for use in a polymer clevis is disclosed. The pin has a generally cylindrical shaft diameter with an enlarged head at one end. Knurling is provided on either the shaft or head to resist axial rotation of the pin. Axial translation of the pin is restrained by the head in the direction toward the head and by fetters in the direction away from the head. The fetters engage the clevis in an interference fit. The fetters are angulated such that the fetter tip is directed toward the head to preferentially favor insertion and resist removal.
    Type: Grant
    Filed: January 21, 2000
    Date of Patent: March 19, 2002
    Assignee: Johnson Controls Technology Company
    Inventors: Arthur W Hoffmann, Bruce A Hiemstra
  • Patent number: 5938164
    Abstract: A power seat adjuster for bucket type vehicle seats includes inboard and outboard track assemblies each including a fixed lower section, a movable upper or movable section and a precision sliding interface including roller bearings between the moving upper track and the fixed lower track, the surfaces of the tracks that are engaged by the roller bearings being crowned to provide a bearing surface that is slightly convex when the seat is unoccupied but which becomes nearly flat when the seat is occupied, and the bearing surfaces of the track being coated with a multi-layer dry film lubricant including a base coating of an anti-friction material and a top coating of an anti-stick material.
    Type: Grant
    Filed: October 31, 1997
    Date of Patent: August 17, 1999
    Assignee: Hoover Universal, Inc.
    Inventors: James A. Kargol, Robert W. Jones, Bruce A. Hiemstra, Marc D. Hewko, Yannis Poulos, Ronald R. Siegrist, Wee Tzee Gam, David W. Husted, Chester S. Fudala
  • Patent number: 5707035
    Abstract: A power seat adjuster for bucket type vehicle seats includes inboard and outboard track assemblies each including a fixed lower section, a movable upper or movable section and a precision sliding interface including roller bearings between the moving upper track and the fixed lower track, the surfaces of the tracks that are engaged by the roller bearings being crowned to provide a bearing surface that is slightly convex when the seat is unoccupied but which becomes nearly flat when the seat is occupied, and the bearing surfaces of the track being coated with a multi-layer dry film lubricant including a base coating of an anti-friction material and a top coating of an anti-stick material.
    Type: Grant
    Filed: August 31, 1994
    Date of Patent: January 13, 1998
    Assignee: Hoover Universal, Inc.
    Inventors: James A. Kargol, Robert W. Jones, Bruce A. Hiemstra, Marc D. Hewko, Yannis Poulos, Ronald R. Siegrist, Wee Tzee Gam, David W. Husted, Chester S. Fudala
  • Patent number: 4494795
    Abstract: An adjustor for chairs with tilting backs and the like, comprises a threaded spindle connected with the chair back, and a gear wheel threadedly mounted on the spindle. The gear wheel is retained in a housing attached to a relatively stationary portion of the chair, such that when the chair back is tilted, the spindle rotates the gear wheel in the housing. A pawl is shifted into and out of engagement with the gear wheel to selectively lock the chair back in a wide variety of different angular positions.
    Type: Grant
    Filed: May 6, 1982
    Date of Patent: January 22, 1985
    Assignee: Steelcase Inc.
    Inventors: Charles P. Roossien, Brian Chambers, Bruce Hiemstra