Patents Assigned to Sullivan Research & Development LLC
  • Patent number: 6449917
    Abstract: A suspended acoustical ceiling access panel system includes a door frame for supporting a standard ceiling tile and hanger assemblies in the form of pivot brackets that are pivotally attached at each of opposite sides of the door frame near one end of the frame. The pivot brackets are formed to be easily slid over standard ceiling grid members and releasably clamped to the grid members while pivotally supporting the door frame. The door frame is also provided with latch members at an end of the frame opposite from the end pivotally attached to the pivot brackets and ceiling grid members. The latch members can be manually positioned to engage a ceiling grid member when the access panel system is in a closed position.
    Type: Grant
    Filed: February 2, 2000
    Date of Patent: September 17, 2002
    Assignee: Sullivan Research & Development LLC
    Inventor: Thomas J. Sullivan, III