Patents by Inventor John Patrick Gardiner

John Patrick Gardiner 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: 6148684
    Abstract: An anti-backlash gear assembly includes a drive gear that is fixably mountable on a drive shaft that drives the drive gear and has a plurality of drive gear clearance holes. A rod ring is fixed to one side of the drive gear. A flank gear having a plurality of flank gear clearance holes corresponding to the drive gear clearance holes is also mounted on the drive shaft adjacent to the drive gear. A force ring having a plurality of receiving holes is mounted to the flank gear. Springs having a first end fixed to the rod ring and extend through the drive gear clearance holes, the flank gear clearance holes, and into the receiving holes. The springs exert a force biasing the flank gear and the drive gear to rotate in opposite directions.
    Type: Grant
    Filed: March 10, 1999
    Date of Patent: November 21, 2000
    Assignee: Heidelberger Druckmaschinen Aktiengesellschaft
    Inventor: John Patrick Gardiner