The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 21, 2000
Filed:
Mar. 10, 1999
John Patrick Gardiner, Londonderry, NH (US);
Heidelberger Druckmaschinen Aktiengesellschaft, Heidelberg, DE;
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.