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:
May. 19, 2009
Filed:
Apr. 27, 2004
Matt Briscoe, Indianapolis, IN (US);
Rick Spencer, Indianapolis, IN (US);
Jonn R. Hitch, Indianapolis, IN (US);
Chad Buckles, Zionsville, IN (US);
Matt Briscoe, Indianapolis, IN (US);
Rick Spencer, Indianapolis, IN (US);
Jonn R. Hitch, Indianapolis, IN (US);
Chad Buckles, Zionsville, IN (US);
Beckman Coulter, Inc., Fullerton, CA (US);
Abstract
A system and method for compensating for hysteresis in laboratory liquid handling apparatus. The system comprises a carriage holding a drive gear that meshes with and drives a gear rack. A hysteresis brake is also provided on the carriage and opposes the movement of the drive gear to provide continued positive engagement of the drive gear with the gear rack even when the system is static. When the direction of travel of the gear rack is reversed, the drive gear rotates an additional distance that compensates for the aggregate hysteresis found in the drive train.