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:
Dec. 09, 2003
Filed:
Jun. 24, 2002
Roland Bosa, Fremont, CA (US);
David McVicar, El Dorado, CA (US);
David Wegmuller, Union City, CA (US);
Logitech Europe S.A., , CH;
Abstract
Embodiments of the present invention are directed to gear based transmission apparatus that are configured to reduce or eliminate the backlash effects. In one embodiment, a transmission apparatus comprises a follower gear, a first drive gear set coupled with the follower gear to drive the follower gear, and a second drive gear set coupled with the follower gear to drive the follower gear. The first drive gear set includes at least one gear, and the second drive gear set includes at least one gear. A controller is coupled with the first drive gear set and the second drive gear set. The controller is configured to synchronize the first drive gear set and the second drive gear set to drive the follower gear in a first direction in a first transmission drive mode, the controller being configured to reverse the direction of the first drive gear set by a phase-shift time period before reversing the direction of the second drive gear set in a transmission reversal mode so as to reduce or eliminate backlash in the first drive gear set prior to engaging the first drive gear set with the follower gear to drive the follower gear in a second direction opposite from the first direction.