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:
Aug. 19, 1997
Filed:
Dec. 15, 1995
Marc Noga, Ann Arbor, MI (US);
Robert Hall, Berkey, OH (US);
United Technologies Motor Systems, Inc., Columbus, MS (US);
Abstract
A vehicle transfer case for changing between two- and four-wheel modes of operation has a transmission with an inventive stop. The stop extends radially outwardly beyond the nominal height of gear teeth on a worm gear in the transmission. The stop engages a worm which is part of the transmission at a location outside of a primary contact area between the worm and worm gear. When the stop contacts the worm it stops further rotation of the worm gear. The motor for the worm gear is reversible such that both the worm and worm gear can rotate in either direction. A single stop defines two circumferentially spaced ends of travel. Since the stop contacts a moving surface on the worm, there is a reduced likelihood of seizure when compared to the prior art.